{"id":3064,"date":"2026-10-12T08:00:00","date_gmt":"2026-10-12T01:00:00","guid":{"rendered":"https:\/\/dykhoa.com\/blog\/?post_type=thuat_ngu&p=3063"},"modified":"2026-10-12T08:00:00","modified_gmt":"2026-10-12T01:00:00","slug":"thien-vi-lua-chon-selection-bias","status":"publish","type":"thuat_ngu","link":"https:\/\/dykhoa.com\/blog\/thuat-ngu\/thien-vi-lua-chon-selection-bias\/","title":{"rendered":"Thi\u00ean v\u1ecb l\u1ef1a ch\u1ecdn (selection bias) l\u00e0 g\u00ec?"},"content":{"rendered":"

Thi\u00ean v\u1ecb l\u1ef1a ch\u1ecdn l\u00e0m sai l\u1ec7ch k\u1ebft qu\u1ea3 ngay t\u1eeb tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u thu th\u1eadp s\u1ed1 li\u1ec7u (Hern\u00e1n et al., 2004). Xem b\u00e0i vi\u1ebft Ki\u1ec3m tra nghi\u00ean c\u1ee9u chia s\u1ebb tr\u00ean m\u1ea1ng<\/a>.<\/p>\n

C\u00e1c d\u1ea1ng th\u01b0\u1eddng g\u1eb7p<\/h2>\n

– Thi\u00ean v\u1ecb ng\u01b0\u1eddi t\u00ecnh nguy\u1ec7n (Volunteer bias): Nh\u1eefng ng\u01b0\u1eddi t\u1ef1 nguy\u1ec7n tham gia th\u1eed nghi\u1ec7m th\u01b0\u1eddng c\u00f3 \u00fd th\u1ee9c s\u1ed1ng l\u00e0nh m\u1ea1nh h\u01a1n ng\u01b0\u1eddi b\u00ecnh th\u01b0\u1eddng.
– Thi\u00ean v\u1ecb ng\u01b0\u1eddi s\u1ed1ng s\u00f3t (Survivorship bias): Ch\u1ec9 nghi\u00ean c\u1ee9u c\u00e1c b\u1ec7nh nh\u00e2n c\u00f2n s\u1ed1ng \u0111\u1ebfn th\u1eddi \u0111i\u1ec3m kh\u1ea3o s\u00e1t, b\u1ecf qua nh\u1eefng ng\u01b0\u1eddi b\u1ec7nh n\u1eb7ng \u0111\u00e3 qua \u0111\u1eddi.<\/p>\n

Gi\u1ea3i ph\u00e1p kh\u1eafc ph\u1ee5c<\/h2>\n

L\u1ef1a ch\u1ecdn m\u1eabu ng\u1eabu nhi\u00ean x\u00e1c su\u1ea5t v\u00e0 tuy\u1ec3n \u0111\u1ed1i t\u01b0\u1ee3ng t\u1eeb nhi\u1ec1u ngu\u1ed3n c\u1ed9ng \u0111\u1ed3ng \u0111a d\u1ea1ng.<\/p>\n","protected":false},"excerpt":{"rendered":"

Thi\u00ean v\u1ecb l\u1ef1a ch\u1ecdn l\u00e0 sai l\u1ec7ch mang t\u00ednh h\u1ec7 th\u1ed1ng x\u1ea3y ra trong c\u00e1ch th\u1ee9c l\u1ef1a ch\u1ecdn \u0111\u1ed1i t\u01b0\u1ee3ng tham gia nghi\u00ean c\u1ee9u, khi\u1ebfn m\u1eabu kh\u1ea3o s\u00e1t kh\u00f4ng \u0111\u1ea1i di\u1ec7n ch\u00ednh x\u00e1c cho qu\u1ea7n th\u1ec3 m\u1ee5c ti\u00eau.<\/p>\n","protected":false},"author":1,"featured_media":0,"template":"","nhom_thuat_ngu":[476],"class_list":["post-3064","thuat_ngu","type-thuat_ngu","status-publish","hentry","nhom_thuat_ngu-nghien-cuu-bang-chung"],"yoast_head":"\nThi\u00ean v\u1ecb l\u1ef1a ch\u1ecdn (selection bias) l\u00e0 g\u00ec? - Dy Khoa Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dykhoa.com\/blog\/thuat-ngu\/thien-vi-lua-chon-selection-bias\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Thi\u00ean v\u1ecb l\u1ef1a ch\u1ecdn (selection bias) l\u00e0 g\u00ec? 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