Amongst children under five years, the effect was not quite statistically significant for all pooled studies designs (RR 0.83, 95% CI 0.68 to 1.02, 11 studies, 25,614 participants, Analysis 1.2 ), or in either cluster‐RCTs or non‐randomized studies on their own (Analyses 1.2.1, 1.2.2).
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However, the effect of the intervention was borderline significant for the combined intervention arm when considering 14‐day recall of diarrhoea (2.1 percentage points decline in diarrhoea (95% CI ‐0.4 to 4.6) compared to a control group mean of 16.8%).