Cost-effectiveness of a weaning food safety and hygiene programme in rural Gambia

Objective: The main objective of the economic evaluation was to determine the cost-effectiveness of a weaning food safety and hygiene programme in reducing rates of diarrhoea compared with the control in rural Gambia. Methods: The public health intervention, using critical control points and motivational drivers, was evaluated in a cluster randomised controlled trial at 6- and 32-month follow-up. An economic evaluation was undertaken alongside the RCT with data collected prospectively from a societal perspective. Decision-analytic modelling was used to explore cost-effectiveness over a longer time period (4 years). Results: Direct out-of-pocket healthcare expenditure for households due to diarrhoea was large. The intervention significantly reduced reported childhood diarrhoeal episodes after 6 months (incident risk ratio = 0.40, 95% CI 0.33, 0.49) and 2 years after the intervention (incident risk ratio = 0.68, 95% CI 0.46, 1.02). The within-trial analysis found that the intervention led to total savings of 8064 dalasi 6 months after the intervention and 4224 dalasi 2 years after the intervention. Based on the model results, if the intervention is successful in maintaining the reduction in the risk of diarrhoea, the ICER is US$ 814 per DALY avoided over 4 years. This is cost-effective. Conclusions: This study suggests that there are substantial household costs associated with diarrhoeal episodes in children. The within-trial analysis and model results suggest that the community-based approach to improving weaning food hygiene and safety is likely to be cost-effective compared with control.