From: A case–control study regarding factors associated with digital dermatitis in Norwegian dairy herds
Housing | Free stalls | Tie stalls | ||
---|---|---|---|---|
DD+ (n = 108) | DD− (n = 281) | DD+ (n = 5) | DD − (n = 165) | |
n (%)b | n (%)b | n (%)b | n (%)b | |
Herd sizea | ||||
11.7–30.3 | 8 (7.4) | 69 (24.5) | 2 (40.0) | 146 (88.5) |
30.4–39.8 | 18 (16.7) | 60 (21.4) | 2 (40.0) | 14 (8.5) |
39.9–46.9 | 24 (22.2) | 54 (19.2) | 1 (20) | 3 (4.6) |
47.0–56.4 | 25 (23.1) | 53 (18.9) | 0 | 2 (1.2) |
56.5 or more | 33 (30.6) | 45 (16.0) | 0 | 0 |
Missing | 0 | 0 | 0 | 0 |
Alley-flooring | ||||
Solid concrete | 22 (20.4) | 39 (13.9) | ||
Slatted concrete | 52 (48.1) | 170 (60.7) | ||
Solid rubber | 20 (18.5) | 34 (12.1) | ||
Slatted rubber | 6 (5.6) | 19 (6.8) | ||
Mixed concrete /rubber | 8 (7.4) | 17 (6.1) | ||
Other flooring | 0 | 1 (0.4) | ||
Missing | 0 | 1 | ||
Bedding in cubicles/tie stalls | ||||
Rubber mats | 61 (57.0) | 186 (66.4) | 4 (80.0) | 161 (98.2) |
Mattresses | 39 (36.5) | 77 (27.5) | 1 (20.0) | 2 (1.2) |
Rubber mats and mattresses | 7 (6.5) | 14 (5.0) | 0 | 0 |
Other bedding | 0 | 3 (1.1) | 0 | 1 (0.6) |
Missing | 1 | 1 | 0 | 1 |
Milking systema | ||||
AMS | 96 (88.9) | 222 (79.0) | 1 (20.0) | 0 |
Milking parlour | 12 (11.1) | 57 (20.3) | 0 | 0 |
Pipeline | 0 | 2 (0.7) | 4 (80.0) | 165 (100) |
Missing | 0 | 0 | 0 | 0 |
Milk yield Kga | ||||
4872.3–7863.5 | 20 (18.5) | 57 (20.3) | 3 (60.0) | 98 (59.5) |
7863.6–8403.9 | 13 (12.0) | 65 (23.2) | 0 | 36 (21.8) |
8404–8912.5 | 29 (26.9) | 49 (17.4) | 1 (20.0) | 22 (13.3) |
8912.6–9534.1 | 24 (22.2) | 54 (19.2) | 1 (20.0) | 5 (3.0) |
> 9534.2 | 22 (20.4) | 56 (19.9) | 0 | 4 (2.4) |
Missing | 0 | 0 | 0 | 0 |