Associations of sitting time and occupation with metabolic syndrome in South Korean adults: a cross-sectional studyReport as inadecuate

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BMC Public Health

, 16:943

Energy balance-related behaviours


BackgroundPrevious evidence suggests that there is a correlation between prolonged sitting time and cardio-metabolic disease, such as metabolic syndrome MS. Cardiovascular disease is the second-leading cause of mortality in South Korea, a country with the longest working hours among all member states of the Organization for Economic Co-operation and Development. However, no previous study has investigated the relationships of overall sitting-time and occupation with MS in South Korea. Accordingly, the present study examined these relationships in a South Korean population.

MethodsData from the sixth Korean National Health and Nutrition Examination Survey KNHANES, a nationally representative survey with a cross-sectional design, were used in the present study. MS diagnoses were evaluated using the International Diabetes Foundation IDF criteria. Participants self-reported their overall sitting times, and occupations were classified using the Korean version of the Standard Classification of Occupations KSCO. A multiple logistic regression analysis was conducted to evaluate the associations of sitting time and occupation with MS.

ResultsThe risk of MS was 1.21-fold higher among participants who sat for >7 h-day than among those who sat for ≤7 h-day odds ratio OR: 1.21, 95 % confidence interval CI: 1.00–1.46. Regarding occupation, office workers had a two-fold higher risk of MS than did agriculture, forestry, and fishery AFF workers OR: 2.01, 95 % CI: 1.26–3.22. In a combined analysis of sitting time and occupation, male participants who sat for >7 h-day and reported an occupation that involves office work OW or machine fitting MF were significantly more likely to have MS when compared to those who sat for ≤7 h-day and were employed as AFF workers >7 h-day × OW, OR: 2.41, 95 % CI: 1.05–5.51; >7 h-day × MF, OR: 2.92, 95 % CI: 1.43–5.93.

ConclusionsExcessive sitting time and a sedentary occupation correlated positively with MS in South Korean adults. Accordingly, a reduction in the overall sitting time or inclusion of energy-expending activities in the workplace might improve the rate of MS.

KeywordsSitting-time Sedentary behavior Occupation Metabolic syndrome AbbreviationsAFFagriculture, forestry and fishery

CIconfidence interval

KNHANESKorean National Health and Nutrition Examination Survey

MFmachine fitting and simple labor

MSmetabolic syndrome

NHANESthe National Health and Nutrition Examination Survey

NHISthe National Health Interview Survey

OECDOrganization for Economic Co-operation and Development

ORodds ratio

OWoffice work

PAphysical activity

SSsales and services

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Author: Jin Young Nam - Juyoung Kim - Kyung Hee Cho - Young Choi - Jaewoo Choi - Jaeyong Shin - Eun-Cheol Park


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