Household income is associated with the risk of metabolic syndrome in a sex-specific manner

Abstract

OBJECTIVE - To assess the relationship between household income and metabolic syndrome in men and women. RESEARCH DESIGN AND METHODS - A total of 1,695 men and 1,664 women, aged 35-64 years, from three distinct geographical areas of France were investigated. Waist girth, plasma triglycerides, HDL cholesterol, glucose, and systolic blood pressure were used to define metabolic syndrome according to the National Cholesterol Education Program (NCEP)/ Adult Treatment Panel III (ATPIII) guidelines. Household income, educational level, occupational category, working status, consumption of psychotropic drugs, accommodation status, household composition, physical activity at work and during leisure time, alcohol consumption, and smoking habits were recorded with a standardized questionnaire. RESULTS - There were 390 (23.0%) men and 381 (16.9%) women who satisfied NCEP/ ATPIII criteria for metabolic syndrome. Household income (P < 0.0001) and consumption of psychotropic drugs (P = 0.0005) were associated with metabolic syndrome in women but not in men. In contrast, educational level, occupational category, working status, and accommodation status were associated with metabolic syndrome in both men and women. After adjustment on lifestyle variables, household income (interaction P < 0.004) remained inversely associated with metabolic syndrome in women but not in men. CONCLUSIONS - These data suggest that limited household income, which reflects a complex unfavorable social and economic environment, may increase the risk of metabolic syndrome in a sex-specific manner.