Comparisons of Novel Risk Stratification Models to the Current cT1a/b Staging in Incidental Prostate Cancer.

Of all tested stratification models, the consideration of GS stratified between < 8 and ≥ 8 resulted in the best survival discrimination, as well as highest accuracy after cross-validation. In consequence, the use of this model (GS < 8 vs.

≥ 8) appears better suited than the standard cT1a vs. cT1b substaging, when cancer-specific survival represents the endpoint of interest.