Figure 1

Subgroup analysis of association between education and the risk of incident CHD according to potential risk factors. All covariates were age, smoking, drinking, physical activity, marital status, stress, fruit intake, vegetable intake, BMI, waist circumference, hypertension, hyperlipidemia, diabetes, and family history of CHD. Each group adjusted for the other covariates except itself. The reference group was low education. Horizontal lines represent 95% confidence intervals.