Table 4.

Class effects and covariates associated with initial response, booster response, overall response, and final antibody titer for bovine viral diarrhea virus type 1 (BVDV1), bovine viral diarrhea virus type 2 (BVDV2), bovine respiratory syncytial virus (BRSV), and bovine herpesvirus 1 (BHV1)

Item	Initial response	Booster response	Overall response	Final antibody level
BVDV1
Year–season	0.05	0.0823	0.0047	<0.0001
Sex	0.3856	0.904	0.984	0.9507
Pink eye	0.6824	0.2001	0.116	0.013
Dam age	0.0034	0.0256	0.0024	0.029
Wean	0.2726	0.0526	0.0004	0.0022
Titer	0.2605	<0.0001	<0.0001	<0.0001
Titer × titer	<0.0001	<0.0001	<0.0001	<0.0001
Age(year–season)	<0.0001	<0.0001	0.0003	<0.0001
ADG	0.0015	0.7861	0.7427	–1
BVDV2
Year–season	0.0007	<0.0001	<0.0001	<0.0001
Sex	0.8879	0.0573	0.2283	0.2379
Pink eye	0.0055	0.2236	0.0195	0.0181
Dam age	0.0518	<0.0001	<0.0001	<0.0001
Wean	<0.0001	0.0746	0.0012	0.0005
Titer	<0.0001	<0.0001	<0.0001	<0.0001
Titer × titer	<0.0001	<0.0001	<0.0001	<0.0001
Age(year–season)	<0.0001	<0.0001	<0.0001	<0.0001
ADG	0.3792	0.3478	0.1834	–
BRSV
Year–season	<0.0001	<0.0001	<0.0001	<0.0001
Sex	0.0311	0.1712	0.2633	0.2362
Pink eye	0.1375	0.5948	0.766	0.9354
Dam age	0.6456	0.04	0.0002	<0.0001
Wean	0.5632	<0.0001	<0.0001	<0.0001
Titer	<0.0001	<0.0001	<0.0001	0.4414
Titer × titer	0.931	0.585	0.1151	0.124
Age(year–season)	<0.0001	<0.0001	<0.0001	<0.0001
ADG	0.9364	0.1578	0.958	–
BHV1
Year–season	<0.0001	<0.0001	<0.0001	<0.0001
Sex	0.0751	0.7596	0.4038	0.4557
Pink eye	0.0128	0.6701	0.6821	0.7563
Dam age	<0.0001	0.0352	0.0021	0.0002
Wean	0.0004	<0.0001	<0.0001	<0.0001
Titer	<0.0001	<0.0001	<0.0001	<0.0001
Titer × titer	0.7269	0.8379	<0.0001	<0.0001
Age(year–season)	<0.0001	<0.0001	<0.0001	<0.0001
ADG	0.3721	0.387	0.2336	–

¹“–” = not tested for column trait.