1. The ROC curves analyzing the sensitivity and specificity of rCBVmax values in astrocytomas for 1-year survival (A) and recurrence (B) show the optimal threshold value as ≤3.8 (sensitivity, 93.7% [95% confidence interval (CI), 69.7–99%]; specificity, 72.7% [...
The ROC curves analyzing the sensitivity and specificity of rCBVmax values in astrocytomas for 1-year survival (A) and recurrence (B) show the optimal threshold value as ≤3.8 (sensitivity, 93.7% [95% confidence interval (CI), 69.7–99%]; specificity, 72.7% [95% CI, 39.1–93.7%], P = .0002) for 1-year survival and as >4.2 (sensitivity, 77.8% [95% CI, 40–96.5%]; specificity, 94.4% [72.6–99.1%], P = .0001) for recurrence. C, Kaplan-Meier curve of PFS probability (hazard ratio [HR] = 0.09, P = .0007). The thresholdmax represents the rCBVmax cutoff value, in which 1 corresponds to rCBVmax ≤4.2.
S. Bisdas et al. AJNR Am J Neuroradiol 2009;30:
©2009 by American Society of Neuroradiology