Table 3

Internal consistency of QOL-B scales

	AIR-BX1 (N=266)		AIR-BX2 (N=274)
QOL-B V.3.0 scale	n*	Cronbach's α	n*	Cronbach's α
Respiratory Symptoms	246	0.84	254	0.79
Physical Functioning	260	0.92	267	0.91
Vitality	264	0.77	271	0.70
Role Functioning	253	0.83	255	0.86
Health Perceptions	260	0.79	265	0.75
Emotional Functioning	262	0.84	269	0.82
Social Functioning	253	0.78	259	0.76
Treatment Burden†	233	0.79	232	0.77

*QOL-B responses at baseline (day 0) were used for the analyses presented in this table.
†Patients who were not receiving treatment for bronchiectasis were instructed to skip the Treatment Burden scale.
QOL-B, Quality of Life-Bronchiectasis.