Comparing highest to lowest quartiles , DBP was not associated with colorectal cancer risk ( OR = 0.91 ; 95 % CI : 0.58 , 1.42 , p for trend = 0.58 ) ; however , a positive risk association was observed for the molar ratio of 25 ( OH ) D : DBP ( OR = 1.44 ; 95 % CI : 0.92 , 2.26 , p for trend = 0.04 ) .