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이재원 ( Lee Jae-Won ) - 고려대학교 통계학과
박미라 ( Park Mi-Ra ) - 을지대학교 의과대학 의예과
이정복 ( Lee Jung-Bok ) - 고려대학교 통계학과
이숙자 ( Lee Sook-Ja ) - 고려대학교 간호대학
박은숙 ( Park Eun-Sook ) - 고려대학교 간호대학
박영주 ( Park Young-Joo ) - 고려대학교 간호대학
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Abstract
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In clinical trials of nursing research, the sample size determination is one of the most important factor. Although sample size must be considered at the design stage, it has been disregarded in most clinical trials. The power analysis is usually performed before study begins to compute sample size and the power can also be calculated at the end of study in order to justify study result. The power analysis is essential especially when the clinical trials can not show significant differences. In this paper, we review the statistical methods for power analysis and sample size formulae in nursing research. Sample size formulae and the corresponding examples are discussed according to the six types of studies ; mean for one sample, proportion for one sample, means in two samples, proportions in two samples, correlation coefficient and ANOVA
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KeyWords
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표본크기의 결정, 유효크기, 검정력
Power analysis, Sample size determination, Effect size
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원문 및 링크아웃 정보
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등재저널 정보
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