Randomisation
The three eligible districts in the Dosso region were randomly assigned to an intervention condition using a computer-generated random number list. Within each district, we used a different computer-generated random number list to select 16 villages among those meeting inclusion criteria; four of those 16 villages in each district were randomly assigned to the control condition, for a total of 12 villages in each of the four study conditions (control, Arm 1, Arm 2, Arm 3). Within each of the selected villages, we randomly selected 25 households inclusive of a married female adolescent aged 13–19 years and her husband using from a list of all such households generated with the assistance of the village chief. Research assistants visited the randomly selected households to confirm eligibility; those not meeting these criteria were replaced by a household randomly selected from those remaining of the list.