URs were 48 % for males ( 95 % CI 34 % -61 % ) , 21 % for females ( 95 % CI 16 % -26 % , P = .0002 vs males ) , 40 % for whites ( 95 % CI 27 % -53 % ) , and 37 % for blacks ( 95 % CI 28 % -46 % , P = .66 vs whites ) .