TABLE 3.

Significant factors associated with CM outcome^a

Parameterb	Estimate (SE)c	Wald chi-square test	Pr > t valued
Intercept	2.79 (1.27)	4.78	0.0287
J5 Vacc	3.00 (1.27)	5.54	0.0186
DIM	−0.05 (0.02)	7.41	0.0065
DIM*J5 Vacc	−0.04 (0.02)	4.77	0.0289

^aData are a logistic regression model of significant factors associated with whether CM had a mild (>100% of premastitic daily milk production for 21 days following CM) or severe (<85% of premastitic daily milk production for 21 days following CM or culled or died at <30 days after onset of CM and <150 DIM) outcome. Quantitative effects of significant variables on mild CM outcome.

^bJ5 Vacc, effect of being vaccinated with J5; DIM, effect of each 1-day increase in days in milk at onset of CM; DIM*J5 Vacc, likelihood of mild outcome for J5 vaccinates for each 1-day increase in DIM at onset of CM. Overall logistic regression model of 85.7% concordant pairs, with P < 0.0001, likelihood ratio.

^cPositive estimates mean a mild outcome is more likely as this factor increases; negative estimates mean a severe outcome is more likely as this factor increases.

^dChi-square test P value.