Table 2.
Effect of water treatment interventions on child growth among 288 children who completed 24 months of follow-up and had a baseline anthropometric measure
| Intervention | Number of children | Z-score at baseline,mean (SD) | Z-score at 24 months, mean (SD) | ΔZ-score, mean (SD) | Mean ΔZ-score difference,* (95% CI) |
|---|---|---|---|---|---|
| Height-for-age z-score | |||||
| Filter | 70 | −1.08 (1.15) | −1.42 (1.05) | −0.35 (1.20) | 0.06 (−0.29, 0.40) |
| Ceramic tablet | 69 | −1.24 (1.31) | −1.53 (1.12) | −0.29 (1.31) | 0.00 (−0.35, 0.35) |
| Safe storage | 75 | −1.44 (1.13) | −1.63 (1.13) | −0.19 (1.16) | 0.11 (−0.23, 0.44) |
| No intervention | 62 | −1.60 (1.39) | −1.88 (1.29) | −0.28 (1.30) | 0. |
| Combined intervention | 139 | −1.16 (1.23) | −1.48 (1.08) | −0.32 (1.25) | −0.03 (−0.27, 0.21) |
| Combined control | 137 | −1.51 (1.25) | −1.75 (1.20) | −0.23 (1.22) | 0. |
| Weight-for-age z-score | |||||
| Filter | 70 | −0.13 (1.06) | −0.19 (0.95) | −0.06 (0.97) | −0.08 (−0.42, 0.26) |
| Ceramic tablet | 70 | −0.22 (1.21) | −0.05 (0.97) | 0.16 (1.03) | 0.13 (−0.21, 0.46) |
| Safe storage | 79 | −0.40 (1.14) | −0.36 (0.91) | 0.04 (0.94) | −0.04 (−0.36, 0.29) |
| No intervention | 63 | −0.52 (1.26) | −0.48 (1.14) | 0.04 (1.03) | 0. |
| Combined intervention | 140 | −0.17 (1.13) | −0.12 (0.95) | 0.05 (1.01) | 0.04 (−0.19, 0.27) |
| Combined control | 142 | −0.45 (1.19) | −0.41 (1.02) | 0.04 (0.97) | 0. |
| Weight-for-height z-score | |||||
| Filter | 68 | 0.64 (1.23) | 0.93 (1.29) | 0.29 (1.33) | −0.11 (−0.65, 0.43) |
| Ceramic tablet | 68 | 0.63 (1.44) | 1.17 (1.60) | 0.54 (1.75) | 0.13 (−0.41, 0.67) |
| Safe storage | 74 | 0.62 (1.33) | 0.80 (1.34) | 0.18 (1.44) | −0.24 (−0.77, 0.29) |
| No intervention | 60 | 0.49 (1.49) | 0.86 (1.70) | 0.38 (1.72) | 0. |
| Combined intervention | 136 | 0.63 (1.34) | 1.05 (1.46) | 0.41 (1.55) | 0.14 (−0.23, 0.51) |
| Combined control | 134 | 0.56 (1.40) | 0.83 (1.51) | 0.27 (1.57) | 0. |
*
Adjusted for age using cubic splines with 4 knots.