Prevalence of Lameness in Dairy Cows and Associated Risk Factors at Hawassa Town Dairy Farms, Ethiopia

Table 3

Univariable logistic regression analysis of risk factors for the occurrence of lameness in Hawassa city dairy farms.

Risk factors	Level of factors	Number of animals visited	Number of positive animals (%)	Std. err.	COR	95% CI	value
Milking status	Nonmilking	275	9 (3.3%)	—	—	—	—
	Milking	165	36 (21.8%)	0.388	0.121	0.057–0.259	<0.001
Exercise	Allow to exercise	249	22 (8.8%)	—	—	—	—
	Not allowed to exercise	191	23 (12%)	0.315	1.413	0.762–2.620	0.273
Age	<2 years	163	1 (0.6%)	—	—	—	—
	>2 years	277	44 (15.9%)	1.016	0.033	0.004–0.240	0.001
Parity	None	233	1 (0.4%)	—	—	—	—
	One	31	7 (22.6%)	1.019	61.755	8.380–455.114	<0.001
	≥2	176	37 (21%)	0.468	0.913	0.365–2.282	0.845
Milk yield	None	275	9 (3.3%)	—	—	—	—
	4 litre	43	5 (11.6%)	0.584	0.257	0.082–0.808	0.020
	4–8 litre	78	14 (17.9%)	0.449	0.155	0.64−0.373	<0.001
	8–16 litre	35	13 (37.1%)	0.487	0.057	0.022–0.149	<0.001
	>16 litre	9	4 (44.4%)	0.752	0.042	0.010–0.185	<0.001
Lactation stage	Nonlactating	275	9 (3.3%)	—	—	—	—
	<2 months	43	7 (16.3%)	0.534	0.174	0.061–0.496	0.001
	2–6 months	54	16 (29.6%)	0.451	0.80	0.033–0.195	<0.001
	6–9 months	35	6 (17.1%)	0.562	0.164	0.054–0.492	0.001
	>9 months	33	7 (21.2%)	0.544	0.126	0.043–0.365	<0.001