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Table 2 EBC pH correlations

From: Exhaled breath condensate pH as a biomarker of COPD severity in ex-smokers

 

All

Ex-smokers

Current smokers

 

p-value

r

p-value

r

p-value

r

FEV 1 (%pred.)

<0.001

0.342

<0.001

0.452

0.313

0.118

FVC (%pred.)

0.001

0.265

<0.001

0.386

0.944

0.008

FEV 1 /FVC

<0.001

0.284

0.002

0.324

0.064

0.215

IC (%pred.)

0.05

0.200

0.025

0.299

0.927

0.015

TLC (%pred.)

0.297

-0.105

0.392

-0.113

0.644

-0.075

IC/TLC

0.173

0.113

0.191

0.153

0.411

0.098

RV (%pred.)

0.046

-0.200

0.044

-0.261

0.462

-0.120

RV/TLC

0.002

-0.303

0.006

-0.350

0.212

-0.204

DL CO (%pred.)

<0.001

0.304

<0.001

0.410

0.536

0.074

  1. FEV1: Forced expiratory volume in 1 second, FVC: forced vital capacity, IC: Inspiratory capacity, TLC: total lung capacity, RV: residual volume, DLCO: diffusing capacity for carbon monoxide
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Respiratory Research

ISSN: 1465-993X

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