The Association Between Long Working Hours and High-Sensitivity C-Reactive Protein in Older Aged Individuals: The Korea National Health and Nutrition Examination Survey (KNHANES) 2015

OBJECTIVE:To show the association of hs-CRP level with working hours in different age groups. METHODS:We used data from Korean National Health and Nutrition Survey. The odds ratios (ORs) and 95% confidence intervals (CIs) of variables for elevated hs-CRP (> 3.0 mg/L) were generated with logistic regression models. Significant variables were verified with an adjusted multivariate logistic model after stratification of age groups. RESULTS:Working for more than 55 hours per week was associated with elevated hs-CRP level in the old-ages group (≥ 60 years oldOR 2.18, 95% CI 1.07–4.45). Working for 40–55 hours per week was associated with decreased hs-CRP in the young-ages group (OR 0.58, 95% CI 0.37–0.93). CONCLUSIONS:Working hours appear to influence the levels of hs-CRP in individuals aged older than 60 years.