Women's Health Nursing (여성건강간호학회지)
- Volume 4 Issue 3
- /
- Pages.375-387
- /
- 1998
- /
- 3022-7666(pISSN)
- /
- 3022-8247(eISSN)
A Review on the Methods of Sample Size Determination in Nursing Research
간호학 연구에서의 표본크기 결정 방법에 대한 고찰
- Lee, Jae-Won (Department of Statics, Korea University) ;
- Park, Mi-Ra (Department of PreMedicine, Ulji Medical College) ;
- Lee, Jung-Bok (Department of Statics, Korea University) ;
-
Lee, Sook-Ja
(College of Nursing, Korea University)
;
- Park, Eun-Sook (College of Nursing, Korea University) ;
-
Park, Young-Joo
(College of Nursing, Korea University)
- 이재원 (고려대학교 통계학과) ;
- 박미라 (을지의과대학 의예과) ;
- 이정복 (고려대학교 통계학과) ;
-
이숙자
(고려대학교 간호대학)
;
- 박은숙 (고려대학교 간호대학) ;
-
박영주
(고려대학교 간호대학)
- Published : 1998.12.30
Abstract
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.