|
Risk factors
|
Number of cows examined
|
CMT
|
Bacteriology
|
|---|
|
Number of positive
|
Crude odds ratio (95% CI)
|
Adjusted odd ratio (95% CI)
|
Number of positive
|
Crude odds ratio (95% CI)
|
Adjusted odd ratio (95% CI)
|
|---|
|
Body condition score
|
|
Poor
|
7
|
3
|
1
|
1
|
3
|
1
|
1
|
|
Medium
|
198
|
77
|
0.86 (0.18–3.97)
|
0.74 (0.13–4.03)
|
74
|
0.79 (0.17–3.65)
|
0.70 (0.13–3.77)
|
|
Good
|
57
|
25
|
0.96 (0.19–4.73)
|
0.73 (0.12–4.37)
|
24
|
0.96 (0.19–4.73)
|
0.72 (0.12–4.26)
|
|
Milk yield (litres)
|
|
≥ 15
|
106
|
39
|
1
|
1
|
36
|
1
|
1
|
|
< 15
|
156
|
66
|
1.25 (0.75–2.09)
|
2.06 (0.95–4.44)
|
65
|
1.38 (0.83–2.31)
|
2.32 (1.05–5.08)a
|
|
Age (years)
|
|
[2–6)
|
163
|
51
|
1
|
1
|
49
|
1
|
1
|
|
[6–9)
|
81
|
41
|
2.25 (1.30–3.89)a
|
1.63 (0.76–3.53)
|
39
|
2.16 (1.24–3.74)a
|
1.48 (0.67–3.23)
|
|
≥ 9
|
18
|
13
|
5.70 (1.93–16.86)a
|
1.86 (0.39–8.73)
|
13
|
6.04 (2.04–17.8)a
|
1.79 (0.37–8.46)
|
|
Parity
|
|
1–3
|
204
|
68
|
1
|
1
|
65
|
1
|
1
|
|
4–6
|
53
|
32
|
3.04 (1.63–5.68)a
|
2.34 (0.91–5.97)
|
31
|
3.01 (1.61–5.60)
|
2.39 (0.93–6.18)
|
|
≥ 7
|
5
|
5
|
–
|
–
|
5
|
–
|
–
|
-
aSignificant associations
