Intervention Fidelity
Intervention fidelity was ensured through weekly supervision of the antenatal nurses by trained THP supervisors (PB and MD). The nurses were provided group supervision lasting up to 2 hours and entailed reviewing the progress of intervention delivery, and additional refresher training on intervention components. The THP supervisors in turn received monthly supervision by a Master Trainer (NA) online for approximately 1 hour. In addition, antenatal nurses had day-to-day support of their supervisor at the hospital. Intervention fidelity was tested through independent observations of sessions by the THP supervisors using the Enhancing Assessment of Common Therapeutic factors tool (ENACT) [