Fig. 2.
Kaplan–Meier plots of survival analysis. Patients were classified according to their median (a is SUVmax, b is SUVmin, and c is TBR) and according to the optimal cutoff (d is SUVmax, e is SUVmin, and f is TBR) values as described in the methods section. The log-rank test demonstrated a statistically significant worse prognosis in patients with TBR greater than 5 (median value, p = 0.019, curve c) and 4.8 (optimal cutoff, p = 0.018, curve f). Using the optimal cutoff for all the parameters improved the capacity of differentiating between patients with better and worse prognosis; however, SUVmax (a and d) and SUVmin (b and e) were not statistically significant