Table 1 Baseline characteristics of the pNEN patients
n (%) | Total | Training group | Validation group | P value |
|---|---|---|---|---|
(n = 2960) | (n = 1974) | (n = 986) | ||
Age | 0.105 | |||
< 65 | 1909 (64.5) | 1293 (65.5) | 616 (62.5) | |
≥ 65 | 1051 (35.5) | 681 (34.5) | 370 (37.5) | |
Sex | 0.056 | |||
Male | 1626 (54.9) | 1060 (53.7) | 566 (57.4) | |
Female | 1334 (45.1) | 914 (46.3) | 420 (42.6) | |
Race | 0.282 | |||
White | 2268 (76.6) | 1511 (76.5) | 757 (76.8) | |
Black | 347 (11.7) | 242 (12.3) | 105 (10.6) | |
Other | 345 (11.7) | 221 (11.2) | 124 (12.6) | |
Primary site | 0.063 | |||
Head | 867 (29.3) | 614 (31.1) | 263 (26.7) | |
Body | 466 (15.7) | 302 (15.3) | 164 (16.6) | |
Tail | 1058 (35.7) | 695 (35.2) | 353 (35.8) | |
Other | 569 (19.2) | 363 (18.4) | 206 (20.9) | |
Grade | 0.540 | |||
G1 | 2068 (69.9) | 1386 (70.2) | 682 (69.2) | |
G2 | 577 (19.5) | 374 (18.9) | 203 (20.6) | |
G3 | 315 (10.6) | 214 (10.8) | 101 (10.2) | |
Marital status | 0.643 | |||
Married | 1814 (61.3) | 1209 (61.2) | 605 (61.4) | |
Unmarried | 513 (17.3) | 335 (17.0) | 178 (18.1) | |
Other | 633 (21.4) | 430 (21.8) | 203 (20.6) | |
T stage | 0.889 | |||
T1 | 893 (30.2) | 591 (29.9) | 302 (30.6) | |
T2 | 948 (32.0) | 635 (32.2) | 313 (31.7) | |
T3 | 780 (26.4) | 526 (26.6) | 254 (25.8) | |
T4 | 147 (5.0) | 93 (4.7) | 54 (5.5) | |
Unspecific | 192 (6.5) | 129 (6.5) | 63 (6.4) | |
N stage | 0.245 | |||
N0 | 2069 (69.9) | 1364 (69.1) | 705 (71.5) | |
N1 | 773 (26.1) | 534 (27.1) | 239 (24.2) | |
Unspecific | 118 (4.0) | 76 (3.9) | 42 (4.3) | |
Tumor size | 0.825 | |||
< 2 | 880 (29.7) | 592 (30.0) | 288 (29.2) | |
2–4 | 958 (32.4) | 636 (32.2) | 322 (32.7) | |
≥ 4 | 965 (32.6) | 637 (32.3) | 328 (33.3) | |
Unspecific | 157 (5.3) | 109 (5.5) | 48 (4.9) | |
Other site metastasis | 0.949 | |||
Yes | 109 (3.7) | 73 (3.7) | 36 (3.7) | |
No | 2851 (96.3) | 1901 (96.3) | 950 (96.3) | |
Functional status | 0.800 | |||
Functional | 223 (7.5) | 147 (7.4) | 76 (7.7) | |
Nonfunctional | 2737 (92.5) | 1827 (92.6) | 910 (92.3) | |
Liver metastasis | 0.422 | |||
Yes | 641 (21.7) | 419 (21.2) | 222 (22.5) | |
No | 2319 (78.3) | 1555 (78.8) | 764 (77.5) |