Table 5. High resolution computed tomography findings according to chronic obstructive pulmonary disease groups.
| Variable | Non-smoker group | Tobacco smoker group | P value |
|---|---|---|---|
| Descriptive evaluation (thoracic radiologist) | |||
| Emphysema | 4 (25%) | 12 (80.0%) | <0.02 |
| Centrilobular emphysema | 4 (25%) | 12 (80.0%) | <0.01 |
| Paraseptal emphysema | 2 (12.5%) | 7 (46.7%) | >0.05 |
| Panlobular emphysema | 2 (13.3%) | ||
| Air trapping | 4 (25.0%) | 3 (20.0%) | >0.50 |
| Bronchiectasis | 7 (43.7%) | 2 (13.3%) | >0.05 |
| Quantitative evaluation (Yacta software) | |||
| Lung volume (cm3) | 4368.2±1358.2 | 5152.8±1124.8 | 0.09 |
| Volume of emphysema (cm3) | 173.3±814.6 | 577.1±641.6 | 0.09 |
| Emphysema index (%) | 2.7±4.4 | 17.5±28.7 | 0.07 |
| Lung mean density (HU) | -787.3±4.4 | -821.3±32.8 | 0.02 |
| Relative bronchial wall thickness 3rd-8th generation (%) | 31.6±26.9 | 52.7±15.8 | 0.01 |
| Pi10 | 0.34±0.1 | 0.44±0.25 | 0.18 |
| Measured bronchi (n) | 25.7±14.1 | 24.8±24.8 | 0.90 |
Data are reported as means±SD or number and percentage. Statistical analysis was done with Fisher's exact test or Wilcoxon test. HU: Hounsfield units; Pi10: normalized thickness of the bronchial wall.