Fig. 6. Kaplan–Meier recurrence-free survival (RFS) curve for Model 2 in lymph node-negative patients.
Group description (number of patients related to this characteristic is in the bracket): Group 1: other combinations not included in Group 2; Group 2: tumour-free distance ≤3.5**, adenosquamous tumour type. One patient without event is not included into the groups: Minimal tu-pcf (US) > 3.5**, adenosquamous tumour type. *Log-rank test. **Cut-off determined by ROC analysis, the criterion was the highest value of the sum of sensitivity and specificity.