Shiftwork Duration and Metabolic Risk Factors of Cardiovascular Disease

Abstract

2 and central obesity as a WHR (Waist to Hip Ratio) ≥0.85; and the logistic regression analyses, according to years of shiftwork, were performed using sim - ple and adjusted models. R e s u l t s: The cholesterol and fasting blood sugar showed increasing trends, but without statisti- cal significances, according to the increase in shiftwork duration of the male workers, although, the increases in the blood pressure and BMI were statistically significant. In the nurses, only the WHR showed a significant increase in relation to the shiftwork duration. In the logistic regres- sion analyses, hypercholesterolemia and obesity showed significant increasing risks according to the number of years of shiftwork (OR=3.32 95%CI 1.27-8.72 and OR=3.21 95%CI 1.24-8.32 respectively) in the male workers, but hypertension showed no significance. In the nurses, only an increased central obesity was significant as a risk factor (OR=1.30 95%CI 1.05-1.62). Conclusions: These results provide evidence of the associations between shiftwork and meta - bolic risk factors for cardiovascular disease, although healthy shiftworker effects might exist in our cross sectional study design.