Table 4 Relationship between pulmonary function parameters and the presence of asthma in multiple logistic regression with stepwise selection (subjects with obstructive diseases only)

1.

FEV₁/FVC

1.043 (1.012–1.074)

<0.0001

MEF25, %predicted

1.024 (1.010–1.038)

0.0024

PEF, %predicted

1.018 (1.006–1.030)

0.0088

R_AW, %predicted

1.002 (1.000–1.004)

0.0320

2.

FEV₁, %predicted

1.029 (1.013–1.046)

<.0001

MEF25, %predicted

1.022 (1.010–1.035)

0.0015

R_AW, %predicted

1.002 (1.000–1.004)

0.0287

FRC, %predicted

0.981 (0.973–0.989)

<.0001

3.

DL_CO, %predicted

1.071 (1.051–1.090)

<.0001

FEV₁/FVC

1.051 (1.024–1.078)

<.0001

TLC, %predicted

1.040 (1.014–1.067)

0.0021

FRC, %predicted

0.970 (0.956–0.984)

0.0041