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A review of changing episode definitions and their effects on estimates of diarrhoeal morbidity

Wright, J.A., Gundry, S.W. and Conroy, R. (2007) A review of changing episode definitions and their effects on estimates of diarrhoeal morbidity Journal of Health, Population, and Nutrition, 25, (4), pp. 448-455.

Record type: Article


This paper describes how the methodology used for measuring diarrhoeal morbidity has changed over time and assesses how differences in episode definition have affected estimates of diarrhoeal morbidity among children aged less than five years. The episode definition used in 73 studies included in three previouslypublished literature reviews was identified. In earlier work, a method was developed that adjusts morbidity estimates to take account of differences in episode definition. This adjustment method was applied to the studies identified in these three literature reviews. Episode definitions were better documented and were more consistent in studies published after 1980. Adjusting morbidity estimates to account for definitional differences did not substantially alter the reviews’ conclusions. Diarrhoeal surveillance has steadily improved since 1980, with methodology becoming more consistent between studies and better documented. Although episode definitions have changed over time, the morbidity estimates derived in the three reviews appear robust to these changes.

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Published date: December 2007
Keywords: definition, developing countries, diarrhoea, epidemiology, morbidity
Organisations: PHEW – P (Population Health), Remote Sensing & Spatial Analysis


Local EPrints ID: 55589
ISSN: 1606-0997
PURE UUID: 4bd02e43-fc3f-402a-a1fa-079ebbdba809

Catalogue record

Date deposited: 01 Aug 2008
Last modified: 17 Jul 2017 14:32

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