Category | Parameters | Unit | Range | Baseline (March–May, 2015) | End-line (June 2016) | Effect of SG- intervention (95% CI) | p-value | Effect of combined intervention (SG+) (95% CI) | p-value | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Control n (%) | SG- intervention n (%) | Combined intervention (SG + N + WASH) n (%) | Control n (%) | SG-intervention n (%) | Combined intervention (SG+) n (%) | ||||||||
Linear model (continuous outcome) | |||||||||||||
Physical characteristics | Turbidity | NTU | > 5 | 7 (3) | 3 (4) | 0 (0) | 46 (20) | 26 (31) | 23 (32) | 0.53 | 0.58 | ||
2–5 | 223 (97) | 81 (96) | 73 (100) | 184 (80) | 58 (69) | 50 (68) | (−0.70–1.77) | 0.4 | (−0.82–1.99) | 0.42 | |||
pH | 6.5–8.5 | 230 (100) | 84 (100) | 73 (100) | 230 (100) | 84 (100) | 73 (100) | ||||||
Chemical characteristics | Free residual chlorine | mg/l | 0.3–0.5 | 0 (0) | 0 (0) | 0 (0) | 42 (18) | 26 (31) | 18 (25) | 0.02 | 0.01 | ||
0.1–0.2 | 230 (100) | 84 (100) | 73 (100) | 188 (82) | 58 (69) | 55 (75) | (−0.01–0.06) | 0.26 | (−0.03–0.05) | 0.78 | |||
Total residual chlorine | mg/l | ≥0.5 | 0 (0) | 0 (0) | 0 (0) | 225 (98) | 80 (95) | 73 (100) | −0.01 | 0.02 | |||
0.2–0.49 | 230 (100) | 84 (100) | 73 (100) | 2 (1) | 0 (0) | 0 (0) | (−0.03–0.04) | 0.7 | (−0.02–0.05) | 0.35 | |||
0–0.19 | 0 (0) | 0 (0) | 0 (0) | 3 (1) | 4 (5) | 0 (0) | |||||||
Microbiological characteristics | Thermotole-rant coliforms | CFU/100 ml | 0 | 170 (74) | 68 (81) | 68 (93) | 171 (74) | 59 (70) | 52 (71) | −5.33 | −0.99 | ||
1–10 | 37 (16.) | 10 (12) | 5 (7) | 9 (4) | 13 (15) | 4 (5) | (−34.6–23.9) | 0.72 | (−33.2–31.3) | 0.95 | |||
11–100 | 14 (6) | 4 (5) | 0 (0) | 16 (7) | 4 (5) | 7 (10) | |||||||
> 100 | 9 (4) | 2 (2) | 0 (0) | 34 (15) | 8 (10) | 10 (14) |