Journal
BRITISH MEDICAL JOURNAL
Volume 323, Issue 7326, Pages 1389-1393Publisher
BRITISH MED JOURNAL PUBL GROUP
DOI: 10.1136/bmj.323.7326.1389
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Objective To measure the effects of iron supplementation and anthelmintic treatment on iron status, anaemia, growth, morbidity, mid development of children aged 6-59 months. Design Double blind, placebo controlled randomised factorial trial of iron supplementation and anthelmintic treatment. Setting Community in Pemba Wand, Zanzibar. Participants 614 preschool children aged 6-59 months. Main outcome measures Development of language and motor skills assessed by parental interview before and after treatment in age appropriate Subgroups. Results Before intervention, anaemia was prevalent and severe, and geohelminth infections were prevalent and light-Plasmodium falciparum infection was nearly universal. Iron supplementation significantly improved iron status, but not haemoglobin status. Iron supplementation improved language development by 0.8 (95% confidence interval 0.2 to 1.4) points on the 20 point scale. Iron supplementation also improved motor development, but this effect was modified by baseline haemoglobin concentrations (P = 0.015 for interaction term) and was apparent only in children with baseline haemoglobin concentrations < 90 g/l. In children with a baseline haemoglobin concentration of 68 g/l (one standard deviation below the mean value), iron treatment increased scores by 1.1 (0.1 to 2.1) points on the 18 point motor scale. Mebendazole significantly reduced the number and severity of infections caused by Ascaris lumbricoides and Trichuris trichiura, but not by hookworms. Mebendazole increased development scores by 0.4 (-0.3 to 1.1) points on the motor scale and 0.3 (-0.3 to 0.9) points on the language scale. Conclusions Iron Supplementation improved motor and language development of preschool children in rural Africa. The effects of iron on motor development were limited to children with more severe anaemia (baseline haemoglobin concentration < 90 g/l). Mebendazole had a positive effect on motor and language development. but this was not statistically significant.
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