Proactive Community Case Management and Child Survival: A Cluster-Randomized Controlled Trial

The trial is an un-blinded, cluster-randomised controlled trial, with 69 clusters in the intervention arm and 68 clusters in the comparison arm. The cluster is defined as a geographical grouping of homes greater than one kilometre from the next nearest geographical grouping of homes (determined by the cardinal distances between GPS coordinates collected at the public gathering space). In practice, this means a cluster can consist of one village or one hamlet, or a collection of neighbouring villages and/or hamlets.

Clusters were randomised to receive either iCCM from a stationary CHW based at a community health post (control) or ProCCM from a CHW who conducts daily active case-finding home visits for at least two hours a day, six days per week. Randomisation was stratified by distance to PHC (1.0-5.0 km vs. greater than 5.0 km); an additional stratum was defined for all villages where the PHC was located to ensure balanced assignment of PHC villages across arms. Within each strata, villages were randomly assigned to the control or treatment arm using a computer-generated random number, then rank ordered based on this number.

All clusters receive PHC infrastructure improvements and staff training, the removal of user fees at all levels of care, and CHW(s) who provide iCCM of common childhood illnesses in accordance with national and international standards, as well as other community-based services, including a reproductive health package for women of child-bearing age. CHW coverage is based on Mali's national iCCM strategy, which assigns each CHW to an average population of 700 in the southern region. Clusters with less than 200 people and within three kilometres of another cluster assigned to the same study arm share a CHW, provided there is no geographic barrier (i.e. river) between the two clusters and no linguistic barrier for the CHW. CHWs in both arms are required to be on call, available to receive and care for patients who seek them out, 24 hours per day, seven days per week.

The primary outcome is a cluster-level outcome, the under-five mortality rate. It is measured within each cluster as the number of deaths among children under five years of age per 1,000 person-years at risk of mortality. After 36 months, we hypothesize that there will be an absolute difference of 0.75% (or a relative difference of 25%) in under-five child mortality between the two study arms, as measured by the number of deaths per 1,000 person-years among children aged 0 to 59 months. Secondary endpoints include a number of reproductive, maternal, and child health outcomes, as well as access and service delivery outcomes. Secondary objectives also include an economic evaluation of the cost-effectiveness, equity, and affordability at scale of ProCCM compared to iCCM.

An exhaustive census will be administered to the population of the study area (both arms) at baseline. The census will assign a unique identification number to each person surveyed. At each household, a screening will take place to identify women eligible for inclusion. Eligible women identified in the study area will be asked to give written informed consent for their inclusion in the study (or their legal guardians in the case of unemancipated minors). The baseline survey will be administered after consent is obtained. Using the unique census ID number, the same participants will be identified and surveyed again at 12, 24 and 36 months.