Table 2.
Patients’ characteristics among the groups studied
| Characteristics | Group I | Group II | Group III | Group IV |
| Patients (all), n (%) | 32 (4.1) | 97 (12.4) | 630 (80.5) | 24 (3.1) |
| Average interval from GIST diagnosis (years) | 4.7 | 1.4 | – | 7.0 |
| Gender, n (%) | ||||
| Men | 21 (65.6) | 55 (56.7) | 353 (56.0) | 15 (62.5) |
| Women | 11 (34.40) | 42 (43.3) | 277 (44.0) | 9 (37.5) |
| Age at diagnosis of GIST (years) | ||||
| Mean | 62.5 | 62.2 | 54.1 | 67.4 |
| Range | 39–82 | 17–91 | 25–86 | 48–85 |
| Race, n (%) | ||||
| White | 26 (81.3) | 74 (76.30) | 481 (76.4) | 22 (91.7) |
| Black | 1 (3.1) | 8 (8.3) | 64 (10.2) | 1 (4.2) |
| Hispanic | 3 (9.4) | 12 (12.4) | 57 (9.1) | 1 (4.2) |
| Others | 2 (6.3) | 3 (3.1) | 28 (4.4) | – |
| Treated with imatinib, n (%) | ||||
| Yes | 16 (50.0) | 29 (29.9) | 288 (45.7) | 7 (29.2) |
| No | 16 (50.0) | 68 (70.1) | 342 (54.3) | 17 (70.8) |
| Vital status, n (%) | ||||
| Alive | 23 (71.9) | 64 (66.0) | 423 (67.1) | 14 (58.3) |
| Dead | 9 (28.1) | 33 (34.0) | 207 (32.90 | 10 (41.7) |
| GIST site, n (%) | ||||
| Stomach | 18 (56.3) | 50 (51.6) | 305 (48.4) | 13 (54.2) |
| Small intestine | 10 (31.3) | 31 (32.0) | 224 (35.6) | 8 (33.3) |
| Retroperitoneal space | 1 (3.1) | 11 (11.3) | 42 (6.7) | 2 (8.3) |
| Colorectal | 3 (9.4) | 5 (5.1) | 41 (6.5) | 1 (4.2) |
| Omentum/mesentery | – | – | 18 (2.9) | – |
| GIST size in cm, n (%) | ||||
| <5 | 8 (25.0) | 48 (49.50 | 129 (20.5) | 15 (62.5) |
| 5–10 | 10 (31.3) | 15 (15.5) | 178 (28.3) | 3 (12.5) |
| >10 | 3 (9.4) | 15 (15.5) | 176 (28.0) | 2 (8.3) |
| Unknown | 11 (34.4) | 19 (19.6) | 147 (23.3) | 4 (16.7) |
| No. of other primaries | 32 | 97 | – | 56 |
| Synchronous | 19 | 48 | – | 30 |
| Metachronous | 13 | 49 | – | 26 |
GIST, gastrointestinal stromal tumor.