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An independent review of the sustainability of Plan CLTS programmes in Africa uncovered a slippage rate of 92%. The study report provides an analysis of factors that lead households to revert to open defecation (OD) and factors that motivate people to remain open defecation free (ODF) + six focus areas for improving CLTS approaches.
A link to the study plus a discussion on its findings can be found on the SuSanA forum.