Table 1 Demographics of the subjects for analysis 1
|  | Overall | Better-quality scans [Proxy for inspiration > 0.8 and < 1.2] |
|---|---|---|
No. of subjects | 170 | 144 |
Age | 71 ± 9 | 72 ± 8 |
Sex (Male: Female) | 162: 8 | 139: 5 |
Body mass index | 22 ± 3 | 22 ± 3 |
Pack-years | 61 ± 35 | 62 ± 36 |
Pulmonary function | ||
 FEV1 (% predicted) | 61 ± 21 | 60 ± 21 |
 TLC (L) | 5.8 ± 1.0 | 5.8 ± 1.0 |
 RV/TLC (%) | 41 ± 8 | 42 ± 8 |
 DLCO (% predicted) | 56 ± 19 | 53 ± 19 |
 DLCO/VA | 2.9 ± 1.1 | 2.8 ± 1.0 |
CT | ||
 LAA% (%) | 29 ± 9 | 30 ± 9 |
 CT-TLV (L) | 5.2 ± 1.0 | 5.4 ± 1.0 |
 Proxy for inspiration | 0.91 ± 0.12 | 0.93 ± 0.08 |
 15th percentile (HU) | −988 ± 23 | − 991 ± 22 |
 25th percentile (HU) | − 959 ± 24 | − 962 ± 22 |
 35th percentile (HU) | − 935 ± 24 | − 938 ± 23 |