Prognostic Factors for Cancer-Specific Survival and Disease-Free Interval of Dogs with Mammary Carcinomas

Table 5

Analysis of maximum likelihood estimates of multivariate logistic regression to predict the probability of overall survival and disease-free interval for at least 1 year after surgery in dogs affected by mammary tumor.

Parameter	Estimate	Standard error
Cancer-specific survival
Intercept	3.6329	1.0338
Grade (1)	0.9109	0.4777
Grade (2)	0.2941	0.4453
Grade (3)	—	—
Age	−0.2307	0.0947
c (area under ROC curve) = 0.816
Disease-free interval
Intercept	3.8524	1.0272
Grade (1)	0.4808	0.3946
Grade (2)	0.5794	0.4269
Grade (3)	—	—
Age	−0.2811	0.0956
c (area under ROC curve) = 0.823