Table 1.
Breed, age, stage of lactation and other findings in 1982 cows with LDA, RDA and AV
| Variable | Finding | LDA | RDA | AV | Total | Chi2 | Additional tests | P |
|---|---|---|---|---|---|---|---|---|
| Age (n = 1982) | Mean/median | 4.7/4.6a | 4.8/4.4ab | 4.4/4.0c | 4.7/4.4 | NA | KW, BoCo | < 0.05 |
| SD (25–75th pc) | 1.9 (3.0–6.0) | 2.1(3.3–5.8) | 1.8 (3.0–5.2) | 1.9 (3.0–6.0) | ||||
| Breed (n = 1982) | Holstein | 806a (60.1%) | 181b (53.6%) | 168ab (55.4%) | 1155 (58.3%) | 36** | Boph | < 0.05 |
| Swiss Fleckvieh | 433 (32.3%) | 104 (30.8%) | 102 (33.7%) | 639 (32.2%) | ||||
| Brown Swiss | 71a (5.3%) | 49b (14.5%) | 26c (8.6%) | 146 (7.4%) | ||||
| Other | 31 (2.3%) | 4 (1.2%) | 7 (2.3%) | 42 (2.1%) | ||||
| Stage of lactation (n = 1750) | Weeks 1 and 2 | 628a (50.7%) | 155a (57.8%) | 95b (38.9%) | 878 (50.2%) | 33** | Boph | < 0.05 |
| Weeks 3 and 4 | 405a (32.7%) | 66b (24.6%) | 77ab (31.6%) | 548 (31.3%) | ||||
| > 4 weeks | 205a (16.6%) | 47a (17.5%) | 72b (29.5%) | 324 (18.5%) | ||||
| Gestation stage (n = 1960) | Open or less than 5 weeks | 1234a (92.6%) | 265b (79.1%) | 231b (78.8%) | 1730 (88.3%) | 82** | Boph | < 0.05 |
| 2–7 months | 62a (4.7%) | 42b (12.5%) | 46b (15.7%) | 150 (7.7%) | ||||
| 8–9 months | 36a (2.7%) | 28b (8.4%) | 16b (5.5%) | 80 (4.1%) | ||||
| Duration of illness | Mean/median | 4.5/3.0a | 3.0/2.0b | 2.8/2.0b | 3.9/3.0 | NA | KW, BoCo | < 0.05 |
| (days) (n = 1450) | SD (25–75th pc) | 3.7 (2.0–7.0) | 2.5 (1.0–3.0) | 2.1 (1.0–4.0) | 3.4 (2.0–5.0) |
KW Kruskal Wallis test, BoCo Bonferroni correction, Boph bonferroni post hoc test, pc percentiles, NA not applicable,
**P < 0.01, within rows, values with different superscripts differ (P < 0.05)