Table 6.
Mixed-effects logistic regression model on determinants of malaria infection
| Variable | Unadjusted | Adjusted | ||
|---|---|---|---|---|
| OR | (95% CI) | OR | (95% CI) | |
| Gender | ||||
| Male | 1.22 | (1.11, 1.34)*** | 1.16 | (1.05, 1.29)** |
| Female | 1.00 | 1.00 | ||
| Age category (years) | ||||
| 0–5 | 1.00 | 1.00 | ||
| 6–9 | 1.13 | (0.96, 1.33) | 1.5 | (1.25, 1.79)*** |
| 10–15 | 1.56 | (1.31, 1.85)*** | 1.24 | (1.03, 1.5)** |
| > 15 | 0.37 | (0.29, 0.46)*** | 0.32 | (0.25, 0.4)*** |
| Usage of mosquito net | ||||
| No | 1.00 | 1.00 | ||
| Yes | 0.75 | (0.67, 0.83)*** | 0.74 | (0.66, 0.84)*** |
| Subject groupa | ||||
| Schoolchildren | 2.26 | (2.02, 2.53)*** | – | |
| General community | 1.00 | 1.00 | ||
| Season (round of survey) | ||||
| Round 1 (August: dry and cool) | 1.61 | (1.4, 1.84)*** | 1.98 | (1.71, 2.3)*** |
| Round 2 (November: short rains) | 1.71 | (1.49, 1.96)*** | 1.92 | (1.65, 2.24)*** |
| Round 3 (February: dry and hot) | 1.00 | 1.00 | ||
| Round 4 (May: long rains) | 1.56 | (1.36, 1.79)*** | 1.69 | (1.45, 1.96)*** |
| Villagea | ||||
| Komtonga | 25.14 | (19.56, 32.3)*** | – | |
| Mkindo | 10.89 | (8.52, 13.92)*** | – | |
| Mbogo | 8.96 | (6.99, 11.48)*** | – | |
| Dihombo | 5.76 | (4.48, 7.41)*** | – | |
| Luhindo | 4.9 | (3.8, 6.33)*** | – | |
| Dakawa | 3.34 | (2.56, 4.36)*** | – | |
| Mtibwa | 1.00 | |||
| Water shaded area | ||||
| High | 13.3 | (10.59, 16.71)*** | 15.77 | (6.66, 37.36)*** |
| Medium–Low | 4.66 | (3.7, 5.88)*** | 4.81 | (2.03, 11.4)*** |
| Dry | 1.00 | 1.00 | ||
| Ecosystema | ||||
| Savannah | 10.94 | (8.73, 13.71)*** | 1.00 | – |
| Rice-irrigation | 4.12 | (3.24, 5.24)*** | – | |
| Sugarcane | 1.00 | 1.00 | – | |
***p < 0.001, **p < 0.01
aNot included in the multiple regression model due to high correlation or multicollinearity