Diane Baik

Positive Deviance/Hearth (PDH) is an internationally recognized nutrition rehabilitation program. However, nutritional improvements are inconsistent across contexts. It is unclear if variations are due to differences in program design, implementation, utilization, or other contextual factors. Furthermore, few PDH programs have addressed the high time and work burdens of caregivers and volunteers. To address this, the study integrated interactive voice calling (IVC) with PDH. A program impact pathway (PIP) analysis was used to evaluate the secondary outcomes of facilitators, barriers, and contextual factors that influenced the design, implementation, and utilization of a Positive Deviance/Hearth-Interactive Voice Calling program to improve the nutritional status of children in Cambodia. A PIP analysis was done on data collected through in-depth interviews with caregivers (n = 32), key informant interviews with volunteers (n = 16) and project staff (n = 3), and surveys of project staff (n = 5). In the design phase, facilitators included quality training, technical support and design tools, community mobilization, and linkage to existing health services. Barriers included poor community mobilization. For the implementation phase, facilitators were good volunteer knowledge, follow-up tools and guidance, supervision, and spot checks of volunteers. Barriers were lack of time and overworked older caregivers. For the utilization phase, facilitators included family and volunteer support and access to phones, whereas barriers were lack of support, time, and financial resources; low levels of education and old age of caregivers; and inconsistent phone use. Contextual factors included food insecurity and increased childcare responsibilities of grandmothers due to migration of mothers. The PIP analysis identified facilitators, barriers, and contextual factors that may affect the design, intervention, and utilization of IVC interventions for health and nutrition behavior change and elements to consider when designing and implementing them. When implementing child nutrition programs in Cambodia, supporting interventions addressing mental health and time and resource constraints of elderly caregivers should also be included. This trial was registered at clinicaltrials.gov as NCT03399058.

Child undernutrition in Cambodia is a persistent public health problem requiring low‐cost and scalable solutions. Rising cellphone use in low‐resource settings represents an opportunity to replace in‐person counselling visits with phone calls; however, questions remain on relative effectiveness. Our objective was to evaluate the impact of two options for delivering a World Vision infant and young child feeding (IYCF) counselling programme: (1) traditional Positive Deviance/Hearth (PDH) programme with in‐person visits or (2) PDH with Interactive Voice Calling (PDH‐IVC) which integrates phone calls to replace 62.5% of face‐to‐face interaction between caregivers and volunteers, compared to the standard of care (SOC). We conducted a longitudinal cluster‐randomised controlled trial in 361 children 6–23 months. We used an adjusted difference‐in‐difference approach using baseline, midline (3 months) and endline (12 months) surveys to evaluate the impact on child growth among the three groups. At baseline, nearly a third of children were underweight, and over half were food insecure. At midline the PDH group and the PDH‐IVC groups had improved weight‐for‐age z‐scores (0.13 DID, p = 0.011; 0.13 DID, p = 0.02, respectively) and weight‐for‐height z‐score (0.16 DID, p = 0.038; 0.24 DID, p = 0.002), relative to SOC. There were no differences in child height‐for‐age z‐scores. At endline, the impact was sustained only in the PDH‐IVC group for weight‐for‐age z‐score (0.14 DID, p = 0.049), and the prevalence of underweight declined by 12.8 percentage points (p = 0.036), relative to SOC. Integration of phone‐based IYCF counselling is a potentially promising solution to reduce the burden of in‐person visits; however, the modest improvements suggest the need to combine it with other strategies to improve child nutrition.