The impact of a mother-infant intervention on parenting and infant response to challenge: A pilot randomized controlled trial with adolescent mothers in El Salvador.

A pilot randomized controlled trial (RCT) was conducted in El Salvador of an intervention ('Thula Sana') previously shown to enhance maternal sensitivity and infant security of attachment in a South African sample. In El Salvador, trained community workers delivered the intervention from late pregnancy to 6 months postpartum as part of a home-visiting programme. The sample comprised 64 pregnant adolescent women, aged 14-19 years, living in predominantly rural settings. They were randomised to receive either the intervention or normal care. Demographic information was collected at baseline and, immediately post-intervention, blind assessments were made of parental sensitivity and infant emotion regulation. The intervention was found to have a substantial positive impact on maternal sensitivity. Further, compared to control group, infants in the intervention group showed more regulated behaviour: in a social challenge task they showed more attempts to restore communication, and in a non-social challenge task they showed more social and goal-directed behaviour. This replication and extension of the South African findings in a small El Salvador sample shows promise and justifies the conduct of a large-scale RCT in a Central or South American context.