Table 1 Baseline characteristics of patients
Characteristics | SEER cohort (%) | P | ||
|---|---|---|---|---|
Entire cohort n = 3797 | Training n = 2849 | Testing n = 948 | ||
Age | 62.25 ± 13.67 | 62.12 ± 13.90 | 62.38 ± 13.43 | 0.616 |
Sex | 0.962 | |||
Male | 1908(50.2) | 1431(50.2) | 477(47.1) | |
Female | 1889(49.8) | 1418(49.8) | 471(52.9) | |
Marriage | 0.158 | |||
Married | 2143(56.4) | 1609(56.4) | 534(56.3) | |
Unmarried | 1447(38.1) | 1096(38.4) | 351(37.0) | |
Unknown | 207(5.5) | 144(5.2) | 6.6(6.7) | |
Race | 0.359 | |||
White | 2534(66.7) | 1909(67.0) | 625(65.9) | |
Black | 684(18.0) | 519(18.2) | 165(17.4) | |
Others | 579(15.3) | 421(14.8) | 158(16.7) | |
Tumor location | 0.716 | |||
Stomach | 1509(39.7) | 1119(39.2) | 390(41.1) | |
Duodenum | 213(5.6) | 158(5.5) | 55(5.8) | |
Jejunum | 272(7.1) | 208(7.3) | 64(6.7) | |
Ileum | 104(2.7) | 86(3.0) | 18(1.8) | |
Colon | 79(2.0) | 60(2.1) | 19(2.0) | |
Rectum | 104(2.7) | 79(2.7) | 25(2.6) | |
Others | 457(12.0) | 340(11.9) | 117(12.3) | |
Unknown | 1059(28.2) | 799(28.3) | 260(27.7) | |
Tumor size | 0.003 | |||
≤ 2 cm | 446(11.7) | 356(12.4) | 90(9.4) | |
2–5 cm | 1066(28.0) | 797(27.9) | 269(28.3) | |
5–10 cm | 1088(28.6) | 839(29.4) | 249(26.2) | |
> 10 cm | 896(23.5) | 645(22.6) | 251(26.4) | |
Unknown | 301(8.2) | 212(7.7) | 89(9.7) | |
N stage | 0.319 | |||
N0 | 3531(93.1) | 2658(93.4) | 873(92.2) | |
N1 | 131(3.4) | 97(3.4) | 34(3.5) | |
Unknown | 135(3.5) | 94(3.2) | 41(4.3) | |
Mitotic rate | 0.794 | |||
< 5/50 HPFs | 1835(48.3) | 1386(48.6) | 449(47.3) | |
≥ 5/50 HPFs | 814(21.4) | 610(21.4) | 204(21.5) | |
Unknown | 1148(30.3) | 853(30.0) | 295(31.2) | |
Liver metastasis | 0.823 | |||
No | 3368(88.7) | 2529(88.7) | 839(88.5) | |
Yes | 429(11.3) | 320(11.3) | 109(11.5) | |