Table 1. Weights and relationships extracted from the literature-based MCDA by Stevens et al. ¹⁴ and applied to the Thailand dataset.

	Weight	Relationship between the factor and HPAI H5N1 suitability
Density of waterfowls	0.3768	Sigmoidal, monotonically increasing relationship between 0 and 1000 heads/km2 with constant risk thereafter.
Density of chickens	0.0385	Quadratic relationship with highest risk associated with medium density of chickens (500–5000 heads/km2), and lowest risk associated with both low (0–500 heads/km2) and high (>5000 heads/km2) chicken densities.
Human population density	0.2472	Positive linear relationship
Proximity to roads	0.1574	Sigmoidal, monotonically decreasing relationship with greatest risk within 0–5 km of a road, decreasing risk thereafter and negligible risk after 60 km.
Proximity to water	0.1149	Highest risk close (0–5 km) to open water and thereafter decreased in a sigmoidal, monotonic fashion with negligible risk after 10 km
Proximity to rice	0.0652	Highest risk close (0–5 km) to areas suitable for rice growing and thereafter decreased in a sigmoidal, monotonic fashion with negligible risk after 10 km