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Table 4 Multivariate linear regression: dependent variable is (A) logtransformed AWT 3.5 and (B) FEV 1 % predicted

From: Low-dose CT measurements of airway dimensions and emphysema associated with airflow limitation in heavy smokers: a cross sectional study

Dependent variable

A. Log-AWT3.5

B. FEV1,% predicted

Beta

p-value

Beta

p-value

FEV1,% predicted

−0.010

<0.001

  

Log-AWT3.5

  

−31.28

<0.001

Emphysema; Perc15

0.005

<0.001

0.342

<0.001

Lung volume

−0.037

0.005

0.209

0.773

Pack-years

0.002

0.031

−0.029

0.499

Smoking (former/current)

−0.011

0.700

−2.756

0.086

Cough

0.030

0.404

−0.408

0.834

CMH

−0.026

0.447

−2.098

0.262

Dyspnea

−0.007

0.828

−2.945

0.116

Wheezing

0.058

0.124

−4.004

0.051

  1. Definition of abbreviations: Log-AWT3.5 = logtransformed airway wall thickness at 3.5 mm diameter; CMH =chronic mucus hypersecretion.