TABLE 2.
Characteristics of subjects with and without each type of emphysema
| Visual emphysema | CLE | PSE | ||||
| + | − | + | − | + | − | |
| Subjects | 67 (39.0) | 105 (61.0) | 36 (20.9) | 136 (79.1) | 53 (30.8) | 119 (69.2) |
| Age, years | 45.3±2.6 | 45.2±2.7 | 45.8±2.5 | 45.2±2.7 | 45.1±2.7 | 45.4±2.7 |
| Male | 92.5 | 86.7 | 88.9 | 89.0 | 94.3 | 86.6 |
| Height, cm | 172.0±6.1 | 170.5±6.8 | 172.7±5.6 | 170.7±6.7 | 171.7±6.3 | 170.9±6.6 |
| BMI, kg·m−2 | 23.2±3.1* | 24.7±3.8 | 22.9±3.3* | 24.5±3.7 | 23.1±3.1* | 24.6±3.8 |
| Current smoker | 88.1 | 81.9 | 86.1 | 83.8 | 90.6 | 81.5 |
| FEV1/FVC | 0.80±0.06 | 0.81±0.05 | 0.78±0.07* | 0.81±0.05 | 0.80±0.06 | 0.81±0.06 |
| FEV1/FVC <0.70 | 4.5 | 1.9 | 8.3* | 1.5 | 3.8 | 2.5 |
| FEV1/FVC <0.75 | 19.4* | 7.6 | 22.2* | 9.6 | 17.0 | 10.1 |
| FEV1, % pred | 92.5±12.2 | 95.9±11.6 | 90.4±12.2* | 95.7±11.6 | 92.7±12.2 | 95.5±11.7 |
| CLE | 53.7 | 0.0 | 41.5* | 11.8 | ||
| PSE | 79.1 | 0.0 | 61.1* | 22.8 | ||
| LAA% ≥5 | 23.9* | 12.4 | 27.8* | 14.0 | 22.6 | 14.3 |
| WT segmental, mm | 1.35±0.12 | 1.33±0.11 | 1.36±0.13 | 1.33±0.11 | 1.35±0.13 | 1.33±0.11 |
| WT subsegmental, mm | 1.19±0.08 | 1.19±0.08 | 1.19±0.08 | 1.19±0.08 | 1.18±0.09 | 1.19±0.08 |
| LA segmental, mm2 | 23.3±5.6 | 22.8±5.9 | 23.6±5.6 | 22.8±5.8 | 22.9±5.0 | 23.0±6.1 |
| LA subsegmental, mm2 | 14.2±3.7 | 13.5±3.3 | 14.2±4.0 | 13.6±3.3 | 13.8±3.4 | 13.7±3.5 |
| ALR | 0.04±0.00 | 0.04±0.00 | 0.04±0.00 | 0.04±0.00 | 0.04±0.00 | 0.04±0.00 |
| TLCCT, L | 5.49±1.01 | 5.28±0.90 | 5.53±0.96 | 5.32±0.94 | 5.52±1.02 | 5.29±0.90 |
| TLCCT, % pred | 83.4±13.3 | 82.3±10.6 | 84.1±14.0 | 82.4±11.1 | 83.8±13.1 | 82.3±11.0 |
Data are presented as n (%), mean±sd or %. CLE: centrilobular emphysema; PSE: paraseptal emphysema; BMI: body mass index; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; LAA: percentage of low attenuation area < −950 HU to the total lung; WT: wall thickness; LA: lumen area; ALR: airway/lung ratio; TLCCT: total lung capacity on computed tomography. *: p<0.05 compared with subjects without the same type of emphysema.