Comparison of self-reported and accelerometer-assessed measurements of physical activity according to sociodemographic characteristics

• Published in: Epidemiology and health 2018, 40(0), , pp.1-10
• Main Authors: 이승원, Jee-Seon Shim, Bo Mi Song, Ho Jae Lee, Hye Yoon Bae, Ji Hye Park, M.D., Hye Rin Choi, 양재원, 허지은, So Mi Jemma Cho, Ga Bin Lee, Diana Huanan Hidalgo, 김태훈, 정경수, 김현창
• Format: Article
• Language: English
• Subjects: 예방의학
• ISSN: 2092-7193
• DOI: 10.4178/epih.e2018060

OBJECTIVES: Previous studies have shown relatively low correlations between self-reported and accelerometer-assessed physical activity. However, this association differs by socio-demographic factors, and this relationship has not been fully investigated in the general population. Thus, we investigated the correlation between self-reported and accelerometer-assessed physical activity and whether it differed by demographic and socioeconomic factors among the Korean general population. METHODS: This cross-sectional study included 623 participants (203 men and 420 women) aged 30 to 64 years, who completed a physical activity questionnaire and wore a wrist-worn accelerometer on the non-dominant wrist for 7 days. We examined the agreement for metabolic equivalent task minutes per week (MET-min/wk) between the 2 measures and calculated Spearman correlation coefficients according to demographic and socioeconomic factors. RESULTS: The κ coefficient between tertiles of self-reported and accelerometer-assessed total MET-min/wk was 0.16 in the total population, suggesting overall poor agreement. The correlation coefficient between the 2 measurements was 0.26 (p