Table 3.
Impact of nets on prevalence of any parasitaemia (logistic regression analysis: final model also included stunting, no access to covered wells, and sex)
| Variable | No (%) of children with parasitaemia | Geometric mean for parasite density | Adjusted odd ratio (95% CI) | χ2 test (P value)* |
|---|---|---|---|---|
| No net | 132/189 (70) | 4404 | Reference group | |
| Untreated net | 115/233 (49) | 2890 | 0.49 (0.24 to 1.00) | |
| Treated net | 120/326 (37) | 2745 | 0.38 (0.23 to 0.62) | 8.75 (0.013) |
| Use of net in past month | 107/315 (34) | 3291 | 0.53 (0.35 to 0.79) | 6.69 (0.010) |
| Ethnic group: | ||||
| Ndamba | 49/136 (36) | 3901 | Reference group | |
| Pogoro | 76/114 (67) | 3423 | 3.78 (1.62 to 8.87) | |
| Hehe | 42/97 (43) | 4315 | 1.53 (0.74 to 3.16) | |
| Other | 209/409 (51) | 3070 | 2.48 (1.27 to 4.84) | 14.63 (0.002) |
| Age (months): | ||||
| 0-6 | 17/61 (28) | 2040 | Reference group | |
| 7-12 | 106/245 (43) | 2710 | 3.00 (0.95 to 9.44) | |
| 13-18 | 114/204 (56) | 4111 | 3.64 (1.31 to 10.14) | |
| >18 | 140/248 (56) | 3622 | 4.85 (1.57 to 14.96) | 13.4 (0.004) |
| Religion: | ||||
| Other than Muslim or Catholic | 52/127 (41) | 4434 | Reference group | |
| Muslim | 157/267 (59) | 2967 | 2.40 (1.32 to 4.35) | |
| Catholic | 159/351 (45) | 3404 | 1.54 (1.00 to 2.37) | 8.85 (0.012) |
CI=confidence interval. *Likelihood ratio test.