This Campbell Systematic Review examines the effectiveness of different approaches for promoting handwashing and sanitation behaviour change, and factors affecting implementation, in low and middle‐income countries. The review summarises evidence from 42 impact evaluations, and from 28 qualitative studies.
Community‐based approaches which include a sanitation component can increase handwashing with soap at key times; use of latrines and safe disposal of faeces; and reduce the frequency of open defecation. Social marketing seems less effective. The approach mainly shows an effect on sanitation outcomes when interventions combine handwashing and sanitation components.
Sanitation and hygiene messaging with a focus on handwashing with soap has an effect after the intervention has ended, but there is little impact on sanitation outcomes. However, these effects are not sustainable in the long term. Using elements of psychosocial theory in a small‐scale handwashing promotion intervention, or adding theory‐based elements such as infrastructure promotion or public commitment to an existing promotional approach, seem promising for handwashing with soap.
None of the approaches described have consistent effects on behavioural factors such as knowledge, skills and attitude. There are no consistent effects on health.
Plain language summary
Community‐based approaches are most effective in promoting changes in hygiene practices, but sustainability is a challengeCommunity‐based approaches to promote handwashing and sanitation efforts seem to work better than social marketing, messaging and interventions based on psychosocial theory. Programs combining hygiene and sanitation measures appears to have a larger impact than either one alone.
What is this review about?Diarrhoeal diseases are very common causes of death in low and middle‐income countries. Improved sanitation and hygiene reduce diarrhoea, but adoption remains a challenge.This review assesses the evidence for two questions: (1) how effective are different approaches to promote handwashing and sanitation behaviour change; and (2) what factors influence the implementation of these approaches?
What studies are included?Studies of effectiveness had to be impact evaluations using an experimental or quasi‐experimental design and analytical observational studies. Implementation studies used qualitative designs.Forty‐two quantitative studies and 28 qualitative studies met the inclusion criteria. The quantitative studies were conducted in LMICs worldwide, with the majority of the studies in South Asia and Sub‐Saharan Africa.
What are the main findings of this review?Community‐based approaches which include a sanitation component can increase handwashing with soap at key times; use of latrines and safe disposal of faeces; and reduce the frequency of open defecation. Social marketing seems less effective. The approach mainly shows an effect on sanitation outcomes when interventions combine handwashing and sanitation components.Sanitation and hygiene messaging with a focus on hand...