Design and analysis of studies to reduce the incidence of colon polyps.
Design and analysis of studies to reduce the incidence of colon polyps.
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设计和分析降低结肠息肉发病率的研究。
DOI:
10.1002/sim.4780120316
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发表时间:
1993
影响因子:
2
通讯作者:
Alberts,D
中科院分区:
文献类型:
--
作者:
Emerson,SS;McGee,DL;Fennerty,B;Hixson,L;Garewal,H;Alberts,D
Decisions regarding the design and analysis of a phase III study to reduce the incidence of colorectal polyps must take into account two complicating factors: the possibility that polyps are missed during screening exams, and variable lengths of follow‐up. In this paper we investigate the effects due to misclassification on the power of statistical tests to detect a change in polyp recurrence rates. We also use Monte Carlo studies to examine the relative efficiency of different methods of adjusting for variable times of follow‐up.
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