Table 3 Correlation and agreement of primary and secondary outcomes between the portable and laboratory spirometers
From: Reliability and usability of a portable spirometer compared to a laboratory spirometer
Parameter | R | ICC | Mean difference (95% LoA) | Points within 95% LoA (%) |
|---|---|---|---|---|
FEV1 | 0.994 | 0.994 | -0.015 (-0.185, 0.155) | 96.0 |
FVC | 0.993 | 0.993 | 0.005 (-0.207, 0.218) | 96.0 |
FEV1/FVC | 0.981 | 0.980 | -0.380 (-6.456, 5.696) | 96.0 |
PEF | 0.974 | 0.973 | -0.219 (-1.149, 0.711) | 94.4 |
FEF25−75% | 0.982 | 0.981 | 0.172 (-0.309, 0.652) | 92.1 |
VC | 0.980 | 0.980 | 0.011 (-0.362, 0.384) | 98.4 |
MVV | 0.983 | 0.983 | -1.195 (-13.479, 11.089) | 94.4 |
FEV6 | 0.995 | 0.995 | 0.023 (-0.187, 0.233) | 97.5 |
FEV1/FEV6 | 0.968 | 0.968 | -0.700 (-7.256, 5.856) | 95.0 |