Table 1 Characteristics of the gastric GIST patients before and after propensity score matching
Characteristic | Before matching | After matching | |||||
|---|---|---|---|---|---|---|---|
Total, n (%) | Male, n = 512 (%) | Female, n = 538 (%) | P value | Male, n = 448 (%) | Female, n = 448 (%) | P value | |
Age (years) | 1050 | 64.6 ± 13.0 | 63.6 ± 14.0 | 0.230 | 64.7 ± 13.0 | 64.3 ± 13.3 | 0.671 |
Race | 0.858 | 0.501 | |||||
Others | 139 (13.2) | 65 (12.7) | 74 (13.8) | 56 (12.5) | 68 (15.2) | ||
White | 651 (62.0) | 321 (62.7) | 330 (61.4) | 285 (63.6) | 274 (61.1) | ||
Black | 260 (24.8) | 126 (24.6) | 134 (13.8) | 107 (23.9) | 106 (23.7) | ||
Marital status | < 0.001 | 0.070 | |||||
Married | 594 (56.6) | 321 (62.7) | 273 (50.7) | 279 (62.3) | 239 (53.3) | ||
Unmarried | 456 (43.4) | 191 (37.3) | 265 (49.3) | 169 (37.7) | 209 (46.7) | ||
Grade | 0.291 | 0.929 | |||||
Well differentiated | 531 (50.6) | 247 (48.2) | 284 (52.8) | 230 (51.3) | 222 (49.6) | ||
Moderately differentiated | 315 (30.0) | 154 (30.1) | 161 (29.9) | 137 (30.6) | 140 (31.2) | ||
Poorly differentiated | 90 (8.6) | 48 (9.4) | 42 (7.8) | 39 (8.7) | 39 (8.7) | ||
Undifferentiated | 114 (10.8) | 63 (12.3) | 51 (9.5) | 42 (9.4) | 47 (10.5) | ||
Surgical treatment | 0.032 | 1.000 | |||||
No surgery | 31 (3.0) | 21 (4.1) | 10 (1.9) | 8 (1.8) | 8 (2.0) | ||
Underwent surgery | 1019 (97.0) | 491 (95.9) | 528 (98.1) | 440 (98.2) | 440 (98.0) | ||
Tumor size | 0.001 | 0.145 | |||||
≤ 2 cm | 174 (16.6) | 68 (13.3) | 106 (19.7) | 67 (15.0) | 85 (19.0) | ||
2.1–5.0 cm | 410 (39.0) | 190 (37.1) | 220 (40.9) | 181 (40.4) | 185 (41.3) | ||
5.1–10 cm | 255 (24.3) | 131 (25.6) | 124 (23.0) | 121 (27.0) | 95 (21.2) | ||
> 10 cm | 211 (20.1) | 123 (24.0) | 88 (16.4) | 79 (17.6) | 83 (18.5) | ||
Mitotic index/50 HPF | 0.044 | 0.194 | |||||
≤ 5 | 840 (80.0) | 394 (77.0) | 446 (82.9) | 348 (77.7) | 368 (82.2) | ||
6–10 | 86 (8.2) | 46 (8.9) | 40 (7.4) | 44 (9.8) | 31 (6.9) | ||
> 10 | 124 (11.8) | 72 (14.1) | 52 (9.7) | 56 (12.5) | 49 (10.9) | ||