TABLE 1.
Demographic and clinical characteristics of the patients
| Characteristics | Patients, n (%) | P‐value | |
|---|---|---|---|
| Non–recurrence (n = 16) | Recurrence (n = 26) | ||
| Age (mean, 95% confidence interval) | 56.3 (50.9‐61.8) | 57.2 (51.4‐63.0) | 0.833 |
| Gender | |||
| Male | 8 (50%) | 12 | 0.814 |
| Female | 8 (50%) | 14 | |
| Histological type | |||
| Squamous | 14 | 23 | 0.928 |
| Other types | 2 | 3 | |
| Masaoka‐Koga surgical Stage | |||
| I | 1 | 0 | 0.006 |
| II | 7 | 2 | |
| III | 7 | 22 | |
| IV | 1 | 2 | |
| Preoperative therapy | |||
| None | 15 | 23 | 0.474 |
| Chemotherapy | 1 | 2 | |
| Radiation | 0 | 1 | |
| Treatment after operation | |||
| None | 6 | 19 | 0.093 |
| Chemotherapy | 0 | 0 | |
| Radiation | 9 | 6 | |
| Chemoradiation | 0 | 1 | |
| Treatment after recurrence | |||
| None | NA | 7 | |
| Surgery | NA | 2 | |
| Chemotherapy | NA | 6 | |
| Radiation | NA | 9 | |
| Chemoradiation | NA | 2 | |
Abbreviation: NA, not applicable.