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Patient characteristics
| Obese (e.g., BMI > 24.9) | |
| No, n (%) | 151 (37.8%) |
| Yes, n (%) | 247 (61.9%) |
| Unknown, n (%) | 1 (0.3%) |
| Sex | |
| Female, n (%) | 228 (57.1%) |
| Male, n (%) | 171 (42.9%) |
| Smoking history | |
| Never, n (%) | 60 (15.0%) |
| Ever, n (%) | 338 (84.7%) |
| Unknown, n (%) | 1 (0.3%) |
| History of lung cancer | |
| No, n (%) | 334 (83.7%) |
| Yes, n (%) | 64 (16.0%) |
| Unknown, n (%) | 1 (0.3%) |
| History of COPD | |
| No, n (%) | 216 (54.1%) |
| Yes, n (%) | 182 (45.6%) |
| Unknown, n (%) | 1 (0.3%) |
