The circles represent the incidence rate ratios of heart failure comparing the top to bottom quartiles of the DASH component score, and lines represent 95% confidence intervals. P values are for tests of the difference in estimates between those with and without history of hypertension, history of high cholesterol, current cigarette smoking, and body mass index ≥ 25 kg/m2. Estimates come from Cox proportional hazards models accounting for age and adjusted for physical activity (linear), energy intake (linear), education (< high school, high school, university), family history of myocardial infarction at < 60 years (yes, no), cigarette smoking (current, past, never), marital status (single, married, divorced, widowed), history of hypertension and high cholesterol (yes, no), body mass index (linear), and incident myocardial infarction (none, within 1 year, and more distant history). All variables except incident myocardial infarction and incident heart failure are based on self-report.