There were U-shaped associations of vitamin D with total cancer risk : compared with the first quintile , HRs were @ -LSB- @ % confidence interval ( CI ) , @-@ @ ; P = @ -RSB- , @ ( @ % CI , @-@ @ ; P = @ ) , @ ( @ % CI , @-@ @ ; P = @ ) , and @ ( @ % CI , @-@ @ ; P = @ ) , for the second through fifth quintiles , respectively .