Table 1. Clinical characteristics of patients according to radiotherapy.
| Characteristic | All patients | The CR patients after CT | ||||
|---|---|---|---|---|---|---|
| RT group(n=121) | No-RT group(n=22) | P | RT group(n=71) | No-RT group(n=13) | P | |
| age | 0.001 | 0.001 | ||||
| >60 | 15(12.3%) | 10(45.5%) | 8(11.3%) | 7(53.8%) | ||
| ≤60 | 106(87.7%) | 12(54.5%) | 63(88.7%) | 6(46.2%) | ||
| gender | 0.883 | 0.472 | ||||
| male | 75(62%) | 14(63.6%) | 44(62%) | 10(76.9%) | ||
| female | 46(38%) | 8(36.4%) | 27(38%) | 3(23.1%) | ||
| Primary site | 0.836 | 0.453 | ||||
| nasal cavity | 91(75.2%) | 17(77.3%) | 56(78.9%) | 12(92.3%) | ||
| Waldeyer's ring | 30(24.8%) | 5(22.7%) | 15(21.1%) | 1(7.7%) | ||
| B symptom | 0.694 | 1.000 | ||||
| present | 55(45.5%) | 11(50%) | 35(47.3%) | 6(46.2%) | ||
| absent | 66(54.5%) | 11(50%) | 36(50.7%) | 7(53.8%) | ||
| Local invasion | 0.941 | 0.472 | ||||
| yes | 78(64.5%) | 14(63.6%) | 36(50.7%) | 8(61.5%) | ||
| no | 43(35.5%) | 8(36.4%) | 35(47.3%) | 5(38.5%) | ||
| Ann Arbor stage | 0.250 | 0.650 | ||||
| I | 71(58.7%) | 10(45.5%) | 43(60.6%) | 7(53.8%) | ||
| II | 50(41.3%) | 12(54.5%) | 28(39.4%) | 6(46.2%) | ||
| LDH level | 0.827 | 0.751 | ||||
| normal | 96(79.3%) | 17(77.3%) | 54(76.1%) | 11(84.6%) | ||
| elevated | 25(20.7%) | 5(22.7%) | 17(23.9%) | 2(15.4%) | ||
| ECOG score | 0.045 | 0.329 | ||||
| 0~1 | 106(87.6%) | 15(68.2%) | 61(85.9%) | 13(100%) | ||
| 2 | 15(12.4%) | 7(31.8%) | 10(14.1%) | 0(0%) | ||
| mIPI | 0.114 | 0.060 | ||||
| 0~1 | 67(55.4%) | 10(45.5%) | 41(57.7%) | 5(38.5%) | ||
| 2 | 42(34.7%) | 5(22.7%) | 22(33.8%) | 3(23.1%) | ||
| 3 | 10(8.3%) | 5(22.7%) | 5(7.1%) | 2(15.3%) | ||
| 4~5 | 2(1.6%) | 2(9.1%) | 3(1.4%) | 3(23.1%) | ||
Abbreviations: LDH, lactate dehydrogenase; ECOG, Eastern Cooperative Oncology Group; mIPI, stage-modified International Prognostic Index.