Table 1 Mean monthly cumulative incidence of subclinical ketosis at the study dairy farm (N = 7511)
From: Cumulative incidence of ketosis in fresh lactating cows: a case study in the United Arab Emirates
Risk factors | Category | No. of tested cows | No. of positive for SCK | % ± SEM | χ2 | p value |
|---|---|---|---|---|---|---|
Study year (N = 7511) | 2019 | 1699 | 352 | 20.7 ± 0.98 | 247.029 | < 0.0001 |
2020 | 1763 | 220 | 12.5 ± 0.79 | |||
2021 | 1983 | 119 | 6.0 ± 0.53 | |||
2022 | 2066 | 147 | 7.1 ± 0.57 | |||
Season (N = 7511) | Summer | 1942 | 193 | 9.9 ± 0.68 | 75.578 | < 0.0001 |
Autumn | 2119 | 189 | 8.9 ± 0.62 | |||
Winter | 1706 | 289 | 16.9 ± 0.91 | |||
Spring | 1744 | 167 | 9.6 ± 0.71 | |||
Body score (N = 6377) | 1.0–3.0 | 1917 | 219 | 11.4 ± 0.73 | 2.306 | 0.316 |
3.1–4.0 | 3401 | 433 | 12.7 ± 0.57 | |||
4.1–5.0 | 1059 | 137 | 12.9 ± 1.0 | |||
Parity (N = 7511) | Parity 1 | 2819 | 198 | 7.0 ± 0.48 | 224.95 | < 0.0001 |
Parity 2 | 2238 | 179 | 8.0 ± 0.57 | |||
Parity 3 | 1134 | 197 | 17.4 ± 1.1 | |||
Parity 4 | 671 | 142 | 21.2 ± 1.6 | |||
Parity 5 | 326 | 68 | 20.9 ± 2.3 | |||
Parity 6 | 182 | 33 | 18.1 ± 2.9 | |||
Parity 7 | 141 | 21 | 14.9 ± 3.0 |