Relative to baseline , on day @ , median change in biomarkers for placebo , @,@ IU cholecalciferol , and @,@ IU cholecalciferol groups , respectively , were as follows : @ ) total @-hydroxyvitamin D , @ % ( -@ % to @ % ) , @ % ( @-@ % ) , and @ % ( @-@ % ) ( p < @ ) ; @ ) bioavailable @-hydroxyvitamin D , @ % ( -@ % to @ % ) , @ % ( @-@ % ) , and @ % ( @-@ % ) ( p < @ ) ; and @ ) LL-@ : -@ % ( -@ % to -@ % ) , @ % ( -@ % to @ % ) , and @ % ( @-@ % ) ( p = @ ) .