Association of Shift Work with Normal-Weight Obesity in Community-Dwelling Adults
- Author:
Chul Woo AHN
1
;
Sungjae SHIN
;
Seunghyun LEE
;
Hye-Sun PARK
;
Namki HONG
;
Yumie RHEE
Author Information
- Publication Type:Original Article
- From:Endocrinology and Metabolism 2022;37(5):781-790
- CountryRepublic of Korea
- Language:English
-
Abstract:
Background:Shift work is associated with obesity and metabolic syndrome. However, this association in the normal-weight population remains unclear. This study aimed to investigate whether shift work is associated with normal-weight obesity (NWO).
Methods:From the nationally representative Korea National Health and Nutrition Examination Survey (KNHANES) dataset (2008 to 2011), 3,800 full-time workers aged ≥19 years with a body mass index (BMI) ≤25 kg/m2 were analysed. We defined NWO as BMI ≤25 kg/m2 and body fat percentage ≥25% in men and ≥37% in women. Working patterns were classified into “daytime,” “other than daytime,” and “shift.” Multivariable logistic regression analysis was performed to evaluate the relationship between shift work and NWO.
Results:Shift work was associated with higher odds of NWO than daytime work (adjusted odds ratio [aOR], 1.47; 95% confidence interval [CI], 1.04 to 2.09) and night/evening work (aOR, 1.87; 95% CI, 1.11 to 3.14) after adjustment for type of work, working hours, age, sex, BMI, 25-hydroxyvitamin D levels, homeostatic model assessment for insulin resistance, and other sociodemographic factors. In subgroup analyses, the association between shift work and NWO was more robust in those aged ≥60 years and those working ≥56 hours/week.
Conclusion:Shift work was associated with NWO in community-dwelling Korean adults, independent of age, sex, BMI, and other covariates.
