Pre- and post-operative values of FEV1 and % LAA (right and left side) of each patient
| Patient | 1 | 2 | 3 | 4 | 5 | 6 | All | All |
| LVRS | Bilateral | Bilateral | Unilateral right | Bilateral | Bilateral | Bilateral homogeneous | Median (IQR) | p-value |
| FEV1 pre % pred | 22 | 22 | 27 | 36 | 20 | 24 | 23 (21.5–29.3) | |
| FEV1 post % pred | 45 | 35 | 35 | 55 | 44 | 33 | 39 (34.5–47.5) | 0.028 |
| % LAA right pre | 73.3 | 41.6 | 50.3 | 52.1 | 23.7 | 37.3# | 50.3 (32.7–62.7) | |
| % LAA right post | 53.8 | 28.4 | 38.6 | 44.3 | 17.5 | 41# | 38.6 (23–49) | 0.043 |
| % LAA left pre | 63.5 | 55.9 | 44.3 | 52.7 | 32.6 | 33# | 54.3 (37.6–61.6) | |
| % LAA left post | 55.6 | 38.6 | 43.9 | 43.6 | 19.8 | 37# | 44.6 (25.8–53.1) | 0.068 |
FEV1: forced expiratory volume in 1 s; LAA: low attenuation area; LVRS: lung volume reduction surgery; IQR: interquartile range. #: not included for analysis of median and p-values.