대한치과의사협회지 (The Journal of the Korean dental association)

  • 제58권3호
  • /
  • Pages.152-168
  • /
  • 2020
  • /
  • 0376-4672(pISSN)
  • /
  • 2713-7961(eISSN)
대한치과의사협회 (The Korean Dental Association)
권호 표지

치의학 연구에서 R program을 이용한 성향점수매칭의 단계적 안내

A step-by-step guide to Propensity Score Matching method using R program in dental research

  • 안화연 (전남대학교 치과병원) ;
  • 임회정 (전남대학교 치의학전문대학원 치과교정학교실, 치의학 연구소)
  • An, Hwayoen (Chonnam National University Hospita) ;
  • Lim, Hoi-Jeong (Department of Orthodontics, Chonnam National University, School of Dentistry, Dental Science Research Institute)
  • 투고 : 2019.12.30
  • 심사 : 2020.01.29
  • 발행 : 2020.02.29
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초록

The propensity score matching method is a statistical method used to reduce selection bias in observational studies and to show effects similar to random allocation. There are many observational studies in dentistry research, and differences in baseline covariates between the control and case groups affect the outcome. In order to reduce the bias due to confounding variables, the propensity scores are used by equating groups based on the baseline covariates. This method is effective, especially when there are many covariates or the sample size is small. In this paper, the propensity score matching method was explained in a simple way with a dental example by using R software. This simulated data were obtained from one of retrospective study. The control group and the case group were matched according to the propensity score and compared before and after treatment. The propensity score matching method could be an alternative to compensate for the disadvantage of the observation study by reducing the bias based on the covariates with the propensity score.

키워드

과제정보

This Research was supported by the National Research Foundation of Korea (NRF) grant, funded by the Korea government (No. 2018R1D1A1B07049719).

참고문헌

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