MISC-CBO: A cluster randomized control trial to improve the mental health of OVC in South Africa

MISC-CBO is a cluster randomized control trial designed to test whether a structured, year-long caregiver-focused video-feedback intervention delivered through community-based organizations (CBOs) can improve mental health outcomes for orphans and vulnerable children (OVC) aged 7–11 in South Africa. The trial responds to a pressing public health need: millions of children in sub-Saharan Africa experience orphanhood, parental illness, and poverty associated with HIV/AIDS, contributing to elevated risk for mental disorders and limited access to mental health services. Given scarce specialist mental health resources across the region, CBOs that already provide services to OVC represent a strategic platform for scalable interventions aimed at strengthening caregiver–child interactions and thereby promoting child mental health.

The intervention, Mediational Intervention for Sensitizing Caregivers adapted for CBOs (MISC-CBO), is a semi-structured, manualized video-feedback program delivered bi-weekly over one year. MISC-CBO targets caregiver behaviors and daily interactions that support social affiliation and attachment, grounding its hypothesized mechanisms in Research Domain Criteria systems relevant to social processes. Prior feasibility work and quasi-experimental studies implementing MISC in CBO settings demonstrated improvements in caregiving quality and child mental health over 12 months, but limitations in design, statistical power, follow-up duration, and implementation assessment prevented definitive causal conclusions or guidance for scale-up.

This study addresses those gaps with a repeated-measures cluster randomized design involving 24 CBOs in two districts of the Free State, South Africa. Each CBO will include 15 children and 3 caseworkers, yielding a sample of 360 children (balanced by sex and age bands within 7–11 years) and 72 caseworkers. CBOs will be randomized to receive either MISC-CBO or treatment as usual (TAU) for one year. TAU services include meals, social-support-focused counselling, financial assistance, and healthcare counseling but do not target caregiving quality specifically. Outcomes will be measured through video-based observations of caseworker caregiving quality and multi-informant assessments of child mental health at baseline, 12 months (end of intervention), 18 months, and 24 months to evaluate both immediate and sustained effects.

The trial has three primary aims. Aim 1 tests the direct effects of MISC-CBO on caregiving quality and child mental health at post-intervention and at later follow-ups. Aim 2 examines mechanisms and moderators: whether improved caregiving mediates long-term child outcomes and whether effects vary by child or household risk factors (for example, orphan status or impoverished home environments). Aim 3 evaluates cost-effectiveness using WHO metrics (e.g., DALYs averted) and assesses implementation climate and readiness through Consolidated Framework for Implementation Research (CFIR) constructs and community stakeholder input. Focus groups with government, NGO/CBO, and university representatives will examine barriers and facilitators for scale-up.

By rigorously testing effectiveness, mechanisms, cost-effectiveness, and implementation readiness in a real-world CBO delivery platform during a critical developmental window, this trial aims to produce evidence that can inform policy and scalable programs to reduce mental health burdens among high-risk children in low-resource settings.