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Tae-Hoon Kim 1 Article
Comparison of self-reported and accelerometer-assessed measurements of physical activity according to socio-demographic characteristics in Korean adults
Seung Won Lee, Jee-Seon Shim, Bo Mi Song, Ho Jae Lee, Hye Yoon Bae, Ji Hye Park, Hye Rin Choi, Jae Won Yang, Ji Eun Heo, So Mi Jemma Cho, Ga Bin Lee, Diana Huanan Hidalgo, Tae-Hoon Kim, Kyung Soo Chung, Hyeon Chang Kim
Epidemiol Health. 2018;40:e2018060.   Published online November 29, 2018
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AbstractAbstract AbstractSummary PDF
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.
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.
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).
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.
Korean summary
역학연구에서 신체활동량 측정에 가장 많이 사용되는 설문조사와 가속도계 착용법인데, 두 가지 방법으로 측정한 신체활동량은 상관성이 그리 높지 않으며, 대상자 특성에 따라서도 일치도가 다른 것으로 보고되고 있다. 따라서, 비교적 건강한 중년의 한국 성인을 대상으로 자가설문과 가속도계 조사를 사용해 측정한 신체활동량의 관련성을 조사해보았다. 이 연구는 전향적 코호트 연구의 기반조사 결과를 이용한 단면연구로, 지역사회 거주하는 30-64세 성인 623명(남성203명, 여성 420명)을 대상으로 하였으며, 신체활동을 자가보고 설문조사와 3축 가속도계를 7일간 손목에 연속착용하여 측정하고 두 방법으로 측정한 신체활동량을 비교하였다. 전체 대상자에서 두 방법으로 측정한 신체활동량 삼분위(tertile) 값의 일치도를 조사했을 때 Kappa 통계량은 0.16 이었으며 Spearman 상관계수는 0.26 (p<0.001)이었다. 나이가 많을수록 우울증상이 많을수록 두 방법 간 일치도와 상관성이 낮아지는 경향을 보였다.


Citations to this article as recorded by  
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