Fig 1.
PRISMA diagram of search and included articles.
Table 1.
Research articles published January 1990- December 2021 where the acceptability of water, sanitation or hygiene intervention was evaluated, by year–non-randomized designs.
Table 2.
Research articles published January 1990- December 2021 where the acceptability of water, sanitation or hygiene intervention was evaluated, by year–randomized designs.
Fig 2.
Definitions of acceptability of water, sanitation and hygiene interventions published 1990–2021 (including explicit and implicit definitions).
Venn diagram is not to scale.