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Table 2 Analysis of the relationships between pulmonary function, IOS, CT, and patient-reported outcomes

From: Relationship between peripheral airway function and patient-reported outcomes in COPD: a cross-sectional study

 

SGRQ

MRC

HADS

 

symptom

activity

impacts

total

 

anxiety

depression

FEV1

-0.24

-0.41

-0.29

-0.36

-0.37

--

--

RV/TLC

--

0.40

--

0.29

0.46

--

--

DLCO/VA

--

--

--

--

--

--

--

R20

--

--

--

--

--

--

--

R5-R20

0.31

0.49

0.44

0.49

0.51

--

--

X5

-0.27

-0.51

-0.38

-0.46

-0.46

--

--

LAA%

--

0.27

--

--

0.41

--

--

WA%

--

--

--

--

--

--

--

  1. All values represent correlation coefficient (r).
  2. Missing data (--) indicate that there were no statistically significant relationships.
  3. FEV1 = forced expiratory volume in one second; RV = residual volume; TLC = total lung capacity; DLCO = carbon monoxide diffusing capacity; VA = alveolar volume R = resistance; X = reactance; LAA = low attenuation area; WA = wall area; SGRQ = St. George's Respiratory Questionnaire; MRC = Medical Research Council; HADS = Hospital Anxiety and Depression Scale