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Table 3 Analysis of the relationships of health status and dyspnea to pulmonary function, IOS and CT by stepwise multiple regression analyses

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

  SGRQ
  symptoms activity impacts total MRC
Independent variables      
FEV1 -- -- -- -- 0.03
RV/TLC -- 0.02 -- -- 0.02
R5-R20 0.09 -- 0.19 0.24 0.27
X5 -- 0.26 -- -- --
LAA% -- -- -- -- 0.06
Cumulative r2 0.09 0.28 0.19 0.24 0.38
  1. All values represent coefficient of determination (r2).
  2. Missing data (--) indicate that independent variables were not statistically significant.
  3. FEV1 = forced expiratory volume in one second; RV = residual volume; TLC = total lung capacity; R = resistance; X = reactance; LAA = low attenuation area; SGRQ = St. George's Respiratory Questionnaire; MRC = Medical Research Council