Table 1.

Study quality-of-life questionnaires

Study Form	Baseline	Every 6 Mo	Annual Visits
		± 2 wk	± 1 mo
Medical use form		X	X
UCSD SOBQ	X	X	X
SGRQ	X	X	X
EQ-5D	X	X	X
PSG	X		X

Definition of abbreviations: EQ-5D = EuroQol 5 Dimensions; PSG = Paper Standard Gamble; SGRQ = St. George’s Respiratory Questionnaire; UCSD SOBQ = University of California San Diego Shortness of Breath Questionnaire.