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Table 2

Baseline and end-line household water contamination outcomes

Baseline
End line – intention-to-treat
End line – per-protocol
Control n = 282Intervention n = 271Control n = 252Intervention n = 236Control n = 265Intervention n = 222
E. coli per 100 mL, MPN (SD) 49.8 (43.9) 50.9 (44.6) 64.9 (43.8) 45.7 (46.1) 67.4 (43.0) 41.8 (45.3) 
MPN per 100 mL, n (%)       
  <1 46 (16.3) 45 (16.6) 32 (12.7) 63 (26.7) 32 (12.1) 63 (28.4) 
 1 to <10 45 (16.0) 44 (16.2) 25 (9.9) 43 (18.2) 23 (8.7) 44 (19.8) 
 10 to <100 77 (27.3) 67 (24.7) 46 (18.3) 36 (15.3) 46 (17.4) 36 (16.2) 
  ≥100 114 (40.4) 115 (42.4) 149 (59.1) 94 (39.8) 164 (61.9) 79 (35.6) 
Baseline
End line – intention-to-treat
End line – per-protocol
Control n = 282Intervention n = 271Control n = 252Intervention n = 236Control n = 265Intervention n = 222
E. coli per 100 mL, MPN (SD) 49.8 (43.9) 50.9 (44.6) 64.9 (43.8) 45.7 (46.1) 67.4 (43.0) 41.8 (45.3) 
MPN per 100 mL, n (%)       
  <1 46 (16.3) 45 (16.6) 32 (12.7) 63 (26.7) 32 (12.1) 63 (28.4) 
 1 to <10 45 (16.0) 44 (16.2) 25 (9.9) 43 (18.2) 23 (8.7) 44 (19.8) 
 10 to <100 77 (27.3) 67 (24.7) 46 (18.3) 36 (15.3) 46 (17.4) 36 (16.2) 
  ≥100 114 (40.4) 115 (42.4) 149 (59.1) 94 (39.8) 164 (61.9) 79 (35.6) 

The MPN of CFUs per 100 mL sample was assessed using the compartment bag test.

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