Fig. 3.

Twenty-five cases of canine TCC were divided into two groups, depending on the EGFR protein expression score obtained through immunohistochemistry: low- (scores 0, 1 and 2, n=7) and high- (scores 3, n=18) expression groups. Survival times were compared between the low- and high-expression groups using Kaplan-Meier’s survival curves. Significant correlation was not observed between survival times and EGFR expression levels in TCC (P=0.82) with a hazard ratio of 1.12 (95% confidence interval, 0.41–3.05) as a result of statistical analysis by the Cox regression model.