Table 2 Descriptive statistics of herd variables in the data sets from the national dairy cow recording systems for 1997.
From: Cumulative Risk of Bovine Mastitis Treatments in Denmark, Finland, Norway and Sweden
Number of herds selected | Number of cows included | Number of started lactations | Average number of cows per herd | |
|---|---|---|---|---|
Denmark | 812 | 53,959 | 54,894 | 66.5 |
Finland | 18,887 | 293,781 | 297,355 | 15.6 |
Norway | 3,573 | 55,976 | 56,486 | 15.7 |
Sweden | 2,132 | 73,599 | 74,370 | 34.5 |