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Table 1 Information on the datasets and the variables considered for creating the final dataset for a study on Fasciola hepatica infection in Danish cattle herds

From: Prevalence, risk factors and spatial analysis of liver fluke infections in Danish cattle herds

Abattoir dataset Herd information dataset Environment dataset Trade dataset
(n = 1,499,417 cattle) (n = 23,859 herds) (n = 22,092 farms) (n = 19,593 herds)
Farm characteristics: Farm identification number; Farm coordinates Farm characteristics: Farm identification number Farm characteristics: Farm identification number; Farm coordinates Trade characteristics: Purchase of an animal from another herd (0 = No, 1 = Yes); Purchase of an animal from an infected herd (0 = No; 1 = Yes; NA = Unknown4)
Animal characteristics: Animal identification number; Sex; Date of birth; Date of Slaughter; F. hepatica status of the animal at slaughter Count day: Herd size recording date (beginning of every calendar month from 2005 to 2013) Environmental variables 3 (0 = Absent, 1 = Present): Streams, Wetlands; Lakeshore; Cropland; Pastures; Grasslands; Forests; Artificial surface; Recreation land; Grass; Farmland; Forest; Dry-land; Fresh-water meadows; Ocean Animal characteristics: F. hepatica status of the animal at slaughter (0 = Negative, 1 = Positive)
Herd Characteristics: Herd identification number; Farm type (Organic, Conventional); Production type: (Dairy, Non-dairy herds1) Herd characteristics: Total number of bulls < 6 months of age; Total number of bulls > 6 months of age; Total number of heifers < 6 months of age; Total number of heifers > 6 months; Total number of cows; mean and median herd size2   Herd Characteristics: Herd identification number; Median herd size
  1. 1Non-dairy herds = Includes large and small beef herds, heifer raising herds, large and small veal production herds.
  2. 2Herd size = Total number of bulls below 6 months of age + number of bulls above 6 months of age + total number of heifers below 6 months of age + total number of heifers above 6 months + total number of cows.
  3. 3Environmental variables = Located within 500 square meters around each farm; source: CORINE database (2000).
  4. 4Unknown = Status of the herd from which the animal was purchased is not known and or included herds that did not trade with other herds.