Table 1.
List of Abbreviations for Three Indices of HPAI H5N1 Persistence and 14 Explanatory Variables
| Code | Definition | Unit |
|---|---|---|
| Hc | Presence of human cases | Binary (0 or 1) |
| HcP | Presence of human cases for more than 1 year over the study period | Binary (0 or 1) |
| PrS | No. of seasons (winter, spring, summer, and autumn) with HPAI H5N1 reports either in poultry, wild birds, or mammals, including humans, expressed as a proportion of total season no. since the recorded introduction of HPAI H5N1 | Proportion (between 0 and 1) |
| AgPopDn | Agricultural population density | People/km2 |
| AgPopDnOI | Agricultural population density by output/input chicken | Sqrt(AgPopDn × OICh) |
| ChDn | Chicken density | Heads/km2 |
| ChMtDn | Chicken meat density | Kg/km2 |
| DuChDn | Duck density by chicken density | Sqrt(DuDn × ChDn) |
| DuDn | Duck density | Heads/km2 |
| OICh | Chicken production output/input | Meat kg/head |
| PopDn | Total human population density | People/km2 |
| Pppc | Purchasing power per capita | USD/person |
| Tmax | Maximum temperature | °C |
| Tmin | Minimum temperature | °C |
| Trng | Range of temperature | °C |
| UrPopDn | Urban population density | People/km2 |
| UrRt | Proportion of urban population | Proportion |