记录
-
A/(A+B)≈A/B
C/(C+D)≈C/D
RR=(A/(A+B))/(C/(C+D))≈(A/B)/(C/D)=AD/BC=OR
手机版|会员|至尊|接种|公卫人 ( 沪ICP备06060850号-3 )
GMT+8, 2024-4-29 08:38 , Processed in 0.023364 second(s), 2 queries , Gzip On, MemCached On.
Powered by Discuz! X3.4
© 2001-2023 Discuz! Team.