Procedures and Measures
Maternal postpartum visits occurred at weeks 1, 6, and 14 after delivery and then every 12 weeks through week 74. Infant visits occurred at postpartum weeks 1, 6, 10, 14, 18, 22, and 26, then every 12 weeks until week 98, with a final visit at week 104. Self-reported adherence was collected for all the mother–infant pairs at weeks 1, 6, 14, 26, 50, and 74 using a validated adherence questionnaire.