Demographic characteristics of the study sample (n = 256)
| Characteristic | No. (and %) of study subjects |
|---|---|
| Male sex | 155 (60.5) |
| Presenting symptom | |
| Cough | 38 (14.8) |
| Hemoptysis | 34 (13.3) |
| Pain | 21 (8.2) |
| Pneumonia | 5 (2.0) |
| Dyspnea | 6 (2.3) |
| Incidental lesion found on chest radiograph | 113 (44.1) |
| Unknown | 39 (15.3) |
| Procedure | |
| Biopsy | 4 (1.6) |
| Lobectomy | 175 (68.4) |
| Pneumonectomy | 40 (15.6) |
| Wedge resection | 37 (14.5) |
| Tumour pathology | |
| Adenocarcinoma | 88 (34.4) |
| Squamous cell | 79 (30.9) |
| Broncheoalveolar | 37 (14.5) |
| Clear cell | 3 (1.2) |
| Large cell | 38 (14.8) |
| Mixed | 10 (3.9) |
| Poorly differentiated | 1 (0.4) |
| TNM surgical stage | |
| IA | 69 (27.0) |
| IB | 75 (29.3) |
| IIA | 17 (6.6) |
| IIB | 30 (11.7) |
| IIIA | 36 (14.1) |
| IIIB | 5 (2.0) |
| IV | 24 (9.4) |