Fig. 2
Results of restrictive cubic spline analysis. Model 1 was unadjusted, Model 2 was adjusted for age, gender, race, and family income-to-poverty ratio. Model 3 was adjusted for age, gender, race, family income-to-poverty ratio, total cholesterol, systolic blood pressure, diastolic blood pressure, body mass index, hypertension, hypercholesterolemia, diabetes, arthritis, congestive heart failure, coronary heart disease, angina pectoris, stroke, emphysema, cancer, smoke, alcohol adjustments.
