Table 3.

Generalized linear mixed model for quarter level bacteriological cure during the DP ¹.

Effect	Odds Ratio	SE 2	t-Value	p-Value	95% CI 3 for Odds Ratio
					Lower	Upper
Intercept	2.296	0.2992	2.778	0.006	1.277	4.128
pathogen category
S. aureus 4	4.711	0.4059	3.819	<0.001	2.126	10.442
NAS 5	1.589	0.2582	1.794	0.073	0.958	2.637
streptococci	9.229	0.5440	4.086	<0.001	3.176	26.814
Coliforms	3.527	0.3803	3.314	<0.001	1.673	7.433
other Gram-negative bacteria	2.339	0.5808	1.463	0.144	0.749	7.305
other Gram-positive bacteria	20.100	0.5583	5.375	<0.001	6.727	60.063
non-bacterial pathogens	2,490,297.566	1056.0896	0.014	0.989	0.000	0.000
mixed infections	Reference
season of DO 6
Winter	1.423	0.2123	1.663	0.097	0.939	2.158
Spring	0.696	0.1715	−2.116	0.034	0.497	0.974
Summer	0.911	0.1503	−0.617	0.537	0.679	1.224
Autumn	Reference
DCT 7
Non-AB 8	0.925	0.2872	−0.270	0.787	0.527	1.625
AB	Reference
Interaction of DCT and pathogen category
Non-AB DCT in combination with each pathogen category:
S. aureus	0.453	0.4795	−1.653	0.098	0.177	1.159
NAS	0.720	0.3187	−1.030	0.303	0.385	1.345
streptococci	0.140	0.6002	−3.274	0.001	0.043	0.455
Coliforms	1.932	0.5772	1.141	0.254	0.623	5.991
other Gram-negative bacteria	1,311,544.105	378.3516	0.037	0.970	0.000	0.000
other Gram-positive bacteria	0.126	0.5976	−3.468	<0.001	0.039	4.06
non-bacterial pathogens	1.009	1174.0970	0.000	1.000	0.000	0.000
corresponding AB group 9	Reference

¹ dry period; ² Standard error; ³ Confidence Interval; ⁴ Staphylococcus aureus; ⁵ non-aureus staphylococci; ⁶ dry off; ⁷ dry cow treatment; ⁸ antibiotic; ⁹ non-AB DCT was compared to AB DCT within each pathogen category, thus, the Reference to non-AB DCT for one pathogen category is the matching AB treatment group for the same pathogen category.