From: Clinical validation of the gastrointestinal NET grading system: Ki67 index criteria of the WHO 2010 classification is appropriate to predict metastasis or recurrence
Metastases or recurrences
+ (Group A, n = 7)
- (Group B, n = 38)
p value
Ki67 index ≦2.8%
4
33
Ki67 index >2.8%
3
5
0.09