Data Analytic Strategy
reduced depression, depression
All models were fit using SAS statistical software version 9.4 (SAS Institute). All analyses were conducted with the full intention-to-treat sample. We compared differences by condition on baseline demographic and clinical characteristics using To test hypotheses that participants assigned to IPT would experience reduced depression symptoms across pregnancy, we implemented hierarchical linear modelingStatistical power was calculated for the between-groups design (IPT vs EUC) using estimates based on prior IPT perinatal depression intervention studies.