Table 1. Clinical characteristics of the patients according to age group.
| Characteristics | Younger group (n=482) | Older group (n=267) | P value |
|---|---|---|---|
| Gender | 0.801 | ||
| Male | 394 (81.7%) | 221 (82.8%) | |
| Female | 88 (18.3%) | 46 (17.2%) | |
| KPS | <0.001* | ||
| <80 | 8 (1.7%) | 33 (12.4%) | |
| ≥80 | 474 (98.3%) | 234 (87.6%) | |
| Smoking history | 0.711 | ||
| Non-smoker | 132 (27.4%) | 69 (25.8%) | |
| Smoker | 350 (72.6%) | 198 (74.2%) | |
| Pathology | <0.001* | ||
| SCC | 263 (54.6%) | 182 (68.2%) | |
| Non-SCC | 219 (45.4%) | 85 (31.8%) | |
| Clinical stage | 0.005* | ||
| IIIA | 179 (37.1%) | 128 (47.9%) | |
| IIIB | 303 (62.9%) | 139 (52.1%) | |
| Therapy | <0.001* | ||
| RT alone | 39 (8.1%) | 107 (40.1%) | |
| sCRT | 179 (37.1%) | 89 (33.3%) | |
| cCRT | 264 (54.8%) | 71 (26.6%) | |
| RT dose | 0.645 | ||
| Mean (SD) | 59.0 (5.01) | 58.8 (6.25) | |
| RT dose group | 0.552 | ||
| <60 Gy | 105 (21.8%) | 64 (24.0%) | |
| ≥60 Gy | 377 (78.2%) | 203 (76.0%) |
*, P<0.05. KPS, Karnofsky Performance Score; SCC, squamous cell sarcoma; RT, radiotherapy; sCRT, sequential chemoradiotherapy; cCRT, concurrent chemoradiotherapy.