Data Collection Notes
Baseline Surveys
Baseline surveys were conducted through house to house visits of all households within the trial evaluation clusters by fieldworkers recruited for the surveillance system to be resident in each cluster, with one fieldworker per cluster. They were carried out at the same time as registering all women into the surveillance systems who were aged less than 50 years, married, not sterilized and whose husbands were not sterilised.
The surveys used a baseline questionnaire administered through a mobile based application, which collected data on the youngest child aged less than 5 years including questions on maternal education, place of delivery of the youngest child plus breastfeeding and infant feeding practices. It also recorded GPS coordinates for each household. This was followed by an anthropometry survey which was carried out by supervisory level staff for children identified who were aged 18-30 months. In India, this was conducted alongside the baseline survey. In Pakistan, the anthropometry survey was carried out later as a separate cross-sectional exercise.