Hock lesions in dairy cows in freestall herds: a cross-sectional study of prevalence and risk factors

Table 3 Cow- and herd-related factors associated with mild hock lesions (HL) in the final multivariable mixed-effect logistic regression model including 2447 cows in 79 Swedish dairy herds

Variables and categories	β	SE	OR	CI	P-value
Intercept	− 0.18	0.33			0.579
Breed
Swedish Holstein (SH)	Ref
Swedish Red (SR)	− 0.29	0.12	0.74	0.59–0.94	0.012
SH × SR	− 0.24	0.20	0.78	0.53–1.15	0.215
Days in milk (DIM)
0–90	Ref
91–180	0.30	0.12	1.35	1.05–1.72	0.017
181–305	0.72	0.13	2.06	1.59–2.66	< 0.001
> 305	0.30	0.17	1.35	0.97–1.88	0.074
Bedding material
Peat	Ref
Sawdust	0.87	0.28	2.39	1.38–4.12	0.002
Straw	0.63	0.30	1.88	1.04–3.40	0.035
Combination	0.95	0.37	2.60	1.25–5.39	0.011
Cubicle base
Rubber mat	Ref
Mattress	− 0.42	0.13	0.66	0.51–0.84	0.001
Heifers > 17 months not inseminated (%)^a
0–16	Ref
≥ 17	− 0.49	0.13	0.61	0.48–0.79	< 0.001
Type of milking parlor
Herringbone	Ref
Tandem	− 0.28	0.13	0.75	0.59–0.97	0.027

β regression coefficients, OR odds ratio, CI 95% confidence interval, Ref reference level
^aBased on data from herd performance indicators from the Swedish Official Milk Recording Scheme

ISSN: 1751-0147