Relationship between herd-level incidence rate of energy-related postpartum diseases, general risk factors and claw lesions in individual dairy cows recorded at maintenance claw trimming

Table 5 Results from the mixed ¹ logistic regression model of risk factors associated with absence of any claw lesion

	Coefficient	CI²	OR³	p- value
Herd classification⁴ × trimming season				0.007
High × Jan-April	Ref		1.00
Low × Jan-April	0.96	−0.62 – 2.53	2.60
Inconsistent-high × Jan-April	1.15	0.03 – 2.27	3.16
High × May-Aug	0.80	0.46 – 1.14	2.23
Low × May-Aug	2.14	0.52 – 3.77	8.52
Inconsistent-high × May-Aug	1.49	0.37 – 2.61	4.43
High × Sept-Dec	0.74	0.50 – 0.98	2.10
Low × Sept-Dec	1.21	−0.32 – 2.74	3.34
Inconsistent-high × Sept-Dec	1.62	0.51 – 2.73	5.05
Herd classification × parity				0.001
High × 1	Ref		1.00
Low × 1	0.54	−1.01 – 2.09	1.71
Inconsistent-high × 1	0.59	−0.52 – 1.70	1.81
High × 2	−0.37	−0.61 – -0.14	0.69
Low × 2	0.62	−0.93 – 2.17	1.86
Inconsistent-high × 2	0.57	−0.54 – 1.68	1.77
High × ≥3	−0.85	−1.08 – -0.62	0.43
Low × ≥3	0.37	−1.18 – 1.93	1.45
Inconsistent-high × ≥3	0.32	−0.79 – 1.43	1.38
Breed				<0.001
Swedish Holstein	Ref		1.00
Swedish Red	0.45	0.26 – 0.64	1.57
Lactation stage				<0.001
≤2 months	Ref		1.00
>2 to 5 months	−0.78	−0.96 – -0.61	0.46
>5 to 10 months	−0.23	−0.39 – -0.07	0.80
>10 months	0.01	−0.17 – 0.19	1.01

¹Herd was included as a random effect.
²95% confidence interval.
³Odds ratio.
⁴Herds classified according to incidence rates of energy related postpartum diseases.

ISSN: 1751-0147