• Korean J Radiol · Mar 2015

    Review

    Propensity score matching: a conceptual review for radiology researchers.

    • Seunghee Baek, Seong Ho Park, Eugene Won, Yu Rang Park, and Hwa Jung Kim.
    • Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, Seoul 138-736, Korea.
    • Korean J Radiol. 2015 Mar 1;16(2):286-96.

    AbstractThe propensity score is defined as the probability of each individual study subject being assigned to a group of interest for comparison purposes. Propensity score adjustment is a method of ensuring an even distribution of confounders between groups, thereby increasing between group comparability. Propensity score analysis is therefore an increasingly applied statistical method in observational studies. The purpose of this article was to provide a step-by-step nonmathematical conceptual guide to propensity score analysis with particular emphasis on propensity score matching. A software program code used for propensity score matching was also presented.

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