Cited by 428Child Nutrition and Water AccessGlobal Maternal and Child HealthViral gastroenteritis research and epidemiology

Impact of drinking water, sanitation and handwashing with soap on childhood diarrhoeal disease: updated meta-analysis and meta-regression

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Wolf, Jennyfer, Hunter, Paul R., Freeman, Matthew C., Cumming, Oliver, Clasen, Thomas, Bartram, Jamie, Higgins, Julian P. T., Johnston, Richard +3 more·2018·Tropical Medicine & International Health

Abstract

OBJECTIVES: Safe drinking water, sanitation and hygiene are protective against diarrhoeal disease; a leading cause of child mortality. The main objective was an updated assessment of the impact of unsafe water, sanitation and hygiene (WaSH) on childhood diarrhoeal disease. METHODS: We undertook a systematic review of articles published between 1970 and February 2016. Study results were combined and analysed using meta-analysis and meta-regression. RESULTS: A total of 135 studies met the inclusion criteria. Several water, sanitation and hygiene interventions were associated with lower risk of diarrhoeal morbidity. Point-of-use filter interventions with safe storage reduced diarrhoea risk by 61% (RR = 0.39; 95% CI: 0.32, 0.48); piped water to premises of higher quality and continuous availability by 75% and 36% (RR = 0.25 (0.09, 0.67) and 0.64 (0.42, 0.98)), respectively compared to a baseline of unimproved drinking water; sanitation interventions by 25% (RR = 0.75 (0.63, 0.88)) with evidence for greater reductions when high sanitation coverage is reached; and interventions promoting handwashing with soap by 30% (RR = 0.70 (0.64, 0.77)) vs. no intervention. Results of the analysis of sanitation and hygiene interventions are sensitive to certain differences in study methods and conditions. Correcting for non-blinding would reduce the associations with diarrhoea to some extent. CONCLUSIONS: Although evidence is limited, results suggest that household connections of water supply and higher levels of community coverage for sanitation appear particularly impactful which is in line with targets of the Sustainable Development Goals.

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  1. Borenstein M, Hedges L, Higgins JP, Rothstein HR. Part 5: complex data structures. Introduction to Meta-Analysis, 1st ed. Chichester, UK: John Wiley & Sons, Ltd; 2009. pp. 213-245.
  2. Aziz KMA, Hoque BA, Hasan KZ et al. Reduction in diar- rhoeal diseases in children in rural Bangladesh by © 2018 World Health Organization; licensed by WHO Published by John Wiley & Sons Ltd. 523 Tropical Medicine and International Health volume 23 no 5 pp 508-525 may 2018
  3. Borenstein M, Hedges L, Higgins JP, Rothstein HR. Chap- ter 16: identifying and quantifying heterogeneity. Introduc- tion to Meta-Analysis. Chichester, UK: Wiley; 2009. p. 357-364.

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Authors
Wolf, J., Hunter, P. R., Freeman, M. C., Cumming, O., Clasen, T., Bartram, J., Higgins, J. P. T., Johnston, R., Medlicott, K., Boisson, S., & Prüss‐Ustün, A.
Affiliations
  • World Health Organization (CH)
  • University of East Anglia (GB)
  • Emory University (US)
  • London School of Hygiene & Tropical Medicine (GB)
  • University of North Carolina at Chapel Hill (US)
  • University of Bristol (GB)
  • Department of Public Health, Environment and Social Determinants of Health WHO Geneva Switzerland
Venue
Tropical Medicine & International Health
Publisher
Wiley
Published
2018-04-23
Volume
23
Issue
5
Pages
508-525
ISSN
  • 1360-2276 (ISSN-L)
  • 1365-3156
OpenAlex
W2791078272
Cited by
403
References
68
Citations by year
2026: 34 · 2025: 30 · 2024: 28 · 2023: 56 · 2022: 61 · 2021: 73 · 2020: 63 · 2019: 47 · 2018: 10 · 2016: 1
FWCI
6.19
Type
journal article
Language
en
Open access
Locations
  • Tropical Medicine & International Health (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • UEA Digital Repository (University of East Anglia) (acceptedVersion)
  • LSHTM Research Online (London School of Hygiene and Tropical Medicine) (acceptedVersion)
  • Bristol Research (University of Bristol) (submittedVersion, cc-by)
  • Explore Bristol Research (submittedVersion, cc-by)
Funders
  • Department for International Development, UK Government
  • Unilever
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Child Nutrition and Water Access
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Global Maternal and Child Health
  • Health Sciences › Medicine › Infectious Diseases › Viral gastroenteritis research and epidemiology
Keywords
childhood diarrhea, drinking water, sanitation, handwashing with soap, water, sanitation and hygiene interventions, point-of-use water filters, piped water supply, household water connections, sanitation coverage, child mortality
MeSH terms
Child, Developing Countries, Diarrhea, Female, Hand Disinfection, Humans, Hygiene, Male, Risk Factors, Socioeconomic Factors, Water Supply, Drinking Water

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