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\u03b5\u03ba\u03c4\u03b9\u03bc\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ae \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03c4\u03b7\u03c2 \u03c5\u03c0\u03cc \u03b5\u03be\u03ad\u03c4\u03b1\u03c3\u03b7 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ae\u03c2.<\/li>\n\n\n\n<li><strong>\u03a4\u03b1\u03c5\u03c4\u03cc\u03c7\u03c1\u03bf\u03bd\u03b7 \u03c3\u03c5\u03bb\u03bb\u03bf\u03b3\u03ae \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd: <\/strong>\u03a4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf\u03c5\u03c2 \u03c3\u03c5\u03bc\u03bc\u03b5\u03c4\u03ad\u03c7\u03bf\u03bd\u03c4\u03b5\u03c2 \u03c3\u03c4\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03bc\u03b9\u03b1\u03c2 \u03b5\u03bd\u03b9\u03b1\u03af\u03b1\u03c2 \u03c0\u03b5\u03c1\u03b9\u03cc\u03b4\u03bf\u03c5, \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03bc\u03ad\u03c3\u03c9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03ce\u03bd, \u03c3\u03c5\u03bd\u03b5\u03bd\u03c4\u03b5\u03cd\u03be\u03b5\u03c9\u03bd \u03ae \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03ae\u03c3\u03b5\u03c9\u03bd. \u0391\u03c5\u03c4\u03cc \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c3\u03c4\u03bf\u03c5\u03c2 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03bd\u03b1 \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03c5\u03bd \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 \u03b1\u03c0\u03cc \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ac \u03ac\u03c4\u03bf\u03bc\u03b1 \u03c4\u03b1\u03c5\u03c4\u03cc\u03c7\u03c1\u03bf\u03bd\u03b1.<\/li>\n\n\n\n<li><strong>\u03a0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ad\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ad\u03c2: <\/strong>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03c3\u03c5\u03c7\u03bd\u03ac \u03b5\u03be\u03b5\u03c4\u03ac\u03b6\u03bf\u03c5\u03bd \u03c0\u03bf\u03bb\u03bb\u03ad\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ad\u03c2 \u03c4\u03b1\u03c5\u03c4\u03cc\u03c7\u03c1\u03bf\u03bd\u03b1. \u039f\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b4\u03b9\u03b5\u03c1\u03b5\u03c5\u03bd\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03c3\u03c7\u03ad\u03c3\u03b5\u03b9\u03c2, \u03c4\u03bf\u03c5\u03c2 \u03c3\u03c5\u03c3\u03c7\u03b5\u03c4\u03b9\u03c3\u03bc\u03bf\u03cd\u03c2 \u03ae \u03c4\u03b1 \u03c0\u03c1\u03cc\u03c4\u03c5\u03c0\u03b1 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b4\u03b9\u03b1\u03c6\u03cc\u03c1\u03c9\u03bd \u03c0\u03b1\u03c1\u03b1\u03b3\u03cc\u03bd\u03c4\u03c9\u03bd \u03b5\u03bd\u03c4\u03cc\u03c2 \u03c4\u03bf\u03c5 \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03bf\u03cd \u03c4\u03b7\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2.<\/li>\n\n\n\n<li><strong>\u0393\u03c1\u03ae\u03b3\u03bf\u03c1\u03b7 \u03ba\u03b1\u03b9 \u03bf\u03b9\u03ba\u03bf\u03bd\u03bf\u03bc\u03b9\u03ba\u03ac \u03b1\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03ae:<\/strong> \u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ac \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03bf\u03b9\u03ba\u03bf\u03bd\u03bf\u03bc\u03b9\u03ba\u03ac \u03b1\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c3\u03b5 \u03c3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03b9\u03c2 \u03b4\u03b9\u03b1\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2. \u0391\u03c0\u03b1\u03b9\u03c4\u03bf\u03cd\u03bd \u03bb\u03b9\u03b3\u03cc\u03c4\u03b5\u03c1\u03bf\u03c5\u03c2 \u03c0\u03cc\u03c1\u03bf\u03c5\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b4\u03b9\u03b5\u03be\u03b1\u03c7\u03b8\u03bf\u03cd\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac, \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c2 \u03c0\u03bf\u03c5 \u03c4\u03b9\u03c2 \u03ba\u03b1\u03b8\u03b9\u03c3\u03c4\u03ac \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03b5\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b9\u03b5\u03c1\u03b5\u03cd\u03bd\u03b7\u03c3\u03b7 \u03bc\u03b5\u03b3\u03ac\u03bb\u03c9\u03bd \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03ce\u03bd.<\/li>\n<\/ol>\n\n\n\n<h3 id=\"h-types-of-cross-sectional-studies\">\u03a4\u03cd\u03c0\u03bf\u03b9 \u03b4\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03c9\u03bd \u03bc\u03b5\u03bb\u03b5\u03c4\u03ce\u03bd<\/h3>\n\n\n\n<ol>\n<li><strong>\u03a0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03b9\u03ba\u03ae \u03b4\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7: <\/strong>\u0391\u03c5\u03c4\u03cc\u03c2 \u03bf \u03c4\u03cd\u03c0\u03bf\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2 \u03b1\u03c0\u03bf\u03c3\u03ba\u03bf\u03c0\u03b5\u03af \u03c3\u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03bf\u03c5 \u03b5\u03c0\u03b9\u03c0\u03bf\u03bb\u03b1\u03c3\u03bc\u03bf\u03cd \u03ba\u03b1\u03b9 \u03c4\u03b7\u03c2 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae\u03c2 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03c9\u03bd \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ce\u03bd, \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03c6\u03bf\u03c1\u03ce\u03bd \u03ae \u03c3\u03c5\u03bd\u03b8\u03b7\u03ba\u03ce\u03bd \u03c3\u03b5 \u03ad\u03bd\u03b1\u03bd \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03cc. \u039f\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03c5\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03b3\u03b9\u03b1 \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ad\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ad\u03c2 \u03b5\u03bd\u03b4\u03b9\u03b1\u03c6\u03ad\u03c1\u03bf\u03bd\u03c4\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03b1\u03bb\u03cd\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03c0\u03c1\u03cc\u03c4\u03c5\u03c0\u03b1 \u03c0\u03bf\u03c5 \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9.<\/li>\n\n\n\n<li><strong>\u0391\u03bd\u03b1\u03bb\u03c5\u03c4\u03b9\u03ba\u03ae \u03b4\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7: <\/strong>\u039f\u03b9 \u03b1\u03bd\u03b1\u03bb\u03c5\u03c4\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03ae\u03c2 \u03c5\u03c0\u03b5\u03c1\u03b2\u03b1\u03af\u03bd\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03bf\u03c5 \u03b5\u03c0\u03b9\u03c0\u03bf\u03bb\u03b1\u03c3\u03bc\u03bf\u03cd \u03ba\u03b1\u03b9 \u03b5\u03bc\u03b2\u03b1\u03b8\u03cd\u03bd\u03bf\u03c5\u03bd \u03c3\u03c4\u03b7\u03bd \u03b5\u03be\u03ad\u03c4\u03b1\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c3\u03c5\u03c3\u03c7\u03b5\u03c4\u03af\u03c3\u03b5\u03c9\u03bd \u03ae \u03c4\u03c9\u03bd \u03c3\u03c7\u03ad\u03c3\u03b5\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b4\u03b9\u03b1\u03c6\u03cc\u03c1\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd. \u039f\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03b4\u03b9\u03b5\u03c1\u03b5\u03c5\u03bd\u03bf\u03cd\u03bd \u03c4\u03b9\u03c2 \u03c0\u03b9\u03b8\u03b1\u03bd\u03ad\u03c2 \u03c3\u03c5\u03bd\u03b4\u03ad\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03bf\u03c5\u03c2 \u03c0\u03b1\u03c1\u03ac\u03b3\u03bf\u03bd\u03c4\u03b5\u03c2 \u03c0\u03bf\u03c5 \u03b5\u03c0\u03b7\u03c1\u03b5\u03ac\u03b6\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03b5\u03bc\u03c6\u03ac\u03bd\u03b9\u03c3\u03b7 \u03b5\u03bd\u03cc\u03c2 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03bf\u03c2.<\/li>\n\n\n\n<li><strong>\u03a3\u03c5\u03b3\u03ba\u03c1\u03b9\u03c4\u03b9\u03ba\u03ae \u03b4\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7:<\/strong> \u039f\u03b9 \u03c3\u03c5\u03b3\u03ba\u03c1\u03b9\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03c5\u03bd \u03c4\u03b7 \u03c3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ce\u03bd \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03ce\u03bd \u03ae \u03bf\u03bc\u03ac\u03b4\u03c9\u03bd \u03b5\u03bd\u03c4\u03cc\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03bf\u03cd \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03b5\u03bd\u03c4\u03bf\u03c0\u03b9\u03c3\u03bc\u03cc \u03b4\u03b9\u03b1\u03ba\u03c5\u03bc\u03ac\u03bd\u03c3\u03b5\u03c9\u03bd \u03c3\u03c4\u03bf\u03bd \u03b5\u03c0\u03b9\u03c0\u03bf\u03bb\u03b1\u03c3\u03bc\u03cc \u03ae \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03c9\u03bd \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ce\u03bd \u03ae \u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03c9\u03bd. \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03b5\u03af\u03b4\u03bf\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2 \u03b2\u03bf\u03b7\u03b8\u03ac \u03c4\u03bf\u03c5\u03c2 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03ad\u03c2 \u03ae \u03c4\u03b9\u03c2 \u03bf\u03bc\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03bf\u03bc\u03ac\u03b4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b5\u03c1\u03b5\u03c5\u03bd\u03ae\u03c3\u03bf\u03c5\u03bd \u03c0\u03b9\u03b8\u03b1\u03bd\u03bf\u03cd\u03c2 \u03c0\u03b1\u03c1\u03ac\u03b3\u03bf\u03bd\u03c4\u03b5\u03c2 \u03c0\u03bf\u03c5 \u03c3\u03c5\u03bc\u03b2\u03ac\u03bb\u03bb\u03bf\u03c5\u03bd \u03c3\u03b5 \u03b1\u03c5\u03c4\u03ad\u03c2 \u03c4\u03b9\u03c2 \u03b1\u03bd\u03b9\u03c3\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2.<\/li>\n\n\n\n<li><strong>\u039a\u03bf\u03b9\u03bd\u03bf\u03c4\u03b9\u03ba\u03ae \u03b4\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7:<\/strong> \u039f\u03b9 \u03ba\u03bf\u03b9\u03bd\u03bf\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b5\u03c0\u03b9\u03ba\u03b5\u03bd\u03c4\u03c1\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03b5\u03c2 \u03ba\u03bf\u03b9\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03ae \u03b3\u03b5\u03c9\u03b3\u03c1\u03b1\u03c6\u03b9\u03ba\u03ad\u03c2 \u03c0\u03b5\u03c1\u03b9\u03bf\u03c7\u03ad\u03c2. \u039f\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03c5\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03b5 \u03b1\u03c5\u03c4\u03ad\u03c2 \u03c4\u03b9\u03c2 \u03ba\u03bf\u03b9\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03bf\u03bd \u03b5\u03c0\u03b9\u03c0\u03bf\u03bb\u03b1\u03c3\u03bc\u03cc \u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03c9\u03bd \u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03c9\u03bd, \u03c0\u03b1\u03c1\u03b1\u03b3\u03cc\u03bd\u03c4\u03c9\u03bd \u03ba\u03b9\u03bd\u03b4\u03cd\u03bd\u03bf\u03c5 \u03ae \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03c6\u03bf\u03c1\u03ce\u03bd \u03c0\u03bf\u03c5 \u03c3\u03c7\u03b5\u03c4\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c5\u03b3\u03b5\u03af\u03b1 \u03ba\u03b1\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03bf\u03bd\u03b1\u03b4\u03b9\u03ba\u03ad\u03c2 \u03c3\u03c4\u03bf \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03bf \u03c0\u03b5\u03c1\u03b9\u03b2\u03ac\u03bb\u03bb\u03bf\u03bd.<\/li>\n<\/ol>\n\n\n\n<h2 id=\"h-cross-sectional-study-pros-and-cons\">\u03a0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03bc\u03b5\u03b9\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b4\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2<\/h2>\n\n\n\n<ol>\n<li>\u03a0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c4\u03c9\u03bd \u03b4\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03c9\u03bd \u03bc\u03b5\u03bb\u03b5\u03c4\u03ce\u03bd<\/li>\n<\/ol>\n\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>\u0391\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1<\/strong><\/td><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b5\u03c1\u03b5\u03c2 \u03c3\u03c4\u03b7 \u03b4\u03b9\u03b5\u03be\u03b1\u03b3\u03c9\u03b3\u03ae \u03c4\u03bf\u03c5\u03c2 \u03c3\u03b5 \u03c3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03b9\u03c2 \u03b4\u03b9\u03b1\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2, \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5 \u03cc\u03c4\u03b9 \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03bc\u03af\u03b1 \u03bc\u03cc\u03bd\u03bf \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae \u03c3\u03c4\u03b9\u03b3\u03bc\u03ae. \u0391\u03c5\u03c4\u03cc \u03c4\u03b9\u03c2 \u03ba\u03b1\u03b8\u03b9\u03c3\u03c4\u03ac \u03bf\u03b9\u03ba\u03bf\u03bd\u03bf\u03bc\u03b9\u03ba\u03ac \u03b1\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ad\u03c2, \u03b9\u03b4\u03af\u03c9\u03c2 \u03cc\u03c4\u03b1\u03bd \u03bc\u03b5\u03bb\u03b5\u03c4\u03bf\u03cd\u03bd \u03bc\u03b5\u03b3\u03ac\u03bb\u03bf\u03c5\u03c2 \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03bf\u03cd\u03c2.<\/td><\/tr><tr><td><strong>\u0394\u03b9\u03b5\u03c1\u03b5\u03cd\u03bd\u03b7\u03c3\u03b7 \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ce\u03bd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd<\/strong><\/td><td>\u039f\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b5\u03be\u03b5\u03c4\u03ac\u03c3\u03bf\u03c5\u03bd \u03c4\u03b1\u03c5\u03c4\u03cc\u03c7\u03c1\u03bf\u03bd\u03b1 \u03c0\u03bf\u03bb\u03bb\u03ad\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ad\u03c2 \u03c3\u03b5 \u03bc\u03b9\u03b1 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ae \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7. \u0391\u03c5\u03c4\u03cc \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c4\u03b7 \u03b4\u03b9\u03b5\u03c1\u03b5\u03cd\u03bd\u03b7\u03c3\u03b7 \u03c3\u03c5\u03c3\u03c7\u03b5\u03c4\u03af\u03c3\u03b5\u03c9\u03bd, \u03c0\u03c1\u03bf\u03c4\u03cd\u03c0\u03c9\u03bd \u03ae \u03c3\u03c7\u03ad\u03c3\u03b5\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b4\u03b9\u03b1\u03c6\u03cc\u03c1\u03c9\u03bd \u03c0\u03b1\u03c1\u03b1\u03b3\u03cc\u03bd\u03c4\u03c9\u03bd \u03b5\u03bd\u03c4\u03cc\u03c2 \u03c4\u03bf\u03c5 \u03bc\u03b5\u03bb\u03b5\u03c4\u03ce\u03bc\u03b5\u03bd\u03bf\u03c5 \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03bf\u03cd.<\/td><\/tr><tr><td><strong>\u0391\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03cc\u03c3\u03c4\u03bf\u03c5\u03c2-\u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2<\/strong><\/td><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03c0\u03b9\u03bf \u03b1\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b1\u03c0\u03cc \u03c4\u03b9\u03c2 \u03b4\u03b9\u03b1\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2, \u03ba\u03b1\u03b8\u03ce\u03c2 \u03b1\u03c0\u03b1\u03b9\u03c4\u03bf\u03cd\u03bd \u03bb\u03b9\u03b3\u03cc\u03c4\u03b5\u03c1\u03bf\u03c5\u03c2 \u03c0\u03cc\u03c1\u03bf\u03c5\u03c2, \u03bc\u03b9\u03ba\u03c1\u03cc\u03c4\u03b5\u03c1\u03b1 \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ac \u03c0\u03bb\u03b1\u03af\u03c3\u03b9\u03b1 \u03ba\u03b1\u03b9 \u03b4\u03b5\u03bd \u03b1\u03c0\u03b1\u03b9\u03c4\u03bf\u03cd\u03bd \u03b1\u03be\u03b9\u03bf\u03bb\u03bf\u03b3\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7\u03c2.<\/td><\/tr><tr><td><strong>\u03a0\u03c1\u03b1\u03ba\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1<\/strong><\/td><td>\u039f\u03b9 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b1\u03c5\u03c4\u03ad\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03c1\u03b1\u03ba\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b9\u03b5\u03c1\u03b5\u03cd\u03bd\u03b7\u03c3\u03b7 \u03b8\u03b5\u03bc\u03ac\u03c4\u03c9\u03bd \u03c0\u03bf\u03c5 \u03b1\u03c0\u03b1\u03b9\u03c4\u03bf\u03cd\u03bd \u03b5\u03c6\u03ac\u03c0\u03b1\u03be \u03b1\u03be\u03b9\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7 \u03ae \u03cc\u03c4\u03b1\u03bd \u03b7 \u03bc\u03b1\u03ba\u03c1\u03bf\u03c0\u03c1\u03cc\u03b8\u03b5\u03c3\u03bc\u03b7 \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7 \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03c6\u03b9\u03ba\u03c4\u03ae \u03ae \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03b7.<\/td><\/tr><tr><td><strong>\u03a0\u03c1\u03bf\u03c3\u03b2\u03b1\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1<\/strong><\/td><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ac \u03c0\u03c1\u03bf\u03c3\u03b9\u03c4\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b4\u03b9\u03b5\u03be\u03b1\u03c7\u03b8\u03bf\u03cd\u03bd \u03b1\u03c0\u03cc \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03bc\u03b5 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ac \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03b5\u03bc\u03c0\u03b5\u03b9\u03c1\u03bf\u03b3\u03bd\u03c9\u03bc\u03bf\u03c3\u03cd\u03bd\u03b7\u03c2. \u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03b5\u03cd\u03bf\u03c5\u03bd \u03c9\u03c2 \u03c7\u03c1\u03ae\u03c3\u03b9\u03bc\u03bf \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03c4\u03cc\u03c3\u03bf \u03b3\u03b9\u03b1 \u03b1\u03c1\u03c7\u03ac\u03c1\u03b9\u03bf\u03c5\u03c2 \u03cc\u03c3\u03bf \u03ba\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03ad\u03bc\u03c0\u03b5\u03b9\u03c1\u03bf\u03c5\u03c2 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b9\u03b5\u03c1\u03b5\u03cd\u03bd\u03b7\u03c3\u03b7 \u03c6\u03b1\u03b9\u03bd\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c3\u03b5 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03bf\u03cd.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ol start=\"2\">\n<li>\u039c\u03b5\u03b9\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c4\u03c9\u03bd \u03b4\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03c9\u03bd \u03bc\u03b5\u03bb\u03b5\u03c4\u03ce\u03bd<\/li>\n<\/ol>\n\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>\u03a0\u03b5\u03c1\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03b7 \u03b1\u03b9\u03c4\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1<\/strong><\/td><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03b5 \u03b8\u03ad\u03c3\u03b7 \u03bd\u03b1 \u03ba\u03b1\u03b8\u03bf\u03c1\u03af\u03c3\u03bf\u03c5\u03bd \u03b1\u03b9\u03c4\u03b9\u03ce\u03b4\u03b5\u03b9\u03c2 \u03c3\u03c7\u03ad\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd. \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5 \u03cc\u03c4\u03b9 \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03bc\u03af\u03b1 \u03bc\u03cc\u03bd\u03bf \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae \u03c3\u03c4\u03b9\u03b3\u03bc\u03ae, \u03b5\u03af\u03bd\u03b1\u03b9 \u03b4\u03cd\u03c3\u03ba\u03bf\u03bb\u03bf \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03c4\u03b5\u03af \u03b7 \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae \u03b1\u03bb\u03bb\u03b7\u03bb\u03bf\u03c5\u03c7\u03af\u03b1 \u03c4\u03c9\u03bd \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c4\u03c9\u03bd \u03ae \u03bd\u03b1 \u03b4\u03b9\u03b1\u03c0\u03b9\u03c3\u03c4\u03c9\u03b8\u03b5\u03af \u03b5\u03ac\u03bd \u03bc\u03b9\u03b1 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03b7 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ae \u03b5\u03c0\u03b7\u03c1\u03b5\u03ac\u03b6\u03b5\u03b9 \u03ac\u03bc\u03b5\u03c3\u03b1 \u03bc\u03b9\u03b1 \u03ac\u03bb\u03bb\u03b7.<\/td><\/tr><tr><td><strong>\u039c\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1 \u03b1\u03bd\u03ac\u03ba\u03bb\u03b7\u03c3\u03b7\u03c2<\/strong><\/td><td>\u039f\u03b9 \u03c3\u03c5\u03bc\u03bc\u03b5\u03c4\u03ad\u03c7\u03bf\u03bd\u03c4\u03b5\u03c2 \u03c3\u03b5 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b2\u03b1\u03c3\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7 \u03bc\u03bd\u03ae\u03bc\u03b7 \u03c4\u03bf\u03c5\u03c2 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03bf\u03c5\u03bd \u03c0\u03b1\u03c1\u03b5\u03bb\u03b8\u03bf\u03bd\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03c6\u03bf\u03c1\u03ad\u03c2 \u03ae \u03b5\u03bc\u03c0\u03b5\u03b9\u03c1\u03af\u03b5\u03c2. \u0391\u03c5\u03c4\u03cc \u03b5\u03b9\u03c3\u03ac\u03b3\u03b5\u03b9 \u03c4\u03b7\u03bd \u03c0\u03b9\u03b8\u03b1\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03bc\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03b1\u03bd\u03ac\u03ba\u03bb\u03b7\u03c3\u03b7\u03c2, \u03cc\u03c0\u03bf\u03c5 \u03bf\u03b9 \u03c3\u03c5\u03bc\u03bc\u03b5\u03c4\u03ad\u03c7\u03bf\u03bd\u03c4\u03b5\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b4\u03c5\u03c3\u03ba\u03bf\u03bb\u03b5\u03cd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03b1\u03bd\u03b1\u03ba\u03b1\u03bb\u03ad\u03c3\u03bf\u03c5\u03bd \u03ae \u03bd\u03b1 \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03bf\u03c5\u03bd \u03bc\u03b5 \u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03b1 \u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03b5\u03c2 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2, \u03bf\u03b4\u03b7\u03b3\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c3\u03b5 \u03b1\u03bd\u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03b5\u03c2 \u03c3\u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1.<\/td><\/tr><tr><td><strong>\u03a3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03b1 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2<\/strong><\/td><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b5\u03be\u03b1\u03c1\u03c4\u03ce\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b1\u03ba\u03c1\u03b9\u03b2\u03ae \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd \u03b5\u03bd\u03b4\u03b9\u03b1\u03c6\u03ad\u03c1\u03bf\u03bd\u03c4\u03bf\u03c2. \u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03b1 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c0\u03c1\u03bf\u03ba\u03cd\u03c8\u03bf\u03c5\u03bd \u03bb\u03cc\u03b3\u03c9 \u03b6\u03b7\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03cc\u03c0\u03c9\u03c2 \u03b7 \u03bc\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1 \u03c4\u03b7\u03c2 \u03b1\u03c5\u03c4\u03bf\u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2, \u03b7 \u03c0\u03b1\u03c1\u03b5\u03c1\u03bc\u03b7\u03bd\u03b5\u03af\u03b1 \u03c4\u03c9\u03bd \u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03ae \u03bf\u03b9 \u03b1\u03c3\u03c5\u03bd\u03ad\u03c0\u03b5\u03b9\u03b5\u03c2 \u03c3\u03c4\u03b9\u03c2 \u03bc\u03b5\u03b8\u03cc\u03b4\u03bf\u03c5\u03c2 \u03c3\u03c5\u03bb\u03bb\u03bf\u03b3\u03ae\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03b5\u03c0\u03b7\u03c1\u03b5\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b5\u03bd\u03b4\u03b5\u03c7\u03bf\u03bc\u03ad\u03bd\u03c9\u03c2 \u03c4\u03b7\u03bd \u03b5\u03b3\u03ba\u03c5\u03c1\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03be\u03b9\u03bf\u03c0\u03b9\u03c3\u03c4\u03af\u03b1 \u03c4\u03c9\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03ac\u03c4\u03c9\u03bd \u03c4\u03b7\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2.<\/td><\/tr><tr><td><strong>\u039c\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1 \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae\u03c2<\/strong><\/td><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03c0\u03b9\u03c1\u03c1\u03b5\u03c0\u03b5\u03af\u03c2 \u03c3\u03b5 \u03bc\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1 \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae\u03c2, \u03cc\u03c0\u03bf\u03c5 \u03c4\u03b1 \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03ae \u03bf\u03b9 \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03c6\u03bf\u03c1\u03ad\u03c2 \u03c4\u03bf\u03c5 \u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03bc\u03b7\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03bd\u03c4\u03b9\u03c0\u03c1\u03bf\u03c3\u03c9\u03c0\u03b5\u03c5\u03c4\u03b9\u03ba\u03ac \u03c4\u03bf\u03c5 \u03c3\u03c5\u03bd\u03cc\u03bb\u03bf\u03c5 \u03c4\u03bf\u03c5 \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03bf\u03cd-\u03c3\u03c4\u03cc\u03c7\u03bf\u03c5.<\/td><\/tr><tr><td><strong>\u0388\u03bb\u03bb\u03b5\u03b9\u03c8\u03b7 \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae\u03c2 \u03c4\u03ac\u03be\u03b7\u03c2<\/strong><\/td><td>\u0397 \u03ad\u03bb\u03bb\u03b5\u03b9\u03c8\u03b7 \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae\u03c2 \u03c4\u03ac\u03be\u03b7\u03c2 \u03c3\u03c4\u03b9\u03c2 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03c0\u03b5\u03c1\u03b9\u03bf\u03c1\u03af\u03b6\u03b5\u03b9 \u03c4\u03b7 \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b8\u03bf\u03c1\u03b9\u03c3\u03bc\u03bf\u03cd \u03c4\u03b7\u03c2 \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae\u03c2 \u03b1\u03bb\u03bb\u03b7\u03bb\u03bf\u03c5\u03c7\u03af\u03b1\u03c2 \u03c4\u03c9\u03bd \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c4\u03c9\u03bd, \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03b7 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03cc \u03c4\u03c9\u03bd \u03c3\u03c7\u03ad\u03c3\u03b5\u03c9\u03bd \u03b1\u03b9\u03c4\u03af\u03bf\u03c5-\u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03bf\u03c2.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 id=\"h-cross-sectional-vs-longitudinal-studies\">\u0394\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b5\u03c2 \u03ad\u03bd\u03b1\u03bd\u03c4\u03b9 \u03b4\u03b9\u03b1\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ce\u03bd \u03bc\u03b5\u03bb\u03b5\u03c4\u03ce\u03bd<\/h3>\n\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>\u0394\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b5\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2<\/strong><\/th><th><strong>\u0394\u03b9\u03b1\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2<\/strong><\/th><\/tr><\/thead><tbody><tr><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03c0\u03b1\u03c1\u03b1\u03c4\u03ae\u03c1\u03b7\u03c3\u03b7\u03c2 \u03c0\u03bf\u03c5 \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03c5\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03b1\u03c0\u03cc \u03bc\u03b9\u03b1 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ae \u03bf\u03bc\u03ac\u03b4\u03b1 \u03b1\u03c4\u03cc\u03bc\u03c9\u03bd \u03ae \u03c5\u03c0\u03bf\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03c9\u03bd \u03c3\u03b5 \u03bc\u03b9\u03b1 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03b7 \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae \u03c3\u03c4\u03b9\u03b3\u03bc\u03ae.<\/td><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03c5\u03b8\u03bf\u03cd\u03bd \u03c4\u03bf\u03c5\u03c2 \u03c3\u03c5\u03bc\u03bc\u03b5\u03c4\u03ad\u03c7\u03bf\u03bd\u03c4\u03b5\u03c2 \u03b3\u03b9\u03b1 \u03bc\u03b5\u03b3\u03ac\u03bb\u03bf \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03cc \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1, \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03b5 \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ac \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ac \u03c3\u03b7\u03bc\u03b5\u03af\u03b1.<\/td><\/tr><tr><td>\u03a4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03bc\u03af\u03b1 \u03bc\u03cc\u03bd\u03bf \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae \u03c3\u03c4\u03b9\u03b3\u03bc\u03ae, \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03bd\u03c4\u03b1\u03c2 \u03ad\u03bd\u03b1 \u03c3\u03c4\u03b9\u03b3\u03bc\u03b9\u03cc\u03c4\u03c5\u03c0\u03bf \u03c4\u03bf\u03c5 \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03bf\u03cd.<\/td><td>\u03a4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ac \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ac \u03b4\u03b9\u03b1\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1, \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03b5\u03be\u03ad\u03c4\u03b1\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b1\u03bb\u03bb\u03b1\u03b3\u03ce\u03bd \u03ba\u03b1\u03b9 \u03c4\u03c9\u03bd \u03c4\u03ac\u03c3\u03b5\u03c9\u03bd \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03ac\u03c1\u03bf\u03b4\u03bf \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5.<\/td><\/tr><tr><td>\u039f\u03b9 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b1\u03c5\u03c4\u03ad\u03c2 \u03b1\u03c0\u03bf\u03c3\u03ba\u03bf\u03c0\u03bf\u03cd\u03bd \u03ba\u03c5\u03c1\u03af\u03c9\u03c2 \u03c3\u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03bf\u03c5 \u03b5\u03c0\u03b9\u03c0\u03bf\u03bb\u03b1\u03c3\u03bc\u03bf\u03cd, \u03c4\u03b7\u03c2 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae\u03c2 \u03ae \u03c4\u03c9\u03bd \u03c3\u03c7\u03ad\u03c3\u03b5\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd \u03c3\u03c4\u03bf\u03bd \u03c5\u03c0\u03cc \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7 \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03cc.<\/td><td>\u039f\u03b9 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b1\u03c5\u03c4\u03ad\u03c2 \u03b1\u03c0\u03bf\u03c3\u03ba\u03bf\u03c0\u03bf\u03cd\u03bd \u03c3\u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03bc\u03bf\u03c4\u03af\u03b2\u03c9\u03bd, \u03c4\u03b7\u03c2 \u03c0\u03bf\u03c1\u03b5\u03af\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03c9\u03bd \u03b1\u03b9\u03c4\u03b9\u03c9\u03b4\u03ce\u03bd \u03c3\u03c7\u03ad\u03c3\u03b5\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd, \u03cc\u03c0\u03c9\u03c2 \u03b1\u03c5\u03c4\u03ad\u03c2 \u03b5\u03be\u03b5\u03bb\u03af\u03c3\u03c3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03ac\u03c1\u03bf\u03b4\u03bf \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5.<\/td><\/tr><tr><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03c4\u03b5\u03ba\u03bc\u03b7\u03c1\u03b9\u03ce\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03b1\u03b9\u03c4\u03b9\u03ce\u03b4\u03b7 \u03c3\u03c5\u03bd\u03ac\u03c6\u03b5\u03b9\u03b1 \u03bb\u03cc\u03b3\u03c9 \u03c4\u03b7\u03c2 \u03ad\u03bb\u03bb\u03b5\u03b9\u03c8\u03b7\u03c2 \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae\u03c2 \u03c4\u03ac\u03be\u03b7\u03c2. \u039c\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b5\u03bd\u03c4\u03bf\u03c0\u03af\u03c3\u03bf\u03c5\u03bd \u03c3\u03c5\u03c3\u03c7\u03b5\u03c4\u03af\u03c3\u03b5\u03b9\u03c2 \u03b1\u03bb\u03bb\u03ac \u03cc\u03c7\u03b9 \u03bd\u03b1 \u03ba\u03b1\u03b8\u03bf\u03c1\u03af\u03c3\u03bf\u03c5\u03bd \u03c3\u03c7\u03ad\u03c3\u03b5\u03b9\u03c2 \u03b1\u03b9\u03c4\u03af\u03bf\u03c5-\u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03bf\u03c2.<\/td><td>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03ad\u03c7\u03bf\u03c5\u03bd \u03b9\u03c3\u03c7\u03c5\u03c1\u03cc\u03c4\u03b5\u03c1\u03b7 \u03b9\u03ba\u03b1\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03bd\u03b1 \u03ba\u03b1\u03b8\u03bf\u03c1\u03af\u03c3\u03bf\u03c5\u03bd \u03b1\u03b9\u03c4\u03b9\u03ce\u03b4\u03b5\u03b9\u03c2 \u03c3\u03c7\u03ad\u03c3\u03b5\u03b9\u03c2, \u03ba\u03b1\u03b8\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b1\u03be\u03b9\u03bf\u03bb\u03bf\u03b3\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7 \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae 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\u03b4\u03bf\u03ba\u03b9\u03bc\u03ae \u03c4\u03bf\u03c5 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf\u03c5 \u03c4\u03b7\u03c2 \u03ad\u03c1\u03b5\u03c5\u03bd\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03b5\u03bd\u03c4\u03bf\u03c0\u03b9\u03c3\u03bc\u03cc \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03ce\u03c0\u03b9\u03c3\u03b7 \u03c0\u03b9\u03b8\u03b1\u03bd\u03ce\u03bd \u03c0\u03c1\u03bf\u03b2\u03bb\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd.<\/li>\n\n\n\n<li><strong>\u039c\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1 \u03b1\u03c0\u03cc\u03ba\u03c1\u03b9\u03c3\u03b7\u03c2:<\/strong> \u039f\u03b9 \u03b5\u03c1\u03c9\u03c4\u03b7\u03b8\u03ad\u03bd\u03c4\u03b5\u03c2 \u03b5\u03bd\u03b4\u03ad\u03c7\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03b4\u03ce\u03c3\u03bf\u03c5\u03bd \u03b1\u03bd\u03b1\u03ba\u03c1\u03b9\u03b2\u03b5\u03af\u03c2 \u03ae \u03bc\u03b5\u03c1\u03bf\u03bb\u03b7\u03c0\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b1\u03c0\u03b1\u03bd\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03bb\u03cc\u03b3\u03c9 \u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ba\u03ae\u03c2 \u03b5\u03c0\u03b9\u03b8\u03c5\u03bc\u03af\u03b1\u03c2, \u03b1\u03bd\u03ac\u03ba\u03bb\u03b7\u03c3\u03b7\u03c2 \u03ae \u03bc\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b1\u03c5\u03c4\u03bf\u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac. \u039f\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03b8\u03b1 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03c4\u03b5\u03c7\u03bd\u03b9\u03ba\u03ad\u03c2 \u03cc\u03c0\u03c9\u03c2 \u03b7 \u03b4\u03b9\u03b1\u03c3\u03c6\u03ac\u03bb\u03b9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b1\u03bd\u03c9\u03bd\u03c5\u03bc\u03af\u03b1\u03c2, \u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03bf\u03c5\u03b4\u03ad\u03c4\u03b5\u03c1\u03b7\u03c2 \u03b3\u03bb\u03ce\u03c3\u03c3\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03b7 \u03b1\u03c0\u03bf\u03c6\u03c5\u03b3\u03ae \u03ba\u03b1\u03b8\u03bf\u03b4\u03b7\u03b3\u03b7\u03c4\u03b9\u03ba\u03ce\u03bd \u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03bc\u03b5\u03c4\u03c1\u03b9\u03b1\u03c3\u03bc\u03cc \u03c4\u03b7\u03c2 \u03bc\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1\u03c2 \u03c4\u03c9\u03bd \u03b1\u03c0\u03b1\u03bd\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd.<\/li>\n\n\n\n<li><strong>\u039c\u03b7 \u03b1\u03c0\u03ac\u03bd\u03c4\u03b7\u03c3\u03b7:<\/strong> \u0397 \u03bc\u03b7 \u03b1\u03bd\u03c4\u03b1\u03c0\u03cc\u03ba\u03c1\u03b9\u03c3\u03b7 \u03c3\u03c5\u03bc\u03b2\u03b1\u03af\u03bd\u03b5\u03b9 \u03cc\u03c4\u03b1\u03bd \u03b5\u03c0\u03b9\u03bb\u03b5\u03b3\u03bc\u03ad\u03bd\u03bf\u03b9 \u03c3\u03c5\u03bc\u03bc\u03b5\u03c4\u03ad\u03c7\u03bf\u03bd\u03c4\u03b5\u03c2 \u03b1\u03c1\u03bd\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03c3\u03c5\u03bc\u03bc\u03b5\u03c4\u03ac\u03c3\u03c7\u03bf\u03c5\u03bd \u03ae \u03b4\u03b5\u03bd \u03b1\u03c0\u03b1\u03bd\u03c4\u03bf\u03cd\u03bd \u03c3\u03c4\u03b7\u03bd \u03ad\u03c1\u03b5\u03c5\u03bd\u03b1. \u03a4\u03b1 \u03c5\u03c8\u03b7\u03bb\u03ac \u03c0\u03bf\u03c3\u03bf\u03c3\u03c4\u03ac \u03bc\u03b7 \u03b1\u03bd\u03c4\u03b1\u03c0\u03cc\u03ba\u03c1\u03b9\u03c3\u03b7\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b5\u03b9\u03c3\u03ac\u03b3\u03bf\u03c5\u03bd \u03bc\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1 \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae\u03c2 \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03b8\u03ad\u03c3\u03bf\u03c5\u03bd \u03c3\u03b5 \u03ba\u03af\u03bd\u03b4\u03c5\u03bd\u03bf \u03c4\u03b7\u03bd \u03b1\u03bd\u03c4\u03b9\u03c0\u03c1\u03bf\u03c3\u03c9\u03c0\u03b5\u03c5\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03bf\u03c5 \u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2. \u039f\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b1\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03c9\u03c0\u03af\u03c3\u03bf\u03c5\u03bd \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03b6\u03ae\u03c4\u03b7\u03bc\u03b1 \u03bc\u03ad\u03c3\u03c9 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2, \u03c5\u03c0\u03b5\u03bd\u03b8\u03c5\u03bc\u03af\u03c3\u03b5\u03c9\u03bd \u03ba\u03b1\u03b9 \u03ba\u03b9\u03bd\u03ae\u03c4\u03c1\u03c9\u03bd \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03bd\u03b8\u03ac\u03c1\u03c1\u03c5\u03bd\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c3\u03c5\u03bc\u03bc\u03b5\u03c4\u03bf\u03c7\u03ae\u03c2.<\/li>\n\n\n\n<li><strong>\u039c\u03ad\u03b3\u03b5\u03b8\u03bf\u03c2 \u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2<\/strong>: \u03a4\u03bf \u03b5\u03c0\u03b1\u03c1\u03ba\u03ad\u03c2 \u03bc\u03ad\u03b3\u03b5\u03b8\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2 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\u03b1\u03b9\u03c4\u03af\u03bf\u03c5-\u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ae \u03c4\u03bf\u03bd \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03cc \u03c4\u03bf\u03c5 \u03b1\u03bd \u03b7 \u03ad\u03ba\u03b8\u03b5\u03c3\u03b7 \u03ae \u03c4\u03bf \u03b1\u03c0\u03bf\u03c4\u03ad\u03bb\u03b5\u03c3\u03bc\u03b1 \u03c3\u03c5\u03bd\u03ad\u03b2\u03b7\u03c3\u03b1\u03bd \u03c0\u03c1\u03ce\u03c4\u03b1.<\/li>\n\n\n\n<li><strong>\u0394\u03c5\u03bd\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03c1\u03bf\u03c6\u03b7\u03c2 \u03b1\u03b9\u03c4\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2<\/strong>: \u03a3\u03b5 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03ae\u03c2, \u03bf\u03b9 \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b5\u03c2 \u03c3\u03c5\u03c3\u03c7\u03b5\u03c4\u03af\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd 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\u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03c1\u03bf\u03c6\u03bf.<\/li>\n\n\n\n<li><strong>\u039c\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1 \u03ba\u03b1\u03b9 \u03c3\u03cd\u03b3\u03c7\u03c5\u03c3\u03b7: <\/strong>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03c0\u03b9\u03c1\u03c1\u03b5\u03c0\u03b5\u03af\u03c2 \u03c3\u03b5 \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03b1, \u03cc\u03c0\u03c9\u03c2 \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03b1 \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae\u03c2, \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03b1 \u03b1\u03bd\u03ac\u03ba\u03bb\u03b7\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03b1 \u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2. \u0391\u03c5\u03c4\u03ad\u03c2 \u03bf\u03b9 \u03bc\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b5\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b5\u03c0\u03b7\u03c1\u03b5\u03ac\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b5\u03b3\u03ba\u03c5\u03c1\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03c9\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03ac\u03c4\u03c9\u03bd \u03c4\u03b7\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2. \u0395\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd, \u03bf\u03b9 \u03c3\u03c5\u03b3\u03c7\u03c5\u03c4\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ad\u03c2 \u03c0\u03bf\u03c5 \u03b4\u03b5\u03bd \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c5\u03c0\u03cc\u03c8\u03b7 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03c0\u03b7\u03c1\u03b5\u03ac\u03c3\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b5\u03c2 \u03c3\u03c5\u03c3\u03c7\u03b5\u03c4\u03af\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd.<\/li>\n\n\n\n<li><strong>\u0391\u03b4\u03c5\u03bd\u03b1\u03bc\u03af\u03b1 \u03b1\u03be\u03b9\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7\u03c2 \u03c4\u03c9\u03bd \u03b1\u03bb\u03bb\u03b1\u03b3\u03ce\u03bd \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03ac\u03c1\u03bf\u03b4\u03bf \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5: <\/strong>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b4\u03b5\u03bd \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03c5\u03bd \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ac \u03bc\u03b5 \u03b1\u03bb\u03bb\u03b1\u03b3\u03ad\u03c2 \u03ae \u03c4\u03ac\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03ac\u03c1\u03bf\u03b4\u03bf \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5 \u03b5\u03bd\u03c4\u03cc\u03c2 \u03b1\u03c4\u03cc\u03bc\u03c9\u03bd \u03ae \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03ce\u03bd. \u039f \u03c0\u03b5\u03c1\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03cc\u03c2 \u03b1\u03c5\u03c4\u03cc\u03c2 \u03c0\u03b5\u03c1\u03b9\u03bf\u03c1\u03af\u03b6\u03b5\u03b9 \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03ae \u03c4\u03b7\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c4\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd \u03ba\u03b1\u03b9 \u03c4\u03c9\u03bd \u03bc\u03b1\u03ba\u03c1\u03bf\u03c0\u03c1\u03cc\u03b8\u03b5\u03c3\u03bc\u03c9\u03bd \u03c0\u03c1\u03bf\u03c4\u03cd\u03c0\u03c9\u03bd \u03c4\u03bf\u03c5\u03c2.<\/li>\n\n\n\n<li><strong>\u03a0\u03b5\u03c1\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03b7 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\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03c9\u03bd \u03ae \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03c6\u03bf\u03c1\u03ce\u03bd \u03c3\u03b5 \u03ad\u03bd\u03b1\u03bd \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03cc. \u03a0\u03b1\u03c1\u03ad\u03c7\u03bf\u03c5\u03bd \u03b5\u03ba\u03c4\u03b9\u03bc\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03b7\u03c2 \u03b5\u03c0\u03b9\u03b2\u03ac\u03c1\u03c5\u03bd\u03c3\u03b7\u03c2 \u03b1\u03c0\u03cc \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03b1 \u03b6\u03b7\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c5\u03b3\u03b5\u03af\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b2\u03bf\u03b7\u03b8\u03ae\u03c3\u03bf\u03c5\u03bd \u03c3\u03c4\u03bf\u03bd \u03b5\u03bd\u03c4\u03bf\u03c0\u03b9\u03c3\u03bc\u03cc \u03bf\u03bc\u03ac\u03b4\u03c9\u03bd \u03ae \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03ce\u03bd \u03c5\u03c8\u03b7\u03bb\u03bf\u03cd \u03ba\u03b9\u03bd\u03b4\u03cd\u03bd\u03bf\u03c5.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03b9\u03c4\u03ae\u03c1\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03b7\u03bc\u03cc\u03c3\u03b9\u03b1\u03c2 \u03c5\u03b3\u03b5\u03af\u03b1\u03c2:<\/strong> \u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c4\u03ae\u03c1\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03b7\u03bc\u03cc\u03c3\u03b9\u03b1\u03c2 \u03c5\u03b3\u03b5\u03af\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03b5\u03c0\u03b9\u03c0\u03bf\u03bb\u03b1\u03c3\u03bc\u03bf\u03cd \u03b1\u03c3\u03b8\u03b5\u03bd\u03b5\u03b9\u03ce\u03bd \u03ae \u03c0\u03b1\u03c1\u03b1\u03b3\u03cc\u03bd\u03c4\u03c9\u03bd \u03ba\u03b9\u03bd\u03b4\u03cd\u03bd\u03bf\u03c5 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03ac\u03c1\u03bf\u03b4\u03bf \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5. \u0392\u03bf\u03b7\u03b8\u03bf\u03cd\u03bd \u03c3\u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b1\u03bb\u03bb\u03b1\u03b3\u03ce\u03bd \u03c3\u03c4\u03bf\u03c5\u03c2 \u03b4\u03b5\u03af\u03ba\u03c4\u03b5\u03c2 \u03c5\u03b3\u03b5\u03af\u03b1\u03c2, \u03c3\u03c4\u03b7\u03bd \u03b5\u03bd\u03b7\u03bc\u03ad\u03c1\u03c9\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03bf\u03cd \u03c4\u03b7\u03c2 \u03b4\u03b7\u03bc\u03cc\u03c3\u03b9\u03b1\u03c2 \u03c5\u03b3\u03b5\u03af\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd \u03b1\u03be\u03b9\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03b1\u03bd\u03c4\u03af\u03ba\u03c4\u03c5\u03c0\u03bf\u03c5 \u03c4\u03c9\u03bd \u03c0\u03b1\u03c1\u03b5\u03bc\u03b2\u03ac\u03c3\u03b5\u03c9\u03bd.<\/li>\n\n\n\n<li><strong>\u0388\u03c1\u03b5\u03c5\u03bd\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03b9\u03c2 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03af\u03b5\u03c2 \u03c5\u03b3\u03b5\u03af\u03b1\u03c2:<\/strong> \u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03c3\u03c4\u03bf\u03cd\u03bd \u03c3\u03c4\u03b7\u03bd \u03ad\u03c1\u03b5\u03c5\u03bd\u03b1 \u03c4\u03c9\u03bd \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd \u03c5\u03b3\u03b5\u03af\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b1\u03be\u03b9\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c7\u03c1\u03ae\u03c3\u03b7\u03c2 \u03c4\u03b7\u03c2 \u03c5\u03b3\u03b5\u03b9\u03bf\u03bd\u03bf\u03bc\u03b9\u03ba\u03ae\u03c2 \u03c0\u03b5\u03c1\u03af\u03b8\u03b1\u03bb\u03c8\u03b7\u03c2, \u03c4\u03b7\u03c2 \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03c2 \u03c0\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03c0\u03b5\u03c1\u03af\u03b8\u03b1\u03bb\u03c8\u03b7\u03c2. \u039f\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b5\u03be\u03b5\u03c4\u03ac\u03c3\u03bf\u03c5\u03bd \u03c0\u03b1\u03c1\u03ac\u03b3\u03bf\u03bd\u03c4\u03b5\u03c2 \u03cc\u03c0\u03c9\u03c2 \u03bf\u03b9 \u03b1\u03bd\u03b9\u03c3\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03c3\u03c4\u03b7\u03bd \u03c5\u03b3\u03b5\u03b9\u03bf\u03bd\u03bf\u03bc\u03b9\u03ba\u03ae \u03c0\u03b5\u03c1\u03af\u03b8\u03b1\u03bb\u03c8\u03b7, \u03b7 \u03b9\u03ba\u03b1\u03bd\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b1\u03c3\u03b8\u03b5\u03bd\u03ce\u03bd \u03ae \u03c4\u03b1 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1 \u03c4\u03b7\u03c2 \u03c5\u03b3\u03b5\u03b9\u03bf\u03bd\u03bf\u03bc\u03b9\u03ba\u03ae\u03c2 \u03c0\u03b5\u03c1\u03af\u03b8\u03b1\u03bb\u03c8\u03b7\u03c2 \u03c3\u03b5 \u03ad\u03bd\u03b1\u03bd \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03bf \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03cc.<\/li>\n\n\n\n<li><strong>\u0394\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03c5\u03c0\u03bf\u03b8\u03ad\u03c3\u03b5\u03c9\u03bd:<\/strong> \u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c5\u03c7\u03bd\u03ac \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03c5\u03c0\u03bf\u03b8\u03ad\u03c3\u03b5\u03c9\u03bd \u03b3\u03b9\u03b1 \u03c0\u03b5\u03c1\u03b1\u03b9\u03c4\u03ad\u03c1\u03c9 \u03ad\u03c1\u03b5\u03c5\u03bd\u03b1. \u0395\u03bd\u03c4\u03bf\u03c0\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c3\u03c5\u03c3\u03c7\u03b5\u03c4\u03af\u03c3\u03b5\u03b9\u03c2 \u03ae \u03c3\u03c7\u03ad\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd, \u03bf\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03ae\u03c3\u03bf\u03c5\u03bd \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03b9\u03ba\u03ac \u03b5\u03c1\u03c9\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03c3\u03c7\u03b5\u03b4\u03b9\u03ac\u03c3\u03bf\u03c5\u03bd \u03c0\u03b9\u03bf \u03b5\u03bc\u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03b1\u03c4\u03c9\u03bc\u03ad\u03bd\u03b5\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2, \u03cc\u03c0\u03c9\u03c2 \u03b4\u03b9\u03b1\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03ae \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2, \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b4\u03b9\u03b5\u03c1\u03b5\u03c5\u03bd\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03b1\u03b9\u03c4\u03b9\u03ce\u03b4\u03b5\u03b9\u03c2 \u03c3\u03c7\u03ad\u03c3\u03b5\u03b9\u03c2.<\/li>\n\n\n\n<li><strong>\u03a3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03cc\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03be\u03b9\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7 \u03c0\u03bf\u03bb\u03b9\u03c4\u03b9\u03ba\u03ae\u03c2: <\/strong>\u039f\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03c5\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03c4\u03b5\u03ba\u03bc\u03b7\u03c1\u03b9\u03c9\u03bc\u03ad\u03bd\u03bf 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\u03b3\u03b9\u03b1 \u03c0\u03b1\u03c1\u03ad\u03bc\u03b2\u03b1\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03b1\u03be\u03b9\u03bf\u03bb\u03bf\u03b3\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03c9\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b6\u03cc\u03bc\u03b5\u03bd\u03c9\u03bd \u03c0\u03bf\u03bb\u03b9\u03c4\u03b9\u03ba\u03ce\u03bd \u03ae \u03c0\u03b1\u03c1\u03b5\u03bc\u03b2\u03ac\u03c3\u03b5\u03c9\u03bd.<\/li>\n<\/ol>\n\n\n\n<h3 id=\"h-when-to-use-cross-sectional-studies\">\u03a0\u03cc\u03c4\u03b5 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b5 \u03b4\u03b9\u03b1\u03c3\u03c4\u03b1\u03c5\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b5\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2<\/h3>\n\n\n\n<ul>\n<li>\u039a\u03b1\u03c4\u03ac \u03c4\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7 \u03c4\u03bf\u03c5 \u03b5\u03c0\u03b9\u03c0\u03bf\u03bb\u03b1\u03c3\u03bc\u03bf\u03cd \u03ba\u03b1\u03b9 \u03c4\u03b7\u03c2 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae\u03c2 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03c9\u03bd \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ce\u03bd, \u03b1\u03c3\u03b8\u03b5\u03bd\u03b5\u03b9\u03ce\u03bd \u03ae \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03c6\u03bf\u03c1\u03ce\u03bd \u03c3\u03b5 \u03ad\u03bd\u03b1\u03bd \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03cc.<\/li>\n\n\n\n<li>\u039a\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03b5\u03c1\u03b5\u03cd\u03bd\u03b7\u03c3\u03b7 \u03c3\u03c5\u03c3\u03c7\u03b5\u03c4\u03af\u03c3\u03b5\u03c9\u03bd \u03ae \u03c3\u03c7\u03ad\u03c3\u03b5\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd \u03b5\u03bd\u03b4\u03b9\u03b1\u03c6\u03ad\u03c1\u03bf\u03bd\u03c4\u03bf\u03c2.<\/li>\n\n\n\n<li>\u039a\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03b5\u03c1\u03b5\u03cd\u03bd\u03b7\u03c3\u03b7 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03ce\u03bd \u03ae \u03bf\u03bc\u03bf\u03b9\u03bf\u03c4\u03ae\u03c4\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ce\u03bd \u03bf\u03bc\u03ac\u03b4\u03c9\u03bd \u03ae \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03ce\u03bd.<\/li>\n\n\n\n<li>\u038c\u03c4\u03b1\u03bd \u03bf \u03c7\u03c1\u03cc\u03bd\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03bf\u03b9 \u03c0\u03cc\u03c1\u03bf\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03b5\u03c1\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf\u03b9 \u03c3\u03b5 \u03c3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03bc\u03b5 \u03b4\u03b9\u03b1\u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ac \u03ae \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03c3\u03c7\u03ad\u03b4\u03b9\u03b1 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2.<\/li>\n\n\n\n<li>\u039a\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03c5\u03c0\u03bf\u03b8\u03ad\u03c3\u03b5\u03c9\u03bd \u03b3\u03b9\u03b1 \u03c0\u03b5\u03c1\u03b1\u03b9\u03c4\u03ad\u03c1\u03c9 \u03ad\u03c1\u03b5\u03c5\u03bd\u03b1 \u03ae \u03b5\u03bd\u03b7\u03bc\u03ad\u03c1\u03c9\u03c3\u03b7 \u03b3\u03b9\u03b1 \u03b1\u03c0\u03bf\u03c6\u03ac\u03c3\u03b5\u03b9\u03c2 \u03c0\u03bf\u03bb\u03b9\u03c4\u03b9\u03ba\u03ae\u03c2.<\/li>\n\n\n\n<li>\u038c\u03c4\u03b1\u03bd \u03b5\u03c0\u03b9\u03b4\u03b9\u03ce\u03ba\u03b5\u03c4\u03b1\u03b9 \u03b7 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03b7\u03c2 \u03c4\u03c1\u03ad\u03c7\u03bf\u03c5\u03c3\u03b1\u03c2 \u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5 \u03b6\u03b7\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ae \u03bc\u03b9\u03b1\u03c2 \u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7\u03c2.<\/li>\n<\/ul>\n\n\n\n<p>\u0395\u03bd \u03ba\u03b1\u03c4\u03b1\u03ba\u03bb\u03b5\u03af\u03b4\u03b9, \u03bf\u03b9 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b5\u03b1\u03ba\u03ad\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b4\u03b9\u03b1\u03b4\u03c1\u03b1\u03bc\u03b1\u03c4\u03af\u03b6\u03bf\u03c5\u03bd \u03ba\u03c1\u03af\u03c3\u03b9\u03bc\u03bf \u03c1\u03cc\u03bb\u03bf \u03c3\u03b5 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03bf\u03c5\u03c2 \u03c4\u03bf\u03bc\u03b5\u03af\u03c2 \u03c4\u03b7\u03c2 \u03ad\u03c1\u03b5\u03c5\u03bd\u03b1\u03c2, \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c0\u03bf\u03bb\u03cd\u03c4\u03b9\u03bc\u03b5\u03c2 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03b5\u03c0\u03b9\u03c0\u03bf\u03bb\u03b1\u03c3\u03bc\u03cc, \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03c3\u03c5\u03c3\u03c7\u03b5\u03c4\u03af\u03c3\u03b5\u03b9\u03c2 \u03c4\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ce\u03bd \u03c3\u03b5 \u03ad\u03bd\u03b1\u03bd \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03cc.&nbsp;<\/p>\n\n\n\n<p>\u039c\u03b5 \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c4\u03c9\u03bd \u03bc\u03b5\u03b9\u03bf\u03bd\u03b5\u03ba\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03c4\u03c9\u03bd \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03b9\u03ba\u03ce\u03bd \u03bc\u03b5\u03bb\u03b5\u03c4\u03ce\u03bd, \u03bf\u03b9 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03ad\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03bc\u03b5\u03b3\u03b9\u03c3\u03c4\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b1\u03c5\u03c4\u03ce\u03bd \u03c4\u03c9\u03bd \u03bc\u03b5\u03bb\u03b5\u03c4\u03ce\u03bd \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03c9\u03bd \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ce\u03bd \u03c4\u03bf\u03c5 \u03c0\u03bb\u03b7\u03b8\u03c5\u03c3\u03bc\u03bf\u03cd, \u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b4\u03b5\u03b9\u03ba\u03c4\u03ce\u03bd \u03c5\u03b3\u03b5\u03af\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b5\u03bd\u03b7\u03bc\u03ad\u03c1\u03c9\u03c3\u03b7 \u03b3\u03b9\u03b1 \u03c0\u03b1\u03c1\u03b5\u03bc\u03b2\u03ac\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b7\u03bc\u03cc\u03c3\u03b9\u03b1\u03c2 \u03c5\u03b3\u03b5\u03af\u03b1\u03c2.<\/p>\n\n\n\n<h2 id=\"h-improve-your-papers-impact-and-visibility-through-quality-visual-communication\">\u0392\u03b5\u03bb\u03c4\u03b9\u03ce\u03c3\u03c4\u03b5 \u03c4\u03bf\u03bd \u03b1\u03bd\u03c4\u03af\u03ba\u03c4\u03c5\u03c0\u03bf \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03c0\u03c1\u03bf\u03b2\u03bf\u03bb\u03ae \u03c4\u03c9\u03bd \u03b5\u03b3\u03b3\u03c1\u03ac\u03c6\u03c9\u03bd \u03c3\u03b1\u03c2 \u03bc\u03ad\u03c3\u03c9 \u03c4\u03b7\u03c2 \u03c0\u03bf\u03b9\u03bf\u03c4\u03b9\u03ba\u03ae\u03c2 \u03bf\u03c0\u03c4\u03b9\u03ba\u03ae\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2<\/h2>\n\n\n\n<p>\u0391\u03bd \u03c3\u03b1\u03c2 \u03bb\u03ad\u03b3\u03b1\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03b2\u03b5\u03bb\u03c4\u03b9\u03ce\u03c3\u03b5\u03c4\u03b5 \u03c4\u03bf\u03bd \u03b1\u03bd\u03c4\u03af\u03ba\u03c4\u03c5\u03c0\u03bf \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03c0\u03c1\u03bf\u03b2\u03bf\u03bb\u03ae \u03c4\u03c9\u03bd \u03b5\u03b3\u03b3\u03c1\u03ac\u03c6\u03c9\u03bd \u03c3\u03b1\u03c2 \u03bc\u03ad\u03c3\u03c9 \u03c4\u03b7\u03c2 \u03c0\u03bf\u03b9\u03bf\u03c4\u03b9\u03ba\u03ae\u03c2 \u03bf\u03c0\u03c4\u03b9\u03ba\u03ae\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2, \u03b8\u03b1 \u03b8\u03ad\u03bb\u03b1\u03c4\u03b5 \u03bd\u03b1 \u03bc\u03ac\u03b8\u03b5\u03c4\u03b5 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03b1; \u0391\u03bd \u03b5\u03af\u03c3\u03c4\u03b5 \u03c3\u03bf\u03b2\u03b1\u03c1\u03bf\u03af \u03bc\u03b5 \u03c4\u03b7\u03bd \u03ad\u03c1\u03b5\u03c5\u03bd\u03ac \u03c3\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03b8\u03ad\u03bb\u03b5\u03c4\u03b5 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03b4\u03ce\u03c3\u03b5\u03c4\u03b5 \u03c4\u03bf \u03b8\u03ad\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03ad\u03c1\u03b5\u03c5\u03bd\u03ac\u03c2 \u03c3\u03b1\u03c2 \u03c3\u03c4\u03bf \u03ba\u03bf\u03b9\u03bd\u03cc-\u03c3\u03c4\u03cc\u03c7\u03bf \u03c3\u03b1\u03c2, \u03c3\u03af\u03b3\u03bf\u03c5\u03c1\u03b1 \u03b8\u03b1 \u03c4\u03bf \u03b8\u03ad\u03bb\u03b1\u03c4\u03b5. \u039f\u03c0\u03cc\u03c4\u03b5 \u03b5\u03b4\u03ce \u03ad\u03c1\u03c7\u03b5\u03c4\u03b1\u03b9 \u03c4\u03bf \u03bc\u03c5\u03c3\u03c4\u03b9\u03ba\u03cc \u03bc\u03b1\u03c2 - <a href=\"https:\/\/mindthegraph.com\" target=\"_blank\" rel=\"noreferrer noopener\">Mind the Graph<\/a>. \u0395\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03c0\u03bf\u03c5 \u03c3\u03b1\u03c2 \u03b2\u03bf\u03b7\u03b8\u03ac \u03bd\u03b1 \u03b5\u03bd\u03b9\u03c3\u03c7\u03cd\u03c3\u03b5\u03c4\u03b5 \u03c4\u03b9\u03c2 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c3\u03b1\u03c2 \u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b5\u03c2, \u03c4\u03b9\u03c2 \u03b1\u03c6\u03af\u03c3\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03c3\u03b5\u03b9\u03c2 \u03c3\u03b1\u03c2 \u03bc\u03b5 infographics \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03ba\u03b1\u03b8\u03b9\u03c3\u03c4\u03ac \u03b5\u03cd\u03ba\u03bf\u03bb\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03b7\u03c4\u03ad\u03c2. \u0395\u03b3\u03b3\u03c1\u03b1\u03c6\u03b5\u03af\u03c4\u03b5 \u03c4\u03ce\u03c1\u03b1 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b5\u03be\u03b5\u03c1\u03b5\u03c5\u03bd\u03ae\u03c3\u03b5\u03c4\u03b5 \u03c4\u03b1 \u03b3\u03c1\u03b1\u03c6\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03b5\u03af\u03c3\u03c4\u03b5 \u03ac\u03c1\u03b9\u03c3\u03c4\u03bf\u03b9 \u03c3\u03c4\u03bf \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03b9\u03ba\u03cc \u03c3\u03b1\u03c2 \u03c4\u03b1\u03be\u03af\u03b4\u03b9.<\/p>\n\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"517\" height=\"250\" src=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2023\/03\/illustrations-banner.webp\" alt=\"\" class=\"wp-image-27276\" srcset=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2023\/03\/illustrations-banner.webp 517w, https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2023\/03\/illustrations-banner-300x145.webp 300w, https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2023\/03\/illustrations-banner-18x9.webp 18w, https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2023\/03\/illustrations-banner-100x48.webp 100w\" sizes=\"(max-width: 517px) 100vw, 517px\" \/><\/figure><\/div>\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"is-layout-flex wp-block-buttons\">\n<div class=\"wp-block-button aligncenter\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/mindthegraph.com\/app\/offer-trial\" style=\"border-radius:50px;background-color:#dc1866\" target=\"_blank\" rel=\"noreferrer noopener\">\u039e\u03b5\u03ba\u03b9\u03bd\u03ae\u03c3\u03c4\u03b5 \u03bd\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af\u03c4\u03b5 Infographics \u03b4\u03c9\u03c1\u03b5\u03ac\u03bd<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:44px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>","protected":false},"excerpt":{"rendered":"<p>\u0392\u03c5\u03b8\u03b9\u03c3\u03c4\u03b5\u03af\u03c4\u03b5 \u03b2\u03b1\u03b8\u03cd\u03c4\u03b5\u03c1\u03b1 \u03c3\u03c4\u03b9\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b5\u03c2 \u03b4\u03b9\u03b1\u03c4\u03bf\u03bc\u03ae\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03c0\u03bf\u03ba\u03b1\u03bb\u03cd\u03c8\u03c4\u03b5 \u03c4\u03b1 \u03c0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03bc\u03b5\u03b9\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03bc\u03ac\u03b8\u03b5\u03c4\u03b5 \u03b1\u03bd \u03b1\u03c5\u03c4\u03cc\u03c2 \u03bf \u03c4\u03cd\u03c0\u03bf\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b9\u03c2 \u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c3\u03b1\u03c2 \u03b1\u03bd\u03ac\u03b3\u03ba\u03b5\u03c2.<\/p>","protected":false},"author":33,"featured_media":28524,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[959,28],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Mapping the Present: Exploring Cross-Sectional Study Pros and Cons - Mind the Graph Blog<\/title>\n<meta name=\"description\" content=\"Dive deeper into cross-sectional studies and uncover the pros and cons to find out if this type of study is suitable for your research needs.\" \/>\n<meta name=\"robots\" content=\"index, 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