Skip to main content

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