Table 1 Selection methods for forced vital capacity (FVC) and forced expiratory volume in one second (FEV1) indices for a spirometry session.
From: A comparison of alternative selection methods for reporting spirometric parameters in healthy adults
Selection method | Repeatability criteria | Total number of maneuvers considered to establish repeatability (intra-session comparison) | Selection of single FVC and FEV1 from repeatable maneuvers (inter-session comparison) | Selection of PEF and FEF25–75 from repeatable maneuvers (inter-session comparison) |
|---|---|---|---|---|
1. ATS/ERS | Largest and second largest FVC and FEV1 ≤ 0.15 L | Rolling inclusion of trials until repeatability achieved (at least 3) | Largest | Best sum of FVC and FEV1 |
2. Modified ATS/ERS | Largest and second largest FVC and FEV1 ≤ 0.15 L | Rolling inclusion of trials until repeatability achieved (at least 3) | Mean | Mean |
3. Mean of all | Largest and second largest FVC and FEV1 ≤ 0.15 L | All | Mean | Mean |
4. Mean of three largest | Largest and second largest FVC and FEV1 ≤ 0.15 L | All | Mean of three largest | Mean for three largest sums of FVC and FEV1 |
5. Peak effort | Largest and second largest PEF ≤ 10% | All | Trial with largest PEF | Trial with largest PEF |
