Table 3.
The 14 Variables with P < 0.2 following analysis using the Chi-Square Test to assess the relationship between Herd Leptospirosis Status and 62 Variables in 128 herds
| Leptospirosis Status | ||||
|---|---|---|---|---|
| Variable | Measure | Negative (0) | Positive (1) | P-value |
| Region (n = 128) | 1 | 6 | 23 | 0.061 |
| 2 | 8 | 19 | ||
| 3 | 4 | 12 | ||
| 4 | 1 | 13 | ||
| 5 | 0 | 23 | ||
| 6 | 2 | 17 | ||
| Breeding Herd Size (n = 128) | 1(9 to ≤ 13) | 12 | 24 | 0.012 |
| 2 (14 to ≤ 23) | 4 | 26 | ||
| 3 (24 to ≤ 32.5) | 3 | 27 | ||
| 4 (32.6 to ≤ 142) | 2 | 30 | ||
| History of Leptospirosis (n = 128) | No (0) | 19 | 105 | 0.065 |
| Yes (1) | 2 | 2 | ||
| Weak Calves 2003 (n = 90) | No (0) | 16 | 66 | 0.168 |
| Yes (1) | 0 | 8 | ||
| Bull Y/N (n = 125) | No (0) | 9 | 29 | 0.121 |
| Yes (1) | 11 | 76 | ||
| Stock Bull (n = 125) | No (0) | 11 | 30 | 0.021 |
| Yes (1) | 9 | 75 | ||
| Hired/Borrowed Bull (n = 99) | No (0) | 15 | 80 | 0.076 |
| Yes (1) | 2 | 2 | ||
| Buy Rep Breed Animals (n = 118) | No (0) | 15 | 63 | 0.093 |
| Yes (1) | 3 | 37 | ||
| Grazing ≤ 830 acres (n = 124) | No (0) | 19 | 74 | 0.024 |
| Yes (1) | 1 | 30 | ||
| Grazing acres (n = 124) | 1 (5 to ≤ 37) | 7 | 25 | 0.144 |
| 2 (38 to ≤ 60) | 7 | 25 | ||
| 3 (61 to ≤ 86) | 5 | 24 | ||
| 4 (87 to ≤ 830) | 1 | 30 | ||
| %Grazing Wet (n = 121) | 1 (0 to ≤ 3.1) | 2 | 29 | 0.154 |
| 2 (3.2 to ≤ 16.9) | 4 | 26 | ||
| 3 (17 to ≤ 40) | 6 | 25 | ||
| 4 (41 to ≤ 100) | 8 | 21 | ||
| Straw-Bed Shed (n = 95) | No (0) | 11 | 46 | 0.051 |
| Yes (1) | 2 | 36 | ||
| Cows and Heifers Separate at Calving (n = 19) |
No (0) | 1 | 0 | 0.003 |
| Yes (1) | 1 | 17 | ||
| Out-Winter Fed in Fields (n = 30) | No (0) | 1 | 14 | 0.142 |
| Yes (1) | 4 | 11 | ||