Figure 5. RCT difference-in-differences analysis matched on baseline E. coli contamination.
This analysis includes only the subset of communities where the sampling location remained the same between baseline and end-line (communities N = 47). The model shows no effect of the intervention on microbial water quality (the error bars on the coefficient ‘difference in difference in E. coli CFU concentration between 2010 and 2015 between treatment and control sites’ overlaps zero). The coefficients and confidence intervals are presented in Table S5.