Table 2 Factors associated with malaria parasite prevalence or antibody prevalence
| Â | Parasite prevalence | Antibody prevalence | ||
|---|---|---|---|---|
| Â | ORa | Adjusted OR (95Â % CI)a | ORa | Adjusted OR (95Â % CI)a |
Individual characteristics | ||||
Age (Â years) | ||||
 ≤5 | 1 (reference) | 1 (reference) | 1 (reference) | 1 (reference) |
 6–10 | 1.27 (1.13–1.42) | 1.26 (1.10–1.46) | 1.88 (1.71–2.06) | 2.35 (2.10–2.63) |
 11–15 | 1.22 (1.07–1.39) | 1.25 (1.08–1.47) | 3.51 (3.17–3.89) | 4.70 (4.15–5.33) |
 16–25 | 0.92 (0.81–1.04) | 0.89 (0.76–1.04) | 4.57 (4.13–5.07) | 6.57 (5.79–7.46) |
 ≥26 | 0.64 (0.57–0.73) | 0.61 (0.53–0.71) | 4.33 (3.97–4.72) | 6.05 (5.43–6.73) |
Bed net use | 0.79 (0.71–0.88) | 0.82 (0.72–0.93) | 0.85 (0.79–0.93) | 0.89 (0.81–0.98) |
House structure | ||||
 Mud wall | 1.46 (1.25–1.71) | 1.26 (1.05–1.50) | 1.14 (1.03–1.27) |  |
 Open eaves | 1.25 (1.10–1.41) | 1.16 (1.01–1.34) | 1.28 (1.17–1.39) | 1.33 (1.21–1.46) |
Environment | ||||
Distance to water | ||||
 <250 m | 1 (reference) |  | 1 (reference) | 1 (reference) |
 250–500 m | 1.04 (0.89–1.22) |  | 0.97 (0.87–1.09) | 1.04 (0.92–1.19) |
 500–999 m | 0.83 (0.71–0.96) |  | 0.66 (0.59–0.74) | 0.91 (0.80–1.03) |
 1000 m+ | 0.78 (0.62–0.98) |  | 0.44 (0.38–0.52) | 0.81 (0.67–0.97) |
Altitude (m) | ||||
 1350–1449 | 1 (reference) | 1 (reference) | 1 (reference) | 1 (reference) |
 1450–1499 | 0.63 (0.55–0.72) | 0.84 (0.72–0.98) | 0.83 (0.75–0.91) | 0.90 (0.81–1.01) |
 1500–1549 | 0.52 (0.45–0.61) | 0.68 (0.56–0.81) | 0.57 (0.51–0.64) | 0.79 (0.69–0.89) |
 1550–1650 | 0.25 (0.17–0.37) | 0.43 (0.28–0.66) | 0.28 (0.23–0.35) | 0.71 (0.56–0.90) |
Parasite prevalence 500 m radius | 1.06 (1.05–1.06) | 1.07 (1.06–1.07) | 1.03 (1.02–1.03) |  |
Antibody prevalence 500 m radius | 1.02 (1.02–1.03) |  | 1.04 (1.03–1.04) | 1.04 (1.03–1.04) |
TWI (minimum) |  |  | 1.91 (1.70–2.16) | 1.23 (1.06–1.41) |
TWI (mean) |  |  | 2.16 (1.94–2.41) |  |
TWI (maximum) | 1.03 (1.01–1.05) | 0.97 (0.95–1.00) | 1.09 (1.07–1.10) |  |