By 9 months of age , 382 of 568 ( 67.3 % ) infants at intervention sites and 338 of 594 ( 57.0 % ) at control sites had tested for HIV [ odds ratio ( OR ) 1.45 , 95 % confidence interval ( CI ) : 0.71 to 2.82 ] ; 7.3 % of infants tested HIV positive at intervention sites compared with 8.0 % of infants at control sites ( OR 0.89 , 95 % CI : 0.56 to 1.43 ) .