The proportion of women with detectable ( > @ copies/mL ) HIV-@ RNA in breast milk appeared to be increased in the selenium group ( @ % ) compared with those in the placebo group ( @ % ) among the total cohort ( N = @ ) , but results were borderline statistically significant ( relative risk -LSB- RR -RSB- , @ ; @ % confidence interval -LSB- CI -RSB- , @-@ @ ; P = @ ) .