Effects of school-based physical activity and multi-micronutrient supplementation intervention on growth health and well-being of schoolchildren in three African countries: the KaziAfya cluster randomised controlled trial protocol with a 2 × 2 factorial design

摘要

Overview of the planned study design ( . MMNS = multi-micronutrient supplementation; PA = physical activity; STH = soil-transmitted helminth; T2 = 9-month follow-up; T3 = 21-month follow-up). All children receive health and nutritional education during the 2-year study period 4