The Journal of the Korean dental association (대한치과의사협회지)

The Korean Dental Association (대한치과의사협회)
권호 표지

Sample size determination in dental research

치의학 연구에서의 표본크기 산출

  • Lim, Hoi-Jeong (Department of Orthodontics, Chonnam National University School of Dentistry, Dental Science Research Institute)
  • 임회정 (전남대학교 치의학전문대학원 교정학교실, 치의학 연구소)
  • Received : 2014.06.05
  • Accepted : 2014.08.25
  • Published : 2014.09.01
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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

Acknowledgement

Supported by : 전남대학교

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