训练集，N = 3324

测试集，N = 1425

性别

女

1034 (31.1%)

443 (31.1%)

男

2290 (68.9%)

982 (68.9%)

年龄

≤40

48 (1.4%)

21 (1.5%)

41~49

112 (3.4%)

41 (2.9%)

50~59

428 (12.9%)

195 (13.7%)

60~69

867 (26.1%)

358 (25.1%)

70~79

1011 (30.4%)

449 (31.5%)

≥80

858 (25.8%)

361 (25.3%)

种族

白种人

2381 (71.6%)

1000 (70.2%)

黑种人

378 (11.4%)

179 (12.6%)

黄种人

539 (16.2%)

233 (16.4%)

其他

26 (0.8%)

13 (0.9%)

肿瘤位置

胃底区

1713 (51.5%)

726 (50.9%)

胃体区

832 (25.0%)

367 (25.8%)

幽门区

779 (23.4%)

332 (23.3%)

肿瘤大小

32 ± 22

31 ± 22

分化程度

未分化

398 (12.0%)

173 (12.1%)

低分化

1477 (44.4%)

616 (43.2%)

中分化

1400 (42.1%)

624 (43.8%)

高分化

49 (1.5%)

12 (0.8%)

T分期

Tis

833 (25.1%)

351 (24.6%)

T₁

2491 (74.9%)

1074 (75.4%)

远处转移

M₀

2630 (79.1%)

1148 (80.6%)

M₁

694 (20.9%)

277 (19.4%)

原发部位手术

否

1782 (53.6%)

717 (50.3%)

是

1542 (46.4%)

708 (49.7%)

淋巴结捡取数目

<20

2285 (68.7%)

967 (67.9%)

≥20

1039 (31.3%)

458 (32.1%)

原发肿瘤数目

1个

2355 (70.8%)

1007 (70.7%)

>1个

969 (29.2%)

418 (29.3%)

婚姻状况

已婚

2026 (61.0%)

874 (61.3%)

单身

695 (20.9%)

306 (21.5%)

离异

603 (18.1%)

245 (17.2%)