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KMID : 0362720140520090558
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Journal of the Korean Dental Association
2014 Volume.52 No. 9 p.558 ~ p.569
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Sample size determination in dental research
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Lim Hoi-Jeong
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Abstract
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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 ttest, 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.
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KEYWORD
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sample size, power analysis, dental research
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