Variable | Category | No. of animals | No. positive to gamma interferon | % positive to gamma interferon | p-value |
---|---|---|---|---|---|
Age (years) | 0.5–1 | 807 | 65 | 8.1 | 0.059 |
2 | 351 | 28 | 8.0 | ||
3–4 | 334 | 32 | 9.6 | ||
≥ 5 | 665 | 74 | 11.1 | ||
Region | NE | 204 | 17 | 8.3 | 0.029 |
NW | 995 | 59 | 5.9 | ||
SE | 398 | 20 | 5.0 | ||
SW | 560 | 103 | 18.4 | ||
Month | 4 | 185 | 10 | 5.4 | 0.043 |
5 | 212 | 13 | 6.1 | ||
6 | 266 | 26 | 9.8 | ||
7 | 273 | 13 | 4.8 | ||
8 | 319 | 31 | 9.7 | ||
9 | 273 | 15 | 5.5 | ||
10 | 479 | 73 | 15.2 | ||
11 | 102 | 14 | 13.7 | ||
12 | 48 | 4 | 8.3 | ||
Breed1 | AA | 280 | 21 | 7.5 | 0.408 |
BB | 88 | 7 | 8.0 | ||
CH | 497 | 38 | 7.6 | ||
FR | 412 | 62 | 15.0 | ||
HE | 130 | 17 | 13.1 | ||
LM | 404 | 31 | 7.7 | ||
SH | 54 | 2 | 3.7 | ||
SI | 198 | 11 | 5.6 | ||
Other | 94 | 10 | 10.6 | ||
Herd type | Beef | 307 | 35 | 11.4 | 0.072 |
Dairy | 569 | 85 | 14.9 | ||
Mixed | 20 | 1 | 5.0 | ||
Suckler | 1261 | 78 | 6.2 | ||
Gender | Female | 1671 | 170 | 10.2 | 0.108 |
Male | 486 | 29 | 6.0 | ||
Animal class2 | Bull | 38 | 3 | 7.9 | 0.206 |
Cow | 1119 | 116 | 10.4 | ||
Heifer | 550 | 54 | 9.8 | ||
Steer | 448 | 26 | 5.8 |