Table 5 Incidence rates (IRs) estimated by a Poisson model for clinical mastitis (CM) cases as registered in four Nordic countries’ national common disease databases (CoDDs) for cattle, and recorded by farmers, with excess cases in the CoDDs added (adjusted FRD)
IR (95% CI) – cases per 100 cow-years | Denmark | Finland | Norway | Sweden |
|---|---|---|---|---|
CoDD | 39.4 (35.4; 43.9) | 19.3 (16.4; 22.8) | 23.2 (19.8; 27.3) | 17.5 (14.9; 20.6) |
Adjusted FRD; all cases | 46.9 (41.7; 52.7) | 38.6 (34.2; 43.5) | 31.3 (27.2; 35.9) | 26.2 (23.2; 29.6) |
Adjusted FRD; veterinary- visited cases | 42.1 (37.4; 47.5) | 34.7 (30.6; 39.4) | 28.1 (24.3; 32.6) | 22.6 (19.7; 25.8) |