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Table 3 Pearson correlation and ICC between the spirometric values obtained with the two spirometers, for each of the four patient subsets, namely: asthma, COPD, restrictive and normal

From: Validation of the portable Bluetooth® Air Next spirometer in patients with different respiratory diseases

 

Pearson correlation

ICC

Asthma

FEV1(L)

0.979

0.979

FVC (L)

0.972

0.969

FEV1/FVC

0.906

0.898

FEF25–75%

0.943

0.943

PEF (L/sec)

0.965

0.963

MEF25%

0.836

0.835

MEF50%

0.930

0.929

MEF75%

0.963

0.959

COPD

FEV1(L)

0.968

0.967

FVC (L)

0.924

0.914

FEV1/FVC

0.914

0.916

FEF25–75%

0.960

0.96

PEF (L/sec)

0.926

0.925

MEF25%

0.915

0.89

MEF50%

0.961

0.959

MEF75%

0.950

0.949

Restrictive

FEV1(L)

0.946

0.946

FVC (L)

0.947

0.942

FEV1/FVC

0.943

0.937

FEF25–75%

0.903

0.895

PEF (L/sec)

0.850

0.85

MEF25%

0.730

0.725

MEF50%

0.912

0.905

MEF75%

0.887

0.884

Normal

FEV1(L)

0.971

0.968

FVC (L)

0.975

0.974

FEV1/FVC

0.900

0.899

FEF25–75%

0.902

0.898

PEF (L/sec)

0.914

0.914

MEF25%

0.914

0.908

MEF50%

0.857

0.856

MEF75%

0.918

0.917

  1. *for all metrics p < 0.001