Table 3.
Multivariable logistic regression model of the relationship between select sachet water characteristics (n = 60) and any presence of heterotrophic bacteria (THB > 0 CFU/mL)*
| Characteristic | B | SE | OR | 95% CI | P |
|---|---|---|---|---|---|
| Constant | 2.24 | 2.59 | 9.43 | – | 0.386 |
| Neighborhood is Old Tulaku | 0.56 | 1.09 | 1.74 | 0.21–14.69 | 0.609 |
| Good brand reputation | −2.37 | 0.96 | 0.09 | 0.01–0.62 | 0.014 |
| Neighborhood × brand reputation interaction | 0.256 | ||||
| Old Fadama × good (reference) | – | – | – | – | |
| Old Fadama × poor | −1.55 | 1.36 | 0.21 | 0.02–3.07 | 0.256 |
| Old Tulaku × good† | – | – | – | – | |
| Old Tulaku × poor† | – | – | – | – | |
| Vendor type | 0.007 | ||||
| Store (reference) | – | – | – | – | |
| Stall | −0.70 | 0.96 | 0.50 | 0.08–3.27 | 0.467 |
| Mobile | 2.29 | 1.24 | 9.83 | 0.86–112.40 | 0.066 |
| Chilled for purchase | −1.65 | 1.05 | 0.19 | 0.03–1.49 | 0.115 |
| −2LL = 60.90; Nagelkerke R2 = 0.38 | |||||
*
THB = total heterotrophic bacteria; CFU = colony-forming unit; OR = odds ratio; CI = confidence interval.
†
Not estimated because of collinearity.