Table 1.
Baseline characteristics of all 256 emphysema patients with absent collateral ventilation who underwent valve therapy.
| n | Mean ± SD | |
|---|---|---|
| Demographics | ||
| Age (years) | 256 | 64.5 ± 7.0 |
| Weight (kg) | 256 | 66.5 ± 14.9 |
| Height (m) | 256 | 1.68 ± 0.09 |
| BMI (kg/m²) | 256 | 23.6 ± 4.4 |
| Lung function | ||
| VC (L) | 256 | 2.32 ± 0.77 |
| VC (%) | 254 | 68.5 ± 18.4 |
| FEV1 (L) | 256 | 0.79 ± 0.25 |
| FEV1 (%) | 255 | 30.4 ± 8.3 |
| RV (L) | 254 | 5.70 ± 1.34 |
| RV (%) | 255 | 260.8 ± 54.8 |
| TLC (L) | 254 | 8.07 ± 1.66 |
| TLC (%) | 256 | 139.6 ± 20.5 |
| TLCO SB (%) | 206 | 32.6 ± 10.5 |
| TLCO/VA (%) | 212 | 47.5 ± 15.8 |
| Exercise capacity and symptoms | ||
| 6-MWT (m) | 236 | 270.0 ± 107.6 |
| mMRC | 220 | 2.8 ± 1.1 |
6-MWT, 6-minute walk test; BMI, body mass index; FEV1, forced expiratory volume in 1 s; mMRC, modified Medical Research Council; RV, residual volume; TLC, total lung capacity; TLCO SB, transfer factor for carbon monoxide, single breath. TLCO/VA, transfer factor for carbon monoxide, adjusted for alveolar volume; VC, vital capacity.