Table 3.
Ordinary least-squares regression of change in log mean E. coli contamination of stored water and hands between baseline and first follow-up survey
| Mean (SD) value for full sample | Model 1: change in stored water contamination (log CFU/100 mL) | Model 2: change in hand contamination (log CFU/2 hands) | |
|---|---|---|---|
| Intercept | – | 1.59 (0.22) | 2.22 (0.29) |
| Member of hand cohort (dummy) | 0.24 (0.43) | 0.17 (0.20) | 0.40* (0.14) |
| Member of water cohort (dummy) | 0.31 (0.46) | −0.08 (0.20) | 0.17 (0.18) |
| Member of hand/water cohort (dummy) | 0.22 (0.42) | −0.03 (0.21) | 0.30 (0.20) |
| Received high water test result (dummy) | 0.15 (0.36) | 0.30 (0.24) | – |
| Baseline E. coli level (log CFU) | Water: 1.36 (0.98); hand: 3.20 (0.93) | −1.04† (0.08) | −0.81† (0.07) |
| Reported improved water storage (dummy) | 0.26 (0.44) | 0.05 (0.15) | – |
| Reported increased water treatment (dummy) | 0.26 (0.44) | −0.11 (0.16) | – |
| Reported increased handwashing frequency (dummy) | 0.24 (0.42) | −0.27‡ (0.16) | −0.14 (0.16) |
| Reported increased use of soap (dummy) | 0.47 (0.50) | 0.09 (0.14) | −0.30* (0.13) |
| Completed education beyond primary level (dummy) | 0.22 (0.42) | −0.41* (0.16) | 0.05 (0.16) |
| Adjusted R2 | – | 0.49 | 0.37 |
| N | – | 238 | 240 |
Negative coefficients indicate reduction in mean contamination. SD = standard deviation.
*
P ≤ 0.01.
†
0.01 < P ≤ 0.05.
‡
0.05 < P ≤ 0.10.