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Background: Despite ample food supplies, the incidence of childhood underweight and stunting remains high in Uganda. Many factors contribute to this situation, but the role of low zinc intakes has not been adequately explored., Objective: Our objective was to study the effect of zinc supplementation on growth and body composition of preschool children by using the outcome measures of weight, height, and midupper arm circumference (MUAC)., Design: The study was randomized, double-blind, placebo-controlled, parallel, and 8 mo long, and incorporated 6 mo of zinc supplementation. Children (n = 153) aged 55.8 +/- 11.2 mo from 3 randomly selected nursery schools of medium, low, and very low socioeconomic status in a suburb of Kampala took part. The intervention comprised 10 mg Zn (as ZnSO4) or placebo daily in freshly prepared fruit juice, Monday to Friday inclusive., Results: Zinc supplementation increased MUAC by the end of the study (P = 0.029) and led to greater weight gain in children from the school of medium socioeconomic status at 3 and 8 mo (P = 0.019 and P = 0.038, respectively). There was no effect on weight gain of the children from the other schools. Zinc supplementation had no influence on height. Infection rates (of which 82% were recorded as malaria) were lower in the zinc-supplemented group than in control subjects (P = 0.063)., Conclusions: Zinc supplementation may counter the age-related decrease in MUAC often observed in preschool children in developing countries. The study provides evidence that zinc may not be the most limiting nutrient for weight gain in children of poor nutritional status, but may become so as nutritional status improves.

Objective: To assess the dietary and environmental factors influencing stunting and other signs of poor nutritional status of children <30 months of age in a central Ugandan community, whose main dietary staples are banana (matoki) and maize., Methods: The study was a cross-sectional survey using stratified multistage random sampling to select households with a child <30 months of age in rural and semi-urban environments. A questionnaire was administered to mothers of 261 infants and toddlers in their home setting. Their health status was assessed by clinical examination and anthropometric measurements (mid-upper arm circumference [MUAC], weight, and supine length)., Results: A large minority (21.5%) of the children surveyed were found in poor health after clinical examination: 3.8% being classified as suffering from kwashiorkor and 5.7% with marasmus. A high proportion of children were stunted (23. 8%), underweight (24.1%), or had low MUAC (21.6%). Although rural living, poor health, the use of unprotected water supplies, lack of charcoal as fuel, lack of milk consumption, and lack of personal hygiene were shown as risk factors for marasmus and underweight, different factors were found to be associated with risk of stunting and low MUAC, despite these three parameters being significantly correlated. For stunting the risk factors were: age of the child, poor health, prolonged breastfeeding (from >18 months to <24 months), low socioeconomic status of the family, poor education of the mother of infants <12 months, lack of paraffin as fuel, consumption of food of low energy density (<350 kcal/100 g dry matter), presence of eye pathology, and consumption of small meals. Risk factors for low MUAC were poor health, lack of meat and cow's milk consumption, low intake of energy from fat, and less well educated and older mothers. Food taboos had no influence on any of the anthropometric measurements. Although 93.1% of the children had been immunized against tuberculosis, polio, diphtheria, and measles and showed better general health than children who were not immunized, there was a high prevalence of infection in the week preceding the survey interview, including diarrhea (23.0%), malaria (32.3%), or cough/influenza (72.8%)., Conclusions: This first account of dietary and environmental risk factors involved in the etiology of early childhood malnutrition in Uganda indicates differences in risk factors for marasmus and underweight compared with stunting and low MUAC. The high prevalence of malnutrition and current infection of children in this survey suggests poor immune function as a result of inadequate nutrition.