Measure | Categorization | Unadjusted IRR (95% CI) | Adjusted IRR (95% CI) |
---|---|---|---|
Topographical position index 270Â m | Flat | Reference | Reference |
Valley | 1.115 (0.916–1.442) | 1.019 (0.733–1.417) | |
Ridge | 1.268* (1.034–1.554) | 1.590* (1.106–2.286) | |
Lower slope | 0.994 (0.780–1.268) | 1.211 (0.893–1.645) | |
Upper slope | 1.872*** (1.496–2.341) | 1.979*** (1.521–2.573) | |
Topographical position index 4950Â m | Flat | Reference | Reference |
Valley | 1.000 (0.817–1.224) | 1.032 (0.780–1.365) | |
Ridge | 0.962 (0.782–1.183) | 0.576** (0.419–0.792) | |
Lower slope | 0.732** (0.583–0.919) | 0.654** (0.491–0.871) | |
Upper slope | 1.398** (1.152–1.696) | 1.153 (0.909–1.462) | |
Enhanced vegetation index lagged 4Â weeks | <0.5 | Reference | Reference |
≥0.5 | 1.668** (1.209–2.328) | 1.291 (0.894–1.865) | |
Median enhanced vegetation index | <0.25 | Reference | Reference |
≥0.25 | 1.740*** (1.512–2.002) | 1.259* (1.049–1.513) | |
Altitude | ≤1100 m | Reference | Reference |
>1100 m | 1.442*** (1.252–1.661) | 0.949 (0.783–1.151) | |
Wetness index | ≤10.2 (drier) | Reference | Reference |
>10.2 (wetter) | 1.061 (0.918–1.225) | 1.432*** (1.198–1.712) | |
Convergence index | ≤0 (wetter) | Reference | Reference |
>0 (drier) | 1.030 (0.897–1.184) | 0.811* (0.665–0.989) | |
Index case travelled | No travel in previous 2Â weeks | Reference | Reference |
Travel in previous 2 weeks | 0.898 (0.789–1.188) | 0.776 (0.544–1.106) | |
Timeliness of case investigation | Same week as incident case | Reference | Reference |
At least 1 week following incident case | 1.381* (1.072–1.780) | 1.211 (0.905–1.621) | |
Gender of index case | Female | Reference | Reference |
Male | 1.329** (1.132–1.560) | 0.943 (0.765–1.162) | |
Travel among individuals in community tested | No travel in previous 2Â weeks | Reference | Reference |
Any travel in previous 2 weeks | 0.670*** (0.587–0.766) | 0.805* (0.668–0.969) | |
Age of index case | >15Â years old | Reference | Reference |
5–15 years old | 0.898 (0.740–1.091) | 0.862 (0.685–1.085) | |
<5 years old | 0.761 (0.565–1.025) | 0.686* (0.484–0.973) |