Effects of weaning before 15 months on the combined outcome of HIV transmission or uninfected child mortality stratified by the severity of maternal HIV disease in the intervention and control groups separately.

*Less severe disease was defined as CD4 counts >350 cells/µL during pregnancy or if between 200 and 349 cells/µL had to be classified as WHO stage II or less; more severe disease was defined as CD4 count <200 cells/µL or if CD4 count 200–349 cells/µL had to be classified as WHO stage III or greater.
†Hazard ratios are from Cox Proportional Hazards models treating breast feeding cessation before 15 months as a time-dependent covariate adjusting for maternal viral load, hemoglobin, body mass index, parity and child birth weight. Hazard ratios >1 indicate that weaning increases the risk of the combined outcome of HIV infection or death. Hazard ratios <1 indicate that weaning decreases the risk of the outcome.