Managerial and environmental determinants of clinical mastitis in Danish dairy herds

Table 2 Final General Linear Model for the incidence rate of CM.

Variable Description	Code	Values	Correlation coefficient estimate	Type III p-value
Region of Denmark	OMR	Region 5	-5.652	<.0001
		Region 7	-0.196	-
		Region 9	-	-
Who takes care of the cows?	PASSER_1	Husband	-3.349	0.0145
		Wife	-	-
Age of cow house floor	ALDGM_12	Less then 20	-3.907	0.0015
		Over 20 years	-
How do you handle cows with mastitis apart from the veterinary treatment	YVSYG_38	Use Antibiotics	-11.612	0.0086
		Do nothing	-
How do you handle lame cows apart from veterinary treatment	KLOVL_42	Trim & Clean	2.843	0.0308
		Do nothing	-
Diagnostic criteria for CM ⁽¹⁾	SLEMT_57	milk & gland	-5.491	<.0001
		milk only	-
Which cows are trimmed	KLOVH_64	Trim selected cow	-4.140	0.0033
		Trim all cow	-
Approximate what percentage of the cows had claw diseases during the recent year ⁽²⁾	UKLOV_43	% of cows with claw disease	0.367	0.0010
Daily milk production per cow ⁽³⁾	MILK	Kg/day/cow	1.256	<.0001

(1) Diagnostic criteria was forced into the multivariable analysis
(2) When claw disease increased by 10%, the mastitis incidence rate was increased by 3.67 cases/100-cow years.
(3) When milk production increased by 10 kg, the mastitis incidence rate was increased by 12.56 cases/100-cow years.

ISSN: 1751-0147