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KMID : 1038520180400010060
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Epidemiology and Health
2018 Volume.40 No. 1 p.60 ~ p.60
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Comparison of self-reported and accelerometer-assessed measurements of physical activity according to socio-demographic characteristics in Korean adults
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Lee Seung-Won
Shim Jee-Seon
Song Bo-Mi
Lee Ho-Jae
Bae Hye-Yoon
Park Ji-Hye
Choi Hye-Rin
Yang Jae-Won
Heo Ji-Eun
Cho So-Mi
Lee Ga-Bin
Hidalgo Diana Huanan
Kim Tae-Hoon
Chung Kyung-Soo
Kim Hyeon-Chang
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Abstract
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OBJECTIVES: Previous studies have shown relatively low correlations between self-reported and accelerometer-assessed physical activity (PA). 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 PA 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 PA 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 kappa 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<0.001) in the total population, and the correlation tended to decrease with increasing age (p for trend <0.001) and depression scores (p for trend <0.001).
CONCLUSIONS: We found a low correlation between self-reported and accelerometer-assessed PA among healthy Korean adults, and the correlation decreased with age and depression score. When studying PA using accelerometers and/or questionnaires, age and depression need to be considered, as should differences between self-reported and accelerometer-assessed PA.
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KEYWORD
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Physical activity, Accelerometer, Questionnaire, Korea
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