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Korean J Med Educ > Volume 21(3); 2009 > Article
Korean Journal of Medical Education 2009;21(3): 259-267. doi: https://doi.org/10.3946/kjme.2009.21.3.259
의대생의 근거중심의학(Evidence-Based Medicine) 수행역량 평가를 위한 질문지 개발 및 타당화
박재현1, 윤태영2, 고진경1
1경희대학교 의학전문대학원 의학교육학교실
2경희대학교 의학전문대학원 예방의학교실
Development and Validation of a Questionnaire to Evaluate Medical Students' Evidence-Based Medicine Competencies
Jaehyun Park1, Taeyoung Yoon2, Jinkyung Ko1
1Department of Medical Education, Kyung Hee University School of Medicine, Seoul, Korea.
2Department of Preventive Medicine, Kyung Hee University School of Medicine, Seoul, Korea.
Corresponding Author: Jinkyung Ko, Tel: 02-961-9102, Fax: 02-969-0792, Email: michkay@khu.ac.kr
Received: March 10, 2009;  Accepted: June 10, 2009.
PURPOSE: The purpose of the study was to develop and validate a questionnaire to evaluate medical students' knowledge of, attitude towards and practice of evidence-based medicine (EBM). METHODS: The participants of the study were 418 medical students enrolled in the Kyung Hee University School of Medicine in Seoul, Korea. To examine construct validity of the questionnaire, an exploratory factor analysis (EFA) was performed with 118 participants; a confirmatory factor analysis (CFA) was conducted with the remaining 281 participants. We developed 41 items with a 4-point Likert scale. An EFA was performed to verify the emergence of four dimensions of EBM competencies. The principal axis factoring method and the direct oblimin rotation method were used. To confirm construct validity, a CFA was conducted with the remaining 281 participants. To evaluate model fitness, root mean square error of approximation (RMSEA) and comparative fit index (CFI) were used as fit indices. We conducted ANOVA with Scheffe as discriminant validation, and calculated Cronbach's alpha of 4 subscales as reliability checkup. RESULTS: After refinement procedure, factor analysis of the 32 items in therevised questionnaire yielded 4 factors. The Scree plot supported a 4 factor solution explaining 53.5% of the variance. The 4 components derived were: factor 1_knowledge on EBM (11 items; Cronbach's alpha=0.92); factor 2_ pursuit towards EBM (10; 0.88); factor 3_reluctance on EBM (7; 0.78); factor 4_practice of EBM (4; 0.75). The questionnaire could discriminate competence differences among 1-3 yr students. Satisfactory Cronbach's alpha scores were noted for each factor as well. CONCLUSION: The EBM competency questionnaire was validated.
Keywords: Evidence-based medicine;Undergraduate medical education;Educational measurement
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