Table 2

Internal consistency and test-retest reliability of HRQOL questionnaires in non-cystic fibrosis bronchiectasis

Author 1st, yearHRQOL questionnaireInternal consistencyTest-retest reliability
DomainCronbach's αDomainICC
Wilson, 1997SGRQTotalNRTotal0.97
Symptoms0.90Symptoms0.93
Activity0.89Activity0.98
Impact0.92Impact0.94
Martinez-Garcia, 2005SGRQTotal0.90TotalNR
Symptoms0.81SymptomsNR
Activity0.87ActivityNR
Impact0.81ImpactNR
Chan, 2002SGRQTotal0.92Total0.93
Symptoms0.59Symptoms0.94
Activity0.91Activity0.84
Impact0.88Impact0.89
Quittner, 2010bQOL-B8 domains(range) 0.65–0.948 domains(range) 0.72–0.88
Quittner, 2010aQOL-B8 domains(range) 0.73–0.968 domainsNR
Quittner, 2014QOL-B V3.0*Physical functioning0.94Physical functioning0.88
Role functioning0.86Role functioning0.84
Vitality0.85Vitality0.67
Emotional functioning0.72Emotional functioning0.82
Social functioning0.66Social functioning0.85
Treatment burden0.84Treatment burden0.76
Health perceptions0.77Health perceptions0.78
Respiratory symptoms0.82Respiratory symptoms0.80
Quittner, 2015QOL-B V3.0Physical functioning0.91Physical functioning0.85
Role functioning0.84Role functioning0.86
Vitality0.73Vitality0.74
Emotional functioning0.83Emotional functioning0.79
Social functioning0.77Social functioning0.80
Treatment burden0.78Treatment burden0.76
Health perceptions0.77Health perceptions0.76
Respiratory symptoms0.81Respiratory symptoms0.83
Olveira, 2014QOL-B V3.0Physical functioning0.91Physical functioning0.88
Role functioning0.84Role functioning0.86
Vitality0.82Vitality0.78
Emotional functioning0.84Emotional functioning0.86
Social functioning0.70Social functioning0.78
Treatment burden0.72Treatment burden0.68
Health perceptions0.71Health perceptions0.83
Respiratory symptoms0.87Respiratory symptoms0.83
Murray, 2009LCQTotalNRTotal0.96
PhysicalNRPhysicalNR
PsychologicalNRPsychologicalNR
SocialNRSocialNR
Munoz, 2013LCQTotal0.91TotalNR
Physical0.94PhysicalNR
Psychological0.93PsychologicalNR
Social0.93SocialNR
Lee, 2012CATTotal0.84TotalNR
Guilemany, 2006SF-368 domains(range) 0.75–0.91NR
  • *The repeatability of QOL-B V.3.0 was not reported. Table presents data from QOL-B V.2.0.6

  • Cronbach's α coefficient >0.7 is considered acceptable for HRQOL questionnaires.

  • For references see also online supplementary material.

  • CAT, COPD assessment tool; HRQOL, health-related quality of life; ICC, intraclass correlation coefficient; LCQ, Leicester Cough Questionnaire; NR, not reported; QOL-B, Quality of Life-Bronchiectasis; SF-36, Short Form 36; SGRQ, St George's Respiratory Questionnaire.