[Comment] Positive steps with negative studies in the WASH sector

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Lancet Global Health
The Lancet Global Health is The Lancet's first gold open-access title and focuses on original research, commentary, correspondence and blogs on topics including maternal and child health, infectious and noncommunicable diseases, mental health, and more. The Editor is Zoë Mullan.

Despite encouraging evidence about the health benefits of individual water, sanitation, and hygiene (WASH) interventions,1,2 much less is known about the benefits of combined or packaged interventions delivered through public-health campaigns and programmes. Rigorous assessment of such combined intervention programmes has many challenges. For example, such assessments usually require a deep understanding of a complicated study design, typically entailing a cluster-randomised trial. These study designs frequently demand large sample sizes and geographically dispersed study units to avoid possible spillover effects that distort the noted estimates of effect.

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[Comment] Positive steps with negative studies in the WASH sector