Hypothesis
Monthly participatory women's health groups, which reduced postpartum psychological distress in eastern India, would do the same in rural Bangladesh.
What failed
In a cluster-randomised trial with 18 clusters and 6,275 mothers, distress scores were 5.2 in the intervention arm and 5.3 in the control arm, a difference that was not significant.
Broken assumption
A community group intervention that reduced postpartum distress in one South Asian setting will work in another.
Why
The abstract does not give a cause. A result from India did not carry over to a similar setting in Bangladesh. This is a secondary analysis of a trial designed for other outcomes.
From the published paper: Rose‐Clarke et al. PLoS ONE, 2014. ↗CC BY