Results from the prospective Atherosclerosis Risk in Communities (ARIC) study were used to examine the association of hip circumference with diabetes and coronary heart disease (CHD) (n=10,767). There was a positive relationship between hip circumference and diabetes risk but not with CHD. However, after adjusting for body mass index and waist circumference, there was an inverse relationship between hip circumference and the incidence of diabetes and CHD. For a given body mass index and waist circumference, greater hip circumference therefore appears to be associated with a reduced risk of diabetes and CHD.