Females had a higher mortality rate than males among children randomized to receive IPV ( mortality rate ratio [ MR ] 1.52 , 95 % CI 1.02-2 .28 ) , but females had a similar mortality rate to males among children randomized to receive MV ( MR 1.01 , 0.69-1 .46 ) and among children in the IPV group after they had received MV at 9 months of age or later ( MR 0.88 , 0.68-1 .14 ) .
