Undernutrition in relation to childhood infections: a prospective study in the Sudan

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Abstract
Objective: The aim of the study was to examine the relationships between nutritional status and diarrhoea and respiratory infections. Design: Prospective cohort study within the framework of a randomized double-blind placebo-controlled intervention trial. Setting: In rural communities in the Khartoum and Gezira regions, in Northern Sudan. Subjects: 28, 753 Sudanese pre-school children between 6 months and 6 y old. Methods: Relative risks of subsequent diarrhoea and respiratory infections in relation to nutritional status measured by anthropometry (Z-scores of height-for-age (H/A), weight-for-height (W/H), and weight-for-age (W/A), which reflect stunting, wasting and underweight, respectively) were estimated using odds ratios from logistic regression adjusting for various covariates. Results: H/A, W/H and W/A were significantly and inversely associated with subsequent diarrhoea and febrile diarrhoea (P for trend Z-scores below −4 Z, and 1.75 times higher (95% CI (1.56, 1.96)) among those with a W/A Z-score between −4 and −3 Z compared with children having a W/A Z-score ≥1. Age, gender, region of residence and seasonality modified these associations. Also, febrile cough was inversely associated with W/A and W/H (PZ-scores below −4 and between −2 and −1 Z, all compared with normally nourished children (≥−1 Z). Conclusions: The reduction of severe but also mild and moderate undernutrition is necessary through nutrition, health and socio-economic improvement in order to prevent morbidity. Sponsorship: This study was carried out under cooperative agreement no. DAN-00450G-SS-6067 of the Office of Nutrition, US Agency for International Development, Washington DC, and the Harvard Institute for International Development. European Journal of Clinical Nutrition (2000) 54, 463–472

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