Table 2. Health status outcomes of pulmonary rehabilitation.

Instrument	Baselinea	Changea	95% CIb
CCQ
Symptoms	2.87±1.24	−0.59±1.16	−0.70 to −0.48
Functional	2.86±1.34	−0.56±1.00	−0.65 to −0.46
Mental	2.86±1.74	−0.62±1.49	−0.76 to −0.48
Total	2.86±1.17	−0.58±0.92	−0.67 to −0.50
CAT
Total	20.23±7.33	−3.11±5.59	−3.63 to −2.59
SGRQ
Symptoms	63.66±21.77	−14.22±21.69	−16.24 to −12.21
Activities	63.58±19.82	−6.71±13.44	−7.96 to −5.47
Impact	39.21±18.81	−8.78±13.95	−10.08 to −7.49
Total	50.69±17.33	−9.04±12.11	−10.17 to −7.92
6MWD	427.73±110.18	80.19±54.72	75.01–85.37

N=451.

Abbreviations: CAT, COPD Assessment Test; CCQ, Clinical COPD Questionnaire; COPD, chronic obstructive pulmonary disease; mMRC, modified Medical Research Council Dyspnoea Scale; SGRQ, St George’s Respiratory Questionnaire; 6MWD, 6-min walking distance; 95% CI, 95% confidence interval;.

^aData were expressed as mean±s.d. Negative change represents improvement on the CCQ, CAT and SGRQ.

^bPaired t-tests were applied for the normally distributed data, Wilcoxon signed-rank tests for non-parametric data. All tests were significant with P<0.05 comparing pre- and post-pulmonary rehabilitation scores.