Table 2 Patients with a predefined positive response (MCID) to pulmonary rehabilitation in terms of improvement in exercise tolerance, dyspnoea and quality of life

	All patients (n = 2962)	Comorbidity categories			χ2
	All patients (n = 2962)	0 (n = 1443)	1 (n = 1136)	⩾2 (n = 383)	χ2
6MWD +54 m (n (%))	1822 (61.5)	904 (62.6)	680 (59.8)	238 (62.4)	0.298
MRC grade −1 (n (%))	2416 (81.5)	1170 (81.0)	914 (80.3)	332 (87.1)	0.010
SGRQ total −4 (n (%))	1845 (62.2)	962 (66.6)	658 (57.9)	225 (59.0)	0.001
Withdrawal rate (%)	2.82	1.89	3.44	1.26	0.561

Data are presented as mean (SD).
6MWD, 6 min walking distance test; MCID, minimum clinically important difference; MRC, Medical Research Council dyspnoea score; SGRQ, St. George’s Respiratory Questionnaire total score.