Table 1.
Characteristics of the patients included in the study
| Numbers (n) | Percent (%) | ||
|---|---|---|---|
| Age (years) | |||
| Mean ± SD (range) | 64.8 | ±9.8 (31-81) | |
| Gender | |||
| Male | 68 | 66.7 | |
| Female | 34 | 33.3 | |
| Cigarette smoking | |||
| Never smoked | 34 | 33.3 | |
| Ex-smoker | 20 | 19.6 | |
| Current smoker | 48 | 47.1 | |
| Pack-year/Mean ± SD (range) | 36.6 | ±36.8 (0-180) | |
| Tumor differentiation | |||
| Well | 16 | 15.7 | |
| Moderate | 53 | 52.0 | |
| Poor | 32 | 31.4 | |
| Unknown | 1 | ||
| Tumor stage | |||
| II | 31 | 30.4 | |
| III | 60 | 58.8 | |
| IV | 11 | 10.8 | |
| Operation method | |||
| Pneumonectomy | 1 | 1.0 | |
| Bilobectomy | 1 | 1.0 | |
| Lobectomy | 83 | 81.4 | |
| Segmentectomy | 9 | 8.8 | |
| Partial resection | 8 | 7.8 | |
| Complete resection | |||
| Yes | 77 | 75.5 | |
| No | 25 | 24.5 | |
| Preoperative chemotherapy | |||
| Yes | 9 | 8.8 | |
| No | 93 | 91.2 | |
| Postoperative chemotherapy | |||
| Yes | 74 | 72.5 | |
| No | 28 | 27.5 | |
| Radiotherapy to thorax (chest wall or mediastinum)a | |||
| Yes (Pre/Post) | 5 (1/4) | 4.9 | |
| No | 97 | 95.1 | |
| EGFR gene mutation status | |||
| Wild-type | 46 | 45.1 | |
| Mutation (+) | 33 | 32.4 | |
| Unknown | 23 | 22.5 | |
| Recurrenceb | |||
| Yes | 82 | 80.4 | |
| No | 20 | 19.6 | |
| Prognosis | |||
| Alive | 33 | 34.4 | |
| Dead | 63 | 65.6 | |
aNot including palliative radiotherapy.
bIncluding residual tumor after surgery.
SD: standard deviation.