Relationship between the serum level of leptin and life-style habits in Japanese men

Aims/Methods: To investigate whether smoking affects the serum level of lep tin, 708 male workers aged 25-65 years old were cross-sectionally surveyed. Results: Multiple regression analysis indicated that among the various par ameters examined, the level of leptin was positively associated with the bo dy mass index and the levels of insulin, total cholesterol and uric acid, a nd was inversely associated with physical activity and the level of creatin ine. The partial correlation coefficient of leptin was highest against the body mass index (r = 0.40), followed by insulin (0.29) and physical activit y (-0.14), after adjustment for other leptin-related variables, However, no association was observed between the level of leptin and smoking (0.05), a lcohol consumption (0.09) or age (0.09). Conclusions: The findings suggest that;among life-style habits, physical activity, but not smoking or alcohol consumption, significantly affects the serum level of leptin in Japanese m en. Copyright (C) 2001 S. Karger AG, Basel.