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Table 3 Concordance indexes of different staging systems for malignant IPMN

From: A novel staging system and clinical predictive nomogram for more accurate staging and prognosis of malignant pancreatic intraductal papillary mucinous neoplasms: a population-based study

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)