Mortality and Morbidity of Beef Calves in Free-Range Farms in Alentejo, Portugal—A Preliminary Study

Table 4

Multiple regression model for calf deaths from birth to 30 days ().

	b	Std. Err. of b	b	Std. Err. of b	-Value
Intercept	—	—	−0.86	0.37	0.029
Herd size	0.60	0.20	0.63	0.20	0.005
Diarrhea	−0.10	0.20	−0.07	0.13	0.612
Respiratory disease	0.05	0.17	0.05	0.17	0.768
Sudden deaths	0.28	0.18	0.28	0.18	0.127

b, coefficient; Std. Err., standard error; b, standardized coefficient; values are significant at the level.