Table 5.

Final mixed logistic regression model results for the outcome variable no recurrence 60 d.

Variable	Coefficient		OR	95% CI	P-valuea
	X	SE
Intercept	1.759	1.323	2.461	0.721–8.399	0.149
Treatment
AB	−0.475	0.804	0.932	0.372–2.338	0.881
NSAID (reference)	0
Lactation number of the cow at the day of clinical mastitis occurrence
1	1.843	0.809	2.939	0.883–9.790	0.079
2	2.137	0.791	3.346	1.126–9.947	0.030
>2 (reference)	0
Days in milk at the day of clinical mastitis occurrence
0–100	−2.815	1.050	0.207	0.059–0.721	0.014
101–200	−1.939	0.941	0.734	0.291–1.854	0.510
>200 (reference)	0
Pathogen cultured from the pre-treatment milk sample
Mix	−1.002	1.744	0.273	0.041–1.838	0.180
Other	0.628	0.980	4.628	0.873–24.542	0.072
Staphylococci	−2.028	1.008	0.184	0.044–0.780	0.022
Streptococci	−0.510	0.884	0.246	0.065–0.926	0.038
Enterobacteriaceae	−1.888	1.767	1.410	0.387–5.135	0.600
Contaminated			0.649	0.179–2.344	0.506
No growth (reference)	0

^aSignificance set at P < 0.05. Bold value indicates significant value.

Two different treatment regimens were investigated: NSAID, solely ketoprofen comprising three treatments at an interval of 24 h; AB, antibiotic treatment as usual on the farm according to the label of the respective product.