Table 3 Effects of intervention during follow-up on household-level drinking water quality outcomes.

1^a

≥2 CFU/100 mL (any detectable E. coli contamination)

69.9% (649/929)

87.0% (730/839)

0.80 (0.74, 0.87)

<0.001

2^a

≥10 CFU/100 mL (Moderate and higher E. coli contamination)

49.3% (458/929)

74.7% (627/839)

0.66 (0.58, 0.75)

<0.001

3^a

≥100 CFU /100 mL (Very high E. coli contamination)

22.4% (208/929)

39.8% (334/839)

0.56 (0.46, 0.68)

<0.001

4^b

≥2 CFU/100 mL (any detectable E. coli contamination)

69.8% (644/923)

87.2% (728/835)

0.80 (0.74, 0.87)

<0.001

5^b

≥10 CFU/100 mL (Moderate and higher E. coli contamination)

49.2% (454/923)

75.0% (626/835)

0.65 (0.57, 0.74)

<0.001

6^b

≥100 CFU /100 mL (Very high E. coli contamination)

22.4% (207/923)

39.9% (333/835)

0.56 (0.46, 0.68)

<0.001