Table 1. Potential risk factors considered to have associations with FL submission and confirmation from animals slaughtered in Irish factories from 2014–2018.

Risk factors	Categories
Factory	Per factory
Year	Per year slaughter (2014–2018)
Month of slaughter	Per month (January–December)
Animal-related factors
Age (year)	Per year category (1 to ≥ 8 years)
Sex	Male; Female
Animal movement	Homebred; Purchased
Breed	Cross breed; Pure breed
Ever inconclusive	Yes; No
Ever severe inconclusive	Yes; No
Herd-related factors
Herd type	Beef; Dairy; Others; Suckler;
Herd size	Log transformed
BTB history (past 3 years)	Yes; No