Farm characteristics and management routines related to cow longevity: a survey among Swedish dairy farmers

Table 4 Final model multiple imputation model of associations between management practices and average herd longevity

Variable	Coefficient	SE	P > t	95% CI
Age of farmer^a (year)	5.45	1.65	0.001	2.21; 8.70
Herd size^a	0.01	0.23	0.977	− 0.44; 0.46
Housing^a
Tie stall	Reference
Free stall	30.55	40.91	0.456	− 50.10; 111.19
Region^ab
South Sweden	Reference
East Sweden	− 49.54	59.77	0.408	− 167.37; 68.29
West Sweden	− 104.32	57.31	0.070	− 217.30; 8.65
Middle Sweden	− 143.15	78.27	0.069	− 297.45; 11.15
North Sweden	− 140.06	64.89	0.032	− 267.98; − 12.14
Call the veterinarian when recognizing unhealthy cows	22.59	8.26	0.007	6.28; 38.91
Interest in animal breeding (genetic selection)	− 21.09	9.87	0.034	− 40.56; − 1.62
Used breeding advisory services during the last year
No	Reference
Yes	116.88	48.34	0.017	21.19; 212.58
Used preventive herd health advisory services during the last year
No	Reference
Yes	− 124.26	43.15	0.005	− 209.48; − 39.04
Intercept	1366.83	144.22

Final model of associations between management practices and average herd longevity (days) following multiple imputation of missing data. The analysis is based on data from 228 herds
^aConfounders forced into the model
^bRegion: overall P-value = 0.13 (Wald test)

ISSN: 1751-0147