《预防医学》 附表31-1　两样本率比较时所需样本含量（单侧）

上行：α=0.05,1-β=0.80

中行：α=0.05,1-β=0.90

下行：α=0.05,1-β=0.95

较小率（%）δ=两组率之差（%）510152025303540455055606570533010555352520161311987664601457648342621171513119878502701408963473730252119171413105401557647322319151311987674021010564443325211714121198137039019512081604637302521191614157102009456382721171412108769902701307752382922191613101081820500240145966952413327222017142086023011063423022181512108761190320150885841312420161411108219059028016010576574435282320171425980260120694532241915121087-13603601659663443325211614119-25106603001751158160463629232016-30108028013073473324191512108--15003901751006546332521161311--276072033018512084614736282219--351160300135754833241915129---160041018510567463325201612---2960750340190125856146352721---40121031013576483324181411----1670420190105674633241914----30807803501951258460443325----451230310135754732221713-----17104301901056544312217-----314079035019012081574130-----5012303101357345302115------171042018510063412921------3140780340185115765237------