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Epidemiol Health > Accepted Articles
Epidemiology and Health 2018;e2018060.
DOI: https://doi.org/10.4178/epih.e2018060    [Accepted] Published online November 29, 2018.
Comparison of self-report and accelerometer measurement of physical activity according to sociodemographic characteristics in Korea
Seung Won Lee1,2  , Jee-Seon Shim2,3  , Bo Mi Song1,2  , Ho Jae Lee2  , Hye Yoon Bae2  , Ji Hye Park1,2  , Hye Rin Choi1,2  , Jae Won Yang1,2  , Ji Eun Heo1,2  , So Mi Jemma Cho1,2  , Ga Bin Lee1,2  , Diana Huaman Hidalgo1,2  , Tae-Hoon Kim4  , Kyung Soo Chung5  , Hyeon Chang Kim3,3 
1Department of Public Health, Yonsei University of Graduate School, Seoul, Korea
2Cardiovascular and Metabolic Diseases Etiology Research Center, Yonsei University College of Medicine, Seoul, Korea
3Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea
4Department of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea
5Department of Internal Medicine, Institute of Chest Disease, Yonsei University College of Medicine, Seoul, Korea
Correspondence  Hyeon Chang Kim ,Tel: 82-2-2228-1873, Fax: 82-2-392-8133, Email: hckim@yuhs.ac
Received: September 12, 2018  Accepted after revision: November 29, 2018
Abstract
Objectives:
Previous studies have shown that correlations between self-reported and accelerometer-assessed physical activities are relatively low. However, the association differ by socio-demographic factors and has not been fully investigated in the general population. Thus, we investigated the correlation between self-reported and accelerometer-assessed physical activities and whether it differs by demographic and socioeconomic factors among Korean general population.
Method:
This cross-sectional study included 623 participants (203 men and 420 women) aged 30 to 64 years old, 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/week) between two 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/week was 0.16 in total population, suggesting overall poor agreement. The correlation coefficient between two measurements was 0.26 (p<.0001) in total population, and the correlation tended to decrease, as age (p for trend <.0001) and depression score (p for trend 0.0009) increased.
Conclusions:
In conclusion, we found that low correlations between self-reported and accelerometer-assessed physical activities and the correlations decrease with age and depression score among healthy Korean adults. When studying physical activity using accelerometers and/or questionnaire, age and depression need to be considered and differences between self-reported and accelerometer-assessed physical activity also should be considered.
Keywords: physical activity; accelerometer; questionnaire; Korean
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