A comparison of formulae for calculating cost-efficient sample sizes of case-control studies with an internal validation scheme

被引:0
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作者
Rippin, G [1 ]
机构
[1] Univ Mainz, Inst Med Stat & Dokumentat, D-55131 Mainz, Germany
关键词
case-control study; sample size; cost-efficient design; internal validation;
D O I
暂无
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
When a case-control study is planned to include an internal validation study, the sample size of the study and the proportion of validated observations has to be calculated. There are a Variety of alternative methods to accomplish this. Zn this article some possible procedures will be compared in order to clarify whether considerable differences in the suggested optimal designs occur, dependent on the used method.
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页码:887 / 894
页数:8
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