Table 1.
Patient characteristics.
| Variables | All patients (N=875) | Patients with QoL questionnaires (N=99) | *p value |
|---|---|---|---|
| Mean age at diagnosis, years (± SD) | 50.3 (± 12.6) | 47.5( ± 11.4) | &0.03 |
| Gender | #0.97 | ||
| Male | 688 (78.6%) | 78 (78.8%) | |
| Female | 187 (21.4%) | 21 (21.2%) | |
| AJCC stage, 7th ed. | #0.12 | ||
| I | 79 (9.0%) | 14 (14.1%) | |
| II | 182(20.8%) | 17 (17.2%) | |
| III | 277 (31.7%) | 38 (38.4%) | |
| IV | 337 (38.5%) | 30 (30.3%) | |
| T stage | #<0.01 | ||
| T1 | 378 (43.2%) | 42 (42.4%) | |
| T2 | 85 (9.7%) | 23 (23.2%) | |
| T3 | 191 (21.8%) | 19 (19.2%) | |
| T4 | 221 (25.3%) | 15 (15.2%) | |
| N stage | #0.11 | ||
| N0 | 137 (15.6%) | 18 (18.2%) | |
| N1 | 320 (36.6%) | 26 (26.3%) | |
| N2 | 258 (29.5%) | 39 (39.4%) | |
| N3 | 160 (18.3%) | 16 (16.1%) | |
| Histology | $0.50 | ||
| WHO type 1 | 17 (1.9%) | 2 (2.0%) | |
| WHO type 2 | 156 (17.8%) | 13 (13.1%) | |
| WHO type 3 | 702 (80.2%) | 84 (84.9%) | |
| Combination with chemotherapy | #0.40 | ||
| No | 83 (9.5%) | 14 (14.1%) | |
| Yes | 792 (90.5%) | 85 (85.9%) |
&Independent sample t tests; #Chi-square test; $Fisher’s exact test.
QoL, quality of life; SD, standard deviation; RT, radiotherapy; AJCC, The American Joint Committee on Cancer; WHO, World Health Organization.