当某种因素与疾病无关联时( )。A、RR=0B、RR>0C、RR1E、RR=1 当某种因素与疾病无关联时( )。A、RR=0B、RR>0C、RR<1D、RR>1E、RR=1
当某种因素与疾病无关联时( )。A、RR=0B、RR>0C、RR<1D、RR>1E、RR=1
当某种因素与疾病无关联时( )。
A、RR=0
B、RR>0
C、RR<1
D、RR>1
E、RR=1
相关考题:
当暴露是疾病发生的保护因素时()A.RR=1B.RR=0C.RR<1D.RR>1