From: Validation of the portable Bluetooth® Air Next spirometer in patients with different respiratory diseases
Pearson correlation
ICC
FEV1(L)
0.976
FVC (L)
0.963
0.962
FEV1/FVC
0.947
0.945
FEF25–75%
0.953
0.948
PEF (L/sec)
0.922
MEF25%
0.909
0.906
MEF50%
0.944
0.942
MEF75%
0.946