In stratified analyses , the positive association between 25 ( OH ) D and colorectal cancer was stronger among men with DBP levels above the median ( OR = 1.89 ; 95 % CI : 1.07 , 3.36 , p for trend = 0.01 ) than below the median ( OR = 1.20 ; 95 % CI : 0.68 , 2.12 , p for trend = 0.87 ) , although the interaction was not statistically significant ( p for interaction = 0.24 ) .