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Table 5 Comparison of AUC for predicting PUC-Ta tumor recurrence between previous grading systems and our proposed grading system

From: Level of mitoses in non-muscle invasive papillary urothelial carcinomas (pTa and pT1) at initial bladder biopsy is a simple and powerful predictor of clinical outcome: a multi-center study in South Korea

Old_grades

AUC-Old_grades (se)

Proposed_grade

AUC-Proposed_grade

Old vs. new grade p-value

#1

0.686 (0.044)

1

0.709 (0.043)

0.3188

2

0.715 (0.043)

0.2784

3

0.703 (0.044)

0.4289

#2

0.688 (0.045)

1

0.709 (0.043)

0.3800

2

0.715 (0.043)

0.3215

3

0.703 (0.044)

0.5003

#3

0.685 (0.045)

1

0.709 (0.043)

0.2809

2

0.715 (0.043)

0.2516

3

0.703 (0.044)

0.3599

  1. #1:2004 WHO grading system (low grade/high grade); #2: 1973 WHO grading system (TCC grade 1,2, and 3); #3:Cheng et al. ‘s grading system [G1/G2/G3/G4-Anaplastic]