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Table 2 Correlations between exercise test outcomes and PROs at baseline

From: Association between patient-reported outcomes and exercise test outcomes in patients with COPD before and after pulmonary rehabilitation

  6MWD (m) CPET
(Wmax)
CPET (VO2peak) CWRT
(t)
TUG
(t)
Q. Peak torque Q. Total work
mMRC score −0.65* −0.54* −0.40* −0.39* 0.49* −0.32* −0.43*
SGRQ-C total score −0.53* −0.48* −0.31* −0.35* 0.41* −0.26* −0.38*
CAT total score −0.37* −0.30* −0.21* −0.21* 0.27* −0.23* −0.26*
CCQ total score −0.48* −0.43* −0.30* −0.29* 0.34* −0.25* −0.34*
HADS-A score −0.25* −0.20* −0.10 −0.09 0.21* −0.16* −0.22*
HADS-D score −0.27* −0.22* −0.06 −0.08 0.26* −0.11 −0.20*
CDS total score 0.50* 0.40* 0.25* 0.24* −0.43* 0.28* 0.34*
  1. Correlations are reported as Pearson’s r or, in the case of ordinal and/or skewed variables or variables with significant outliers, as Spearman’s ρ; * p<0.001
  2. Abbreviations: mMRC, modified Medical Research Council scale; SGRQ-C, COPD-specific St. George Respiratory Questionnaire; CAT, COPD Assessment Test; CCQ, Clinical COPD Questionnaire; HADS-A, Hospital Anxiety and Depression Scale, Anxiety subscale; HADS-D, Hospital Anxiety and Depression Scale, Depression subscale; CDS, Care Dependency Scale; 6MWD, 6-min walking distance; CPET, Cardiopulmonary Exercise Test; Wmax, maximal achieved workload; VO2peak, peak oxygen uptake; t, time; CWRT, Constant Work-Rate Test; TUG, Timed ‘Up and Go’ test; Q, Quadriceps muscle