Table 1.
Variables at district and village level.
| Variable code | District | Village |
|---|---|---|
| PDS-defined H5N1 case | Ratio of PDS defined HPAI cases and non cases (positive and negative visits) | PDS defined HPAI cases and non cases |
| vill_pop | Number of people per district | Number of people per village |
| vill_pop_dens | Number of people per square km | Number of people per square km |
| hpop_rural_log | Log[number of people living rurally] | Log[number of people living rurally] |
| hpop_rural_log2 | Log[number of people living rurally]2 | Log[number of people living rurally]2 |
| hpop_urban_log | Log[number of urbanised people] | Log[number of urbanised people] |
| hpop_urban_log2 | Log[number of urbanised people]2 | Log[number of urbanised people]2 |
| settlement | The number of urban centres in the district | Distance to closest urban centre (km) |
| markets_km | The distance (km) from the middle of the village to the closest urban centre | |
| roadlen | Length of roads (km) | Distance to closest road (km) |
| native_denlog | Log[Backyard chickens per square km] | |
| native_log | Log[Total number of backyard chickens] | |
| brla_dens_log | Log [Commercial poultry (broilers and layers) per square km] | |
| brla_log | Log [Total number of commercial poultry] | |
| duck_denslog | Log[Ducks per square km] | |
| ducks_log | Log[Total number of ducks] | |
| rice_area | Area covered in rice fields (square km) | Area covered in rice fields (square km) |
| cropmax | Number of rice harvests per year | Number of rice harvests per year |
| water_area | Area covered by water (square km) | |
| water_pct | Percentage of water | Percentage of water |
| water_pct2 | [Percentage of water]2 | [Percentage of water]2 |
| vege_area | Area covered in evergreen vegetation (square km) | |
| vege_pct | Percentage of evergreen vegetation | Percentage of permanent vegetation |
| vege pct2 | [Percentage of evergreen vegetation]2 | [Percentage of permanent vegetation]2 |
| elev_avg | Average elevation | Average elevation |
| elev_avg2 | [Average elevation]2 | [Average elevation]2 |
| elev_max | Maximum elevation | Maximum elevation |
| elev_min | Minimum elevation | Minimum elevation |
| elev_range | Elevation Range | Elevation Range |