Spillover Effects of Water, Sanitation, and Hygiene Interventions on Child Health
NCT ID: NCT02396407
Last Updated: 2016-10-26
Study Results
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Basic Information
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COMPLETED
NA
1789 participants
INTERVENTIONAL
2015-01-31
2016-05-31
Brief Summary
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Detailed Description
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It is possible that WASH interventions affect not only those who receive them but also those who are geographically proximate or connected socially to those receiving the intervention. Indeed, there is a large infectious disease modeling literature based on this premise. Investigators define intervention effects on non-recipients "spillovers", and they are often referred to as "herd effects" or "indirect effects". Most studies that have empirically measured spillovers of child health interventions with an experimental design have focused on vaccines and deworming, and no studies have measured spillovers from WASH interventions. The development and application of methodology for measuring spillovers of community interventions empirically would make a valuable contribution to fields including epidemiology, economics, political science, and social welfare, all of which are concerned with measuring the impact of programs and interventions which may spill over. The presence and magnitude of positive spillovers are important; if spillovers are present and are in the same direction as treatment effects but are not accounted for when estimating treatment effects, estimates will be biased towards the null. As a result, both the efficacy and cost effectiveness of the intervention will be underestimated.
In this study, investigators will measure spillovers of water, sanitation, and hygiene interventions in an existing, large, rigorously designed trial: the WASH Benefits trial (https://clinicaltrials.gov/ct2/show/NCT01590095). Funded by the Bill \& Melinda Gates Foundation, this trial aims to measure the individual and combined effects of water, sanitation, and hygiene interventions on child health and development. It is a cluster-randomized, controlled trial with six treatment arms and a double-sized control arm carried out in rural Bangladesh. This add-on study is funded by the National Institute for Child Health and Human Development (1R21HD076216-01A1). Investigators hypothesize that children who live in close proximity to compounds that receive a combined sanitation, handwashing, and water treatment intervention--compared to children who live in close proximity to control compounds (no intervention)--will have: 1) lower prevalence of diarrhea, 2) lower prevalence and intensity of infection of soil transmitted helminths, and 3) lower prevalence of respiratory illness.
Investigators will collect additional data from the existing combined intervention (sanitation+handwashing+water) and control arms of the WASH Benefits trial. For each WASH Benefits household, investigators will locate the nearest household with children 0-59 months of age that are not enrolled in WASH Benefits and collect data in that household. Our primary outcomes are soil transmitted helminth infection among children 0-59 months, caregiver-reported 7-day diarrhea, and respiratory illness among children 0-59 months (the same age as the WASH Benefits cohort). Our findings will document either the presence or absence of spillovers of the combined sanitation+handwashing+water intervention.
Conditions
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Keywords
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Study Design
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RANDOMIZED
PARALLEL
PREVENTION
SINGLE
Study Groups
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Combined water, sanitation, and hygiene
Water quality, Sanitation, Handwashing
Combined water, sanitation, and hygiene
Water: Free chlorine tablets (Aquatabs; NaDCC) and safe storage vessel to treat and store drinking water.
Sanitation: Free child potties, sani-scoop hoes to remove feces from household, and latrine upgrades to a dual pit latrine for all households in study compounds.
Handwashing: Handwashing stations including soapy water bottles and detergent soap.
Local promoters visit study compounds at least monthly to deliver behavior change messages that focus on (1) treating drinking water for children \< 36 months of age, (2) use of latrines for defecation and the removal of human and animal feces from the compound, and (3) handwashing with soap at critical times around food preparation, defecation, and contact with feces.
Non-intervention arm
None. Households will continue their usual practices.
No interventions assigned to this group
Interventions
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Combined water, sanitation, and hygiene
Water: Free chlorine tablets (Aquatabs; NaDCC) and safe storage vessel to treat and store drinking water.
Sanitation: Free child potties, sani-scoop hoes to remove feces from household, and latrine upgrades to a dual pit latrine for all households in study compounds.
Handwashing: Handwashing stations including soapy water bottles and detergent soap.
Local promoters visit study compounds at least monthly to deliver behavior change messages that focus on (1) treating drinking water for children \< 36 months of age, (2) use of latrines for defecation and the removal of human and animal feces from the compound, and (3) handwashing with soap at critical times around food preparation, defecation, and contact with feces.
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
* Children who live in compounds (baris) that share a courtyard with a compound enrolled in the WASH Benefits study
* Children who live in compounds (baris) that share a latrine or handwashing station with a compound enrolled in the WASH Benefits study
60 Months
ALL
Yes
Sponsors
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International Centre for Diarrhoeal Disease Research, Bangladesh
OTHER
Stanford University
OTHER
Bill and Melinda Gates Foundation
OTHER
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
University of California, Berkeley
OTHER
Responsible Party
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Principal Investigators
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John M Colford, Jr., MD PhD
Role: PRINCIPAL_INVESTIGATOR
University of California, Berkeley
Locations
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International Centre for Diarrhoeal Disease Research, Bangladesh
Dhaka, , Bangladesh
Countries
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References
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Arnold BF, Null C, Luby SP, Unicomb L, Stewart CP, Dewey KG, Ahmed T, Ashraf S, Christensen G, Clasen T, Dentz HN, Fernald LC, Haque R, Hubbard AE, Kariger P, Leontsini E, Lin A, Njenga SM, Pickering AJ, Ram PK, Tofail F, Winch PJ, Colford JM Jr. Cluster-randomised controlled trials of individual and combined water, sanitation, hygiene and nutritional interventions in rural Bangladesh and Kenya: the WASH Benefits study design and rationale. BMJ Open. 2013 Aug 30;3(8):e003476. doi: 10.1136/bmjopen-2013-003476.
Lin A, Arnold BF, Afreen S, Goto R, Huda TMN, Haque R, Raqib R, Unicomb L, Ahmed T, Colford JM, Luby SP. Household environmental conditions are associated with enteropathy and impaired growth in rural Bangladesh. Am J Trop Med Hyg. 2013 Jul;89(1):130-137. doi: 10.4269/ajtmh.12-0629. Epub 2013 Apr 29.
Sultana R, Mondal UK, Rimi NA, Unicomb L, Winch PJ, Nahar N, Luby SP. An improved tool for household faeces management in rural Bangladeshi communities. Trop Med Int Health. 2013 Jul;18(7):854-60. doi: 10.1111/tmi.12103. Epub 2013 Apr 5.
Hulland KR, Leontsini E, Dreibelbis R, Unicomb L, Afroz A, Dutta NC, Nizame FA, Luby SP, Ram PK, Winch PJ. Designing a handwashing station for infrastructure-restricted communities in Bangladesh using the integrated behavioural model for water, sanitation and hygiene interventions (IBM-WASH). BMC Public Health. 2013 Sep 23;13:877. doi: 10.1186/1471-2458-13-877.
Dreibelbis R, Winch PJ, Leontsini E, Hulland KR, Ram PK, Unicomb L, Luby SP. The Integrated Behavioural Model for Water, Sanitation, and Hygiene: a systematic review of behavioural models and a framework for designing and evaluating behaviour change interventions in infrastructure-restricted settings. BMC Public Health. 2013 Oct 26;13:1015. doi: 10.1186/1471-2458-13-1015.
Vujcic J, Ram PK, Hussain F, Unicomb L, Gope PS, Abedin J, Mahmud ZH, Islam MS, Luby SP. Toys and toilets: cross-sectional study using children's toys to evaluate environmental faecal contamination in rural Bangladeshi households with different sanitation facilities and practices. Trop Med Int Health. 2014 May;19(5):528-36. doi: 10.1111/tmi.12292. Epub 2014 Mar 19.
Ercumen A, Naser AM, Unicomb L, Arnold BF, Colford JM Jr, Luby SP. Effects of source- versus household contamination of tubewell water on child diarrhea in rural Bangladesh: a randomized controlled trial. PLoS One. 2015 Mar 27;10(3):e0121907. doi: 10.1371/journal.pone.0121907. eCollection 2015.
Related Links
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WASH Benefits Bangladesh ClinicalTrials.gov Registration
Description of the design and rationale for WASH Benefits (open access article)