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 Original Article Korean Journal of Epidemiology 2004;26(2): 20-31.
 Reliability and Validity of the Modified Korean Version of Baecke Questionnaire on Physical Activity. Ji Young Lee, Young Ho Yun, Eun Cheol Park, Hong Wan Seo, Ju Huk Lee, Hai Rim Shin, Kui Son Choi Research Institute, National Cancer Center, Korea.kschoi@ncc.re.kr Abstract PURPOSE: Our main goal is to test the reliability and validity of the Korean version of Baecke questionnaire on physical activity by using 507 men and women aged 20-70 years. METHOD: This study was carried out using the cancer screening participants of the National Cancer Center. All subjects were sent the Korean version of Baecke questionnaire by mail to measure their physical activity. RESULTS: The mean score on the sport index during leisure-time for men was significantly higher than that for women. In contrast, the mean score of the work index for men was significantly lower than that for women. Cronbachs alphas for work, sport and leisure-time index were 0.75, 0.81 and 0.39 for men, respectively, and 0.67, 0.75 and 0.35 for women respectively. By a principal components analysis the three conceptually meaningful factors were distinguished, except for the leisure-time factor. Due to the low cronbachs alphas and undistinguished factors, work and sports factors were used on the final analysis, excluding the leisure time factor, in the Korean version of Baeckes questionnaire. Two-factor analysis was used to assess the validity of work items and sports items. Work factor and sports factor were definitely distinguished as two factors. Multiple regression analysis showed that lean body mass was significantly related the work index(p<0.0001) and sports index (p<0.05). CONCLUSION: Our results suggest that the modified Korean version of Baeckes questionnaire is appropriate to assess the physical activity in Koreans. Keywords: physical activity; reliability; validity; factor analysis
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