Table 3:

Diagnostic accuracy of rTT as the seventh edition T-category modifier

VariableNo Shrinkage FactorWith Shrinkage Factor 0.8
rTT identifying 7th edition T1 tumor with pTT > 0.5 cm
    Total case No.119119
    True positive3834
    True negative5965
    False positive1711
    False negative59
    Sensitivity88% (75–96)79% (64–90)
    Specificity78% (67–86)86% (76–93)
    Positive predictive value69% (55–81)76% (60–87)
    Negative predictive value92% (83–97)88% (78–94)
    Accuracy82%83%
rTT identifying 7th edition T2 tumor with pTT > 1.0 cm
    Total case No.161161
    True positive6454
    True negative4965
    False positive3115
    False negative1727
    Sensitivity79% (69–87)67% (55–77)
    Specificity61% (50–72)81% (71–89)
    Positive predictive value67% (57–77)78% (67–87)
    Negative predictive value74% (62–84)71% (60–80)
    Accuracy70%74%