Table 5 Inter-session descriptive statistics and variability by selection method for forced vital capacity (FVC) and forced expiratory volume in one second (FEV1) (n = 156; 78 per visit).
From: A comparison of alternative selection methods for reporting spirometric parameters in healthy adults
Selection method | Variable | Visit 1 | Visit 2 | SD (L) | SRD (L) | SRD% | CV% | ICC (95% CI) | ||
|---|---|---|---|---|---|---|---|---|---|---|
Median (IQR) (L) | Mean ± SD (L) | Median (IQR) (L) | Mean ± SD (L) | |||||||
ATS/ERS standard | FEV1 | 3.32 (2.84, 3.87) | 3.41 ± 0.76 | 3.30 (2.80, 3.89) | 3.40 ± 0.76 | 0.08 | 0.23 | 6.68 | 2.41 | 0.98 (0.96, 0.99) |
FVC | 4.03 (3.44, 4.74) | 4.10 ± 0.91 | 3.92 (3.38, 4.57) | 4.09 ± 0.93 | 0.07 | 0.18 | 4.47 | 1.61 | 0.99 (0.98, 0.99) | |
ATS/ERS mean | FEV1 | 3.25 (2.76, 3.75) | 3.33 ± 0.76 | 3.21 (2.73, 3.85) | 3.32 ± 0.76 | 0.08 | 0.23 | 6.99 | 2.52 | 0.98 (0.96, 0.98) |
FVC | 3.96 (3.39, 4.64) | 4.02 ± 0.90 | 3.84 (3.31, 4.53) | 4.01 ± 0.92 | 0.08 | 0.21 | 5.33 | 1.92 | 0.99 (0.98, 0.99) | |
Mean of all | FEV1 | 3.27 (2.74, 3.78) | 3.33 ± 0.76 | 3.21 (2.74, 3.85) | 3.32 ± 0.75 | 0.07 | 0.20 | 5.99 | 2.16 | 0.98 (0.97, 0.99) |
FVC | 3.93 (3.36, 4.64) | 4.03 ± 0.90 | 3.86 (3.32, 4.52) | 4.01 ± 0.90 | 0.06 | 0.18 | 4.47 | 1.62 | 0.99 (0.98, 0.99) | |
Mean of 3 largest | FEV1 | 3.31 (2.81, 3.84) | 3.39 ± 0.77 | 3.29 (2.79, 3.94) | 3.38 ± 0.76 | 0.08 | 0.22 | 6.47 | 2.34 | 0.98 (0.97, 0.99) |
FVC | 4.02 (3.41, 4.69) | 4.09 ± 0.91 | 3.96 (3.41, 4.60) | 4.08 ± 0.91 | 0.07 | 0.18 | 4.46 | 1.61 | 0.99 (0.98, 0.99) | |
Peak effort | FEV1 | 3.31 (2.82, 3.81) | 3.38 ± 0.78 | 3.25 (2.79, 3.83) | 3.35 ± 0.74 | 0.10 | 0.27 | 8.17 | 2.95 | 0.97 (0.95, 0.98) |
FVC | 4.00 (3.37, 4.57) | 4.05 ± 0.92 | 3.93 (3.40, 4.54) | 4.06 ± 0.92 | 0.09 | 0.24 | 5.86 | 2.11 | 0.98 (0.97, 0.99) | |
