短語(yǔ)詞組短語(yǔ)ageing cohorts 老齡人群California cohorts 加州同伙;加州組群;加利福尼亞同期組群Synthetic Cohorts 合成同伙cohorts force 二age cohorts 年齡分組generational cohorts 代組群;代同伙propensity matched cohorts 傾向匹配隊(duì)列Seven Countries Studies cohorts 對(duì)七國(guó)研究組survival cohorts bias 存活隊(duì)列偏倚cohort study 隊(duì)列研究；世代研究；定群研究；斷代研究；同期群研究retrospective cohort study 回顧性隊(duì)列研究；回顧性隊(duì)列調(diào)查 返回 cohorts