Table 4.

The OR and p values from the multivariable binary logistic regression for associations with the requirement for an additional treatments for BRD

Variable	B (se)	OR (95% CI)	P value
Experimental group 1	1.13 (0.65)	3.10 (0.86 to 11.14)	0.083
Experimental group 2	0.49 (0.63)	1.63 (0.48 to 5.54)	0.44
Age at BRD onset	−0.057 (0.025)	0.95 (0.90 to 0.99)	0.026

The experimental groups were group 1 (NSAID), group 2 (antimicrobial), group 3 (both). Experimental group 3 was used as the reference group.

BRD, bovine respiratory disease; NSAID, non-steroidal anti-inflammatory drug.