A.Scare Acute Respiratory Syndrome B.Scare Acute Respiratory Symptom C.Severe Acute Respiratory Syndrome D.Severe Acute Respiratory Symptom E.Severe Acute Respiratory Symptoms
A.可在多個(gè)醫(yī)院選擇病例 B.可在病例同一科室中選擇對(duì)照 C.可在社區(qū)人群中選擇對(duì)照 D.性別、年齡常起混雜作用,可作為匹配條件 E.對(duì)于飲酒與喝茶所起的作用,可做分層分析
A.選擇偏倚 B.錯(cuò)分偏倚 C.回憶偏倚 D.失訪偏倚 E.混雜偏倚