Abstract：
:Child stunting is a global problem and is only modestly responsive to dietary interventions. Numerous observational studies have shown that water quality, sanitation, and handwashing (WASH) in a household are strongly associated with linear growth of children living in the same household. We have completed three randomised efficacy trials testing improved household-level WASH with and without improved infant and young child feeding (IYCF) on stunting and diarrhoea in Bangladesh, Kenya, and Zimbabwe. In all trials, improved IYCF had a statistically significant benefit, but WASH had no effect on linear growth. In observational analyses of data from the control groups of the three trials, baseline sanitation was a strong risk factor for stunting in the study populations, suggesting this frequently reported association might be confounded by unmeasured factors of household wellbeing. WASH interventions reduced diarrhoea in Bangladesh, but not in Kenya or Zimbabwe. Intervention promoters visited participants six times per month in Bangladesh compared with monthly in Kenya and Zimbabwe; a review of the literature shows that virtually all published studies that have reported an effect on diarrhoea through home-based water treatment and handwashing promotion achieved high adherence by visiting participants at daily to fortnightly intervals. Despite achieving substantial behavioural change and significant reduction in infection prevalence for some enteric pathogens, detection of enteropathogens among children in the WASH groups of the trials was typically at ten times higher prevalence compared with high-income countries. Considering these results, we recommend that future research in the WASH sector focus on developing and evaluating interventions that are radically more effective in reducing faecal contamination in the domestic environment than the interventions implemented in these trials.
journal_name
Lancet Glob Healthjournal_title
The Lancet. Global healthauthors
Pickering AJ,Null C,Winch PJ,Mangwadu G,Arnold BF,Prendergast AJ,Njenga SM,Rahman M,Ntozini R,Benjamin-Chung J,Stewart CP,Huda TMN,Moulton LH,Colford JM Jr,Luby SP,Humphrey JHdoi
10.1016/S2214-109X(19)30268-2subject
Has Abstractpub_date
2019-08-01 00:00:00pages
e1139-e1146issue
8issn
2214-109Xpii
S2214-109X(19)30268-2journal_volume
7pub_type
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