Table 1. Patient characteristics.
| Total | Surgery | RT | Surgery+RT | No surgery/No RT | ||
|---|---|---|---|---|---|---|
| Variable | n = 10354 | n = 2708(%) | n = 1355(%) | n = 777(%) | n = 5514(%) | P value |
| Sex | <0.001 | |||||
| Male | 6658 | 1628(60.1) | 1016(75.0) | 531(68.3) | 3483(63.2) | |
| Female | 3696 | 1080(39.9) | 339(25.0) | 246(31.7) | 2031(36.8) | |
| Age(year) | <0.001 | |||||
| <75 | 7466 | 1858(68.6) | 1032(76.2) | 670(86.2) | 3906(70.8) | |
| ≥75 | 2888 | 850(31.4) | 323(23.8) | 107(13.8) | 1608(29.2) | |
| Race | <0.001 | |||||
| White | 7372 | 1822(67.3) | 1057(78.0) | 531(68.3) | 3962(71.9) | |
| Black | 1460 | 380(14.0) | 148(10.9) | 99(12.7) | 833(15.1) | |
| Other | 1522 | 506(18.7) | 150(11.1) | 147(18.9) | 719(13.0) | |
| Pathological grading | <0.001 | |||||
| Grade I | 188 | 37(1.4) | 36(2.7) | 13(1.7) | 102(1.8) | |
| Grade II | 2013 | 498(18.4) | 343(25.3) | 125(16.1) | 1047(19.0) | |
| Grade III | 6393 | 1972(72.8) | 719(53.1) | 562(72.3) | 3140(56.9) | |
| Grade IV | 197 | 80(3.0) | 23(1.7) | 31(4.0) | 63(1.1) | |
| Unknown | 1563 | 121(4.5) | 234(17.3) | 46(5.9) | 1162(21.1) | |
| Stage of T/Na | <0.001 | |||||
| Stage I | 2834 | 132(4.9) | 434(32.0) | 30(3.9) | 2238(40.6) | |
| Stage II | 2031 | 463(17.1) | 365(26.9) | 117(15.1) | 1086(19.7) | |
| Stage III | 5489 | 2113(78.0) | 556(41.0) | 630(81.1) | 2190(39.7) | |
| Histological type | <0.001 | |||||
| Adenocarcinoma | 7326 | 1768(65.3) | 1107(81.7) | 505(65.0) | 3946(71.6) | |
| Signet ring cell | 252 | 96(3.5) | 24(1.8) | 28(3.6) | 104(1.9) | |
| Mucinous | 2776 | 844(31.2) | 224(16.5) | 244(31.4) | 1464(26.6) |
RT, radiation.
a Stage of T/N: Stage I include T1N0-1, T2N0; Stage II include T1N2-3, T2N1-2, T3N0-1, T4aN0; Stage III include T2N3, T3N2-3, T4aN1-3, T4bN0-3.