Table 1.
Clinical Characteristics of the Study Population
| Characteristics | Number (%) |
|---|---|
| Age (years) | |
| Median ± interquartile range | 62 ± 15 |
| Range | 24–89 |
| Sex | |
| Male | 592/1075 (55.07) |
| Female | 483/1075 (44.93) |
| Smoking | |
| Nonsmokers | 578/1075 (53.77) |
| Smokers | 497/1075 (46.23) |
| Clinical cancer stage | |
| Stage I | 192/1075 (17.86) |
| Stage II | 54/1075 (5.02) |
| Stage III | 153/1075 (14.23) |
| Stage IV | 676/1075 (62.88) |
| Method of diagnosis | |
| Surgery resection | 346/1075 (32.19) |
| Percutaneous biopsy | 261/1075 (24.28) |
| Bronchoscopic biopsy | 276/1075 (25.67) |
| Cytology | 192/1075 (17.86) |
Notes: Data are presented as number/total (%) unless otherwise stated.