HRCT finding | Never-smokers | Exsmokers | Current smokers | |||||
0 | ≤5 | >5–10 | >10–25 | >25 | ≤10 | >10–25 | >25 | |
Subjects n | 18 | 21 | 56 | 190 | 139 | 14 | 52 | 97 |
Sub. dependent opacity# | 0.13 | 0.17 | 0.16 | 0.18 | 0.14 | 0.17 | 0.14 | 0.14 |
Sub. curvilinear opacity | 0.50 | 0.58 | 0.32 | 0.40 | 0.27 | 0.39 | 0.23 | 0.16 |
Sub. septal lines | 0.96 | 0.74 | 0.60 | 0.59 | 0.70 | 0.51 | 0.49 | 0.67 |
Parenchymal bands | 0.55 | 0.49 | 0.28 | 0.39 | 0.41 | 0.60 | 0.43 | 0.53 |
Sub. nodules | 0.36 | 0.25 | 0.17 | 0.24 | 0.24 | 0.15 | 0.18 | 0.20 |
Honeycombing | 0.06 | 0.02 | 0.00 | 0.05 | 0.03 | 0.00 | 0.10 | 0.10 |
Ground-glass opacity | 0.03 | 0.06 | 0.03 | 0.05 | 0.11 | 0.07 | 0.12 | 0.10 |
Centrilobular emphysema | 0.06 | 0.15 | 0.11 | 0.12 | 0.50 | 0.11 | 0.43 | 0.66 |
Paraseptal emphysema | 0.00 | 0.02 | 0.02 | 0.08 | 0.30 | 0.10 | 0.27 | 0.40 |
Panlobular emphysema | 0.06 | 0.22 | 0.11 | 0.13 | 0.40 | 0.23 | 0.25 | 0.33 |
Bullae | 0.08 | 0.04 | 0.04 | 0.05 | 0.23 | 0.04 | 0.22 | 0.22 |
Bronchial wall thickness# | 0.13 | 0.36 | 0.24 | 0.27 | 0.36 | 0.30 | 0.33 | 0.41 |
Bronchiectasis# | 0.14 | 0.16 | 0.12 | 0.14 | 0.16 | 0.19 | 0.13 | 0.17 |
Findings were scored from 0–5 unless otherwise indicated
Sub.: subpleural
#: scored from 0–3