TABLE 4.

Percentage of minimum clinically important difference responders for key outcome measures for the endoscopic lung volume reduction (ELVR) and no-ELVR groups at 3- and 6-month follow-up

	ELVR 3-month follow-up	No-ELVR 3-month follow-up	p-value	ELVR 6-month follow-up	No-ELVR 6-month follow-up	p-value
FEV1 ≥ +100 mL	70	11	<0.001	45	11	0.03
RV ≤ −430 mL	70	11	<0.001	70	17	0.001
6MWD ≥ +30 m	50	6	0.004	55	6	0.001
SGRQ ≤ −4 points	70	28	0.02	85	39	0.006
SGRQ ≤ −7 points	60	22	0.03	80	33	0.008

Data are presented as %, unless otherwise stated. FEV₁: forced expiratory volume in 1 s; RV: residual volume; 6MWD: 6-min walk distance; SGRQ: St George's Respiratory Questionnaire. p-values obtained by Fisher's exact test.