Table 2 Prevalence and odds ratio by parity or calving season
Clinical mastitis | Peracute mastitis | Metabolic disorder | Peripartum disorder | ||||||
|---|---|---|---|---|---|---|---|---|---|
N | Mean | Odd ratio (95%CIa) | Mean | Odd ratio (95%CIa) | Mean | Odd ratio (95%CIa) | Mean | Odd ratio (95%CIa) | |
Parity | |||||||||
1 | 2025 | 17.0 | Reference | 4.2 | Reference | 1.7 | Reference | 3.3 | Reference |
2 | 2565 | 27.4 | 1.94 (1.67–2.24) | 11.7 | 3.11 (2.43–4.00) | 2.2 | NSb | 3.4 | NSb |
3 | 2163 | 33.1 | 2.44 (2.09–2.83) | 16.5 | 4.65 (3.63–5.96) | 4.6 | 3.32 (2.23–4.94) | 5.3 | 1.46 (1.06–2.01) |
4 | 1370 | 31.9 | 2.29 (1.93–2.70) | 18.0 | 5.19 (4.00–6.74) | 5.0 | 3.86 (2.53–5.88) | 4.2 | NSb |
≥ 5 | 1540 | 33.0 | 2.46 (2.08–2.89) | 19.3 | 5.69 (4.40–7.35) | 6.7 | 5.67 (3.79–8.48) | 4.2 | NSb |
Calving seasonc | |||||||||
Spring | 2179 | 26.7 | NSb | 12.1 | NSb | 3.5 | 1.55 (1.10–2.18) | 2.9 | NSb |
Summer | 2445 | 27.6 | 12.5 | 0.79 (0.67–0.94) | 5.1 | 2.12 (1.55–2.88) | 5.3 | 1.52 (1.15–2.01) | |
Autumn | 2619 | 27.8 | 12.8 | 0.79 (0.67–0.93) | 3.7 | 1.46 (1.06–2.02) | 4.2 | NSb | |
Winter | 2420 | 29.7 | 15.7 | Reference | 2.7 | Reference | 3.5 | Reference | |