Table 1. Patient demographics and tumor characteristics.
| Features | Values |
|---|---|
| Age at start of immunotherapy (years), median [interquartile range] | 65 [61–72] |
| Sex, n (%) | |
| Male | 201 (80.4) |
| Female | 49 (19.6) |
| Pathological type, n (%) | |
| Adenocarcinoma | 78 (31.2) |
| Squamous carcinoma | 115 (46.0) |
| Small cell carcinoma | 40 (16.0) |
| Mixed carcinoma | 17 (6.8) |
| Tobacco, n (%) | |
| Active smoker | 169 (67.6) |
| Never smoker | 81 (32.4) |
| Alcohol, n (%) | |
| Active | 71 (28.4) |
| Never | 179 (71.6) |
| Neoplasm staging, n (%) | |
| ≤ III* | 98 (39.2) |
| > III | 152 (60.8) |
| Therapy lines, n (%) | |
| ≤2 | 129 (51.6) |
| >2 | 121 (48.4) |
*, the TNM staging was based on the AJCC 8th edition (when the initial diagnosis). AJCC, American Joint Committee on Cancer.