Table 2.
Multivariable zero‐inflated negative binomial regression model comprising nine risk factors for child food contamination, out of characteristics of 58 caregivers and their households in Maputo, Mozambique
| Logistic portion | ||||
|---|---|---|---|---|
| Risk factor | Coefficienta | z | 95% CI | p value |
| Soap available—Yes (ref: No) | 20 | 20 | [18, 22] | <.01 |
| HWWS after cleaning nappies—Yes (ref: No) | 21 | 16 | [18, 24] | <.01 |
| Type of food—Salad (ref: Not salad) | −21 | −15 | [−24, −18] | <.01 |
| Food stored after cooking (ref: Cooked and not stored; not calculated: Uncooked food) | −22 | −20 | [−24, −19] | <.01 |
| Food stored in covered container (ref: Stored uncovered; not calculated: Not stored after cooking) | 20 | 20 | [18, 23] | <.01 |
| Constant | −20 | −22 | [−22, −18] | <.01 |
| Negative binomial portion | ||||
|---|---|---|---|---|
| Risk factors | Coefficientb | z | 95% CI | p value |
| Type of food—Porridge (ref: Not porridge) | −3.2 | −1.7 | [−6.9, 0.59] | .10 |
| Type of food—Cooked vegetables (ref: Not cooked vegetables) | 1.1 | 1.5 | [−0.36, 2.5] | .14 |
| Food refrigerated (ref: Stored at ambient temperature;not calculated: Not stored) | −25 | −3.0 | [−42, −8.8] | <.01 |
| Wealth quintile—2nd (ref: 1st quintile; not calculated: 3rd, 4th, 5th quintile) | −2.7 | −1.1 | [−7.6, 2.1] | .27 |
| Constant | 6.4 | 12 | [5.3, 7.4] | <.01 |
Abbreviations: CI, confidence interval; HWWS, handwashing with soap.
a
Coefficient relates to the increase in log odds of excess zeros.
b
Coefficient relates to the increase in log count.