Table 3 Concordance indexes of different staging systems for malignant IPMN
Stage system | The primary cohort (n = 1401) | The validation cohort (n = 600) |
|---|---|---|
AJCC 7th | 0.779 (0.755–0.803) | 0.759 (0.735–0.783) |
AJCC 8th | 0.777 (0.753–0.801) | 0.753 (0.729–0.777) |
AJCC modified | 0.779 (0.755–0.803) | 0.756 (0.732–0.78) |
Prognostic nomogram | 0.801 (0.787–0.815) | 0.791 (0.769–0.813) |