Table 4.
Repeatability of PFTs and MRI Metrics in Patients With COPD
| ICC (P value) | CV mean (%) | CV range (%) | |
|---|---|---|---|
| FEV1 (%‐pred) | 0.934 (<0.001a) | 4.22 | 2.16–6.35 |
| FEV1/FVC | 0.987 (<0.001a) | 2.34 | 1.49–3.80 |
| DLCO (%‐pred) | 0.992 (<0.001a) | 8.73 | 3.91–16.15 |
| 3He VV% | 0.541 (0.061) | 4.08 | 2.21–8.86 |
| 129Xe VV% | 0.458 (0.095) | 13.01 | 9.62–25.28 |
| 3He ADCglob | 0.995 (<0.001a) | 2.98 | 1.48–5.61 |
| 129Xe ADCglob | 0.936 (<0.001a) | 2.77 | 1.68–5.88 |
ICC = intraclass correlation coefficient; CV = coefficient of variation.
Statistical significance level of P < 0.05.
a
Statistical significance level of P < 0.001.