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J Korean Dent Assoc. 2014;52(9):558-569. Published online September 30, 2014.
DOI: https://doi.org/10.22974/jkda.2014.52.9.004
- 치의학 연구에서의 표본크기 산출
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임회정
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전남대학교 치의학전문대학원 교정학교실, 치의학 연구소
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- Sample size determination in dental research
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Hoi-Jeong Lim
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Department of Orthodontics, Chonnam National University School of Dentistry, Dental Science Research Institute
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- Abstract
- Sample size determination is critical, but not easy to do. Sample size defined as the number of observations in a sample to be studied should be big enough to have a high likelihood of detecting a true difference between groups. Practical procedure for determining sample size, using G*power and previous dental articles, was shown in this study. Examples involving independent t-test, paired t-test, one-way analysis of variance(ANOVA), and one-way repeated-measures(RM) ANOVA were used. The purpose of this study is to enable researchers with non-statistical backgrounds to use in practice freely available statistical software G*power to determine sample size and power.
Keywords :sample size;power analysis;dental research;
