Variable | Factor | Unadjusted IRR (95% CI) | P-value | Adjusted IRR (95% CI) | P-value |
---|---|---|---|---|---|
Season and distance from uninhabited areas | Dry season > 250 m | Reference | Reference | Reference | Reference |
Dry season and ≤ 250 m | 1.77 (0.79–3.94) | 0.119 | 1.82 (0.81–4.10) | 0.147 | |
Wet season and > 250 m | 1.95 (0.84–4.54) | 0.164 | 2.06 (0.88–4.81) | 0.096 | |
Wet season and ≤ 250 m | 2.06 (0.97–4.39) | 0.061 | 2.14 (0.99–4.59) | 0.051 | |
Age of index case | < 5 years | Reference | Reference | Reference | Reference |
5–15 years | 1.20 (0.76–1.88) | 0.432 | 1.20 (0.76–1.89) | 0.441 | |
> 15 years | 1.36 (0.88–2.11) | 0.164 | 1.37 (0.88–2.12) | 0.163 | |
Sex of index case | Female | Reference | Reference | Reference | Reference |
Male | 1.22 (0.85–1.76) | 0.287 | 1.20 (0.83–1.74) | 0.342 | |
Index case travelled in the past month | None | Reference | Reference | Reference | Reference |
Outside Lusaka | 0.81 (0.48–1.37) | 0.437 | 0.76 (0.44–1.29) | 0.302 |