Table 2: Categories of COX-2 immunostaining in UCB and normal urothelium.

Primary tumor ()Normal urothelium () value

Low immunostaining102 (82.9%)25 (100%)0.033
High immunostaining21 (17.1%)0 (0%)
value<0.001<0.001‚ÄČ

One sample of the nonparametric chi-squared test; Mann-Whitney test.