| Feasibility | Sensitivity | Specificity | AUCROC | ||
| EP | Controls | ||||
| Spirometry (ZFEV1/ZFEF25–75%) | 96% | 92% | 60% | 90% | 0.857 |
| LCI | 90% | 81% | 45% | 98% | 0.724 |
| ZDLCO | 71% | 85% | 20% | 95% | 0.699 |
| ZRV/TLC | 82% | 90% | 19% | 95% | 0.669 |
| ZsRaw | 100% | 100% | 31% | 96% | 0.632 |
AUCROC, area under the receiver operator characteristic curve; DLCO, diffusion of the lung for carbon monoxide; EP, extremely preterm; FEF25–75%, forced expiratory flow in the mid range; FEV1, forced expiratory volume in 1 s; LCI, lung clearance index; RV/TLC, residual volume/total lung capacity; sRaw, specific airway resistance.