Statistics review 4: Sample size calculations

被引：0

作者：

Whitley, E ^{[1
]}

Ball, J

机构：

[1] Univ Bristol, Bristol, Avon, England

[2] Univ London St Georges Hosp, Sch Med, London SW17 0RE, England

来源：

CRITICAL CARE | 2002年 / 6卷 / 04期

关键词：

statistical power; sample size;

D O I：

暂无

中图分类号：

R4 [临床医学];

学科分类号：

1002 ; 100602 ;

摘要：

The present review introduces the notion of statistical power and the hazard of under-powered studies. The problem of how to calculate an ideal sample size is also discussed within the context of factors that affect power, and specific methods for the calculation of sample size are presented for two common scenarios, along with extensions to the simplest case.

引用

页码：335 / 341

页数：7

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