Explanatory variable | Variable defined |
---|---|
Triplet Code | Treatment in the Random Badger Culling Trial (RBCT) |
Restocked | Herd was depopulated due to the foot-and-mouth (FMD) epidemic in 2001 |
Geographical area (farm location) | Geographical area, which the farm was situated in, categorised as Area A-(Gloucestershire, Herefordshire/Worcestershire), Area B-(northeast Devon, south Somerset), Area C-(northwest Devon, northeast Cornwall) |
Cattle age (years) | In yearly intervals from 2 years old up to 10 years and over |
Herd size | Taken from the VetNet database the average number of cattle present in the herd during the study period |
Birthplace of replacement cattle | Cattle were homebred (tested in natal herd) or purchased (tested in herd different from natal herd) |
Dairy cattle | Yes or no dairy cattle were present in the herd |
Grower cattle | Yes or no grower cattle were present in the herd |
Season | Time when visit took place. Winter (December, January and February), Spring (March, April and May), Summer (June, July and August) and Autumn (September, October and November) |