Table 1 The descriptive characteristics of stage IB GAC patients before PSM
Characteristics | Before PSM | P value | ||
|---|---|---|---|---|
All | No Chemo | Chemo | ||
1727 | 1117 | 610 | ||
Age | 68.7 (12.3) | 72.1 (11.4) | 62.4 (11.2) | <0.001 |
Year | <0.001 | |||
2004–2007 | 634 (36.7%) | 446 (39.9%) | 188 (30.8%) | |
2008–2011 | 553 (32.0%) | 373 (33.4%) | 180 (29.5%) | |
2012–2015 | 540 (31.3%) | 298 (26.7%) | 242 (39.7%) | |
Gender | 0.006 | |||
Female | 631 (36.5%) | 435 (38.9%) | 196 (32.1%) | |
Male | 1096 (63.5%) | 682 (61.1%) | 414 (67.9%) | |
Race | 0.202 | |||
White | 1128 (65.3%) | 717 (64.2%) | 411 (67.4%) | |
Non-White | 599 (34.7%) | 400 (35.8%) | 199 (32.6%) | |
Marital status | 0.011 | |||
Married | 1098 (63.6%) | 685 (61.3%) | 413 (67.7%) | |
Unmarried | 629 (36.4%) | 432 (38.7%) | 197 (32.3%) | |
Grade | 0.001 | |||
I/II | 782 (45.3%) | 540 (48.3%) | 242 (39.7%) | |
III/IV | 945 (54.7%) | 577 (51.7%) | 368 (60.3%) | |
T stage | <0.001 | |||
T1 | 503 (29.1%) | 231 (20.7%) | 272 (44.6%) | |
T2a | 1224 (70.9%) | 886 (79.3%) | 338 (55.4%) | |
Primary site | <0.001 | |||
Cardia/fundus | 534 (30.9%) | 291 (26.1%) | 243 (39.8%) | |
Greater curvature/lesser curvature/body | 456 (26.4%) | 297 (26.6%) | 159 (26.1%) | |
Others | 178 (10.3%) | 125 (11.2%) | 53 (8.7%) | |
Pylorus/antrum | 559 (32.4%) | 404 (36.2%) | 155 (25.4%) | |
Tumor size | 0.054 | |||
≤2cm | 532 (30.8%) | 322 (28.8%) | 210 (34.4%) | |
≤5cm | 902 (52.2%) | 599 (53.6%) | 303 (49.7%) | |
>5cm | 293 (17.0%) | 196 (17.5%) | 97 (15.9%) | |
RNE | 0.011 | |||
16 | 696 (40.3%) | 425 (38.0%) | 271 (44.4%) | |
1–15 | 1031 (59.7%) | 692 (62.0%) | 339 (55.6%) | |
RNP | <0.001 | |||
0 | 1247 (72.2%) | 890 (79.7%) | 357 (58.5%) | |
1 | 329 (19.1%) | 173 (15.5%) | 156 (25.6%) | |
2 | 151 (8.7%) | 54 (4.8%) | 97 (15.9%) | |
Radiation | <0.001 | |||
None | 1304 (75.5%) | 1084 (97.0%) | 220 (36.1%) | |
Yes | 423 (24.5%) | 33 (3.0%) | 390 (63.9%) | |