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© 1992 Oxford University Press

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Excreta Disposal Behaviour and Latrine Ownership in Relation to the Risk of Childhood Diarrhoea in Sri Lanka

THIERRY E MERTENS*,, SHABBAR JAFFAR*, MALCOLM A FERNANDO**, SIMON N COUSENS* and RICHARD G FEACHEM{dagger}

*Maternal and Child Epidemiology Unit, Department of Epidemiology and Population Sciences, London School of Hygiene and Tropical Medicine Keppel Street, London WCI E7HT, UK
**Department of Community Medicine, Faculty of Medicine, University of Peradenyia Peradenyia, Sri Lanka
{dagger}Tropical Health Epidemiology Unit, Department of Epidemiology and Population Sciences, London School of Hygiene and Tropical Medicine

Reprint requests to: Dr Thierry E Mertens, Chemin des Vergers, 01210 Maccourex (Ferney), France

A case-control study of environmental and behavioural risk factors for childhood diarrhoea was conducted in Kuninegata district, Sn Lanka. Frorn five hospitals, 2458 children aged less than 5 years and suffering from diarrhoea were recruited as clinic cases, and a further 4140 reporting with complaints other than diarrhoea were recniited as clinic controls. Community-based cross-sectional surveys were also conducted in three of the five areas served by these hospitals, and from these a further 1659 children were recruited as community controls. Children from households where excreta were reported to be disposed of In a latrine were less likely to have diarrhoea than children whose families improperly disposed of excreta. The results obtained from comparisons of cases with clinic controls (adjusted odds ratio [OR] 1.42, 95% confidence interval [CI] 1.01–1.98), and of cases with community controls (OR 1.35, 95% Cl: 0.85–2.13) were in agreement, suggesting that no important selection bias operated on this association. If the observed proportion (91%) of improper excreta disposal among the population could be reduced to 50%, 12% of childhood diarrhoea episodes would be prevented. Although latrine ownership may be a necessary con dition for safe excreta disposal behaviour, diarrhoeal morbidity may only be reduced in Sri Lanka if behavioural changes take place concomitant with the construction of sanitation facilities.

Revised 1 May 1992


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