In comparison with placebo , the proportion of infants with 25 ( OH ) D 20 ng/mL was larger in both intervention groups to age 4 months : cord blood ( 22 % , 72 % , 71 % , P < .001 ) , 2 months ( 50 % , 82 % , 92 % , P < .001 ) , and 4 months ( 66 % , 87 % , 87 % , P = .004 ) , but only in the higher-dose group at age 6 months ( 74 % , 82 % , 89 % , P = .07 ; higher dose versus placebo P = .03 , lower dose versus placebo P = .21 ) .