Primary Outcome
Our primary outcome was a reduced prevalence of global developmental delays in the intervention arm as compared to the control arm when the child was aged 24 months, measured using the ASQ-3.This questionnaire enables the identification of development delays accurately at an early stage and so can be referred for early-level interventions. It has strong psychometric properties with 96% specificity, 87% sensitivity, and 92% test-retest reliability and has been examined for screening development delays in LMICs.