Table 2.

Significance for fixed effects relating to initial antibody titer, prevaccination antibody titer, and maternal decay for bovine viral diarrhea virus type 1 (BVDV1) and bovine viral diarrhea virus type 2 (BVDV2)¹

Item	Initial	Before vaccination	Decay
BVDV1
Year–season	<0.0001	0.0012	0.471
Dam age	<0.0001	<0.0001	0.0012
Sex	0.2431	0.2201	0.9292
Birth weight	0.0006	0.0012	–2
Age(year–season)	<0.0001	<0.0001	0.2002
Prevaccination level	–	–	<0.0001
BVDV2
Year–season	<0.0001	0.004	<0.0001
Dam age	<0.0001	<0.0001	0.0012
Sex	0.099	0.3292	0.1383
Birth weight	<0.0001	0.0136	–
Age(year–season)	<0.0001	<0.0001	<0.0001
Prevaccination level	–	–	<0.0001

¹Viral neutralization titers to bovine respiratory syncytial virus and bovine herpesvirus 1 were not measured in prevaccination samples; therefore, results are reported for only BVDV1 and BVDV2.

²“–” = variable not tested.