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Risk for mother to child HIV-1 infection was increased by breast feeding

Main results Analysis was by intention to treat. At 24 months, the cumulative probability of HIV-1 infection was higher in breastfed infants than in formula fed infants (p = 0.001) (table). A significant difference existed between breastfed and formula fed infants at all ages after birth, with a 10.2% cumulative difference occurring at 6 weeks (CI 3.1 to 17.3, p = 0.005). The groups did not differ for mortality (p = 0.30) (table), and no difference existed at any age after birth.