Spearman's linear correlation coefficient for the variables according to the type of surgery
| Variables | Coefficient (p‐value) | |
| Lobectomy | Pneumonectomy | |
| FEV1,ppo PA×postoperative FEV1 | 0.8818 (0.0003) | 0.6444 (0.0610) |
| FEV1,ppo SPECT×postoperative FEV1 | 0.8182 (0.0021) | 0.5021 (0.1684) |
| FEV1,ppo PA×FEV1,ppo SPECT | 0.9780 (<0.0001) | 0.9670 (<0.0001) |
FEV1,ppo: postoperative predicted forced expiratory volume in one second
FEV1: forced expiratory volume in one second
PA: planar acquisition
SPECT: quantitative lung perfusion scan with tomographic imaging