Demographics of Patients with NENs (n = 495)
| Demographic | Data |
| Sex | |
| Male | 299 (60.4) |
| Female | 196 (39.6) |
| Age (y) | |
| Median | 59.0 ± 10.7 |
| y ≤50 | 111 (22.4) |
| 50< y ≤60 | 146 (29.5) |
| 60< y ≤70 | 165 (33.3) |
| 70< y ≤80 | 73 (14.7) |
| Primary tumor site | |
| Cancer of unknown primary | 49 (9.9) |
| Lung | 38 (7.7) |
| Midgut | 139 (28.1) |
| Others | 42 (8.5) |
| Pancreas | 199 (40.2) |
| Rectum | 20 (4.0) |
| Stomach | 8 (1.6) |
| Ki-67 index grading | |
| G1 (Ki-67 < 3%) | 117 (23.6) |
| G2 (Ki-67 = 3%–20%) | 245 (49.5) |
| G3 (Ki-67 > 20%) | 29 (5.9) |
| Not assessed | 104 (21.0) |
Qualitative data are numbers followed by percentages in parentheses; continuous data are medians.