. 2009 Apr 15;4:9–18.

Table 5.

Responsiveness to change of VSRQ and SGRQ over three months (N = 373)

Change in score between V2 and V3	Global rating of health^a
	Worsened n = 53	Stable n = 114	Improved n = 206
VSRQ global mean score	−0.82	2.38	6.66
n^b (MD^c)	39 (14)	89 (25)	177 (29)
SGRQ total mean score	3.08	−3.33	−9.30
n^b (MD^c)	48 (5)	108 (6)	198 (8)

Notes: Subgroups defined from the OTE; “worsened”: all OTE scores ≤0, and at least one OTE score <−1; “stable”: all OTE scores within [−1; +1]; “improved”: all OTE scores ≥0 and at least one OTE score >1;

patients whose global rating health and complete VSRQ at V2 and V3 were available; patients whose global rating health and SGRQ with at least 41 item completed at V2 and V3 were available;

MD, ie, patients whose VSRQ was incomplete at V2 and/or V3; patients whose SGRQ contained at least 10 missing items at V2 and/or V3.

Abbreviations: MD, missing data; OTE, Overall Treatment Effect Questionnaire; SGRQ, St George’s Respiratory Questionnaire; VSRQ, Visual Simplified Respiratory Questionnaire.