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Original Research: Chest Infections |

Validity and Reliability of the St. George’s Respiratory Questionnaire in Assessing Health Status in Patients With Chronic Pulmonary AspergillosisChronic Pulmonary Aspergillosis, Health Status

Khaled Al-shair, MD, PhD, FCCP; Graham T. W. Atherton, PhD; Deborah Kennedy, MPHe; Georgina Powell, MSc; David W. Denning, MD; Ann Caress, PhD
Author and Funding Information

From the UK National Aspergillosis Centre (Drs Al-shair, Atherton, and Denning and Mss Kennedy and Powell), University Hospital of South Manchester, The University of Manchester, Manchester Academic Health Science Centre, Manchester, England; College of Medicine (Dr Al-shair), Hadhramout University of Science and Technology, Hadhramout, Yemen; and School of Nursing, Midwifery and Social Work (Dr Caress), The University of Manchester, Manchester, England.

Correspondence to: Ann Caress, PhD, Education and Research Centre, University Hospital of South Manchester, Southmoor Rd, Manchester, M23 9LT, England; e-mail: Ann.caress@manchester.ac.uk


Funding/Support: The authors have reported to CHEST that no funding was received for this study.

Reproduction of this article is prohibited without written permission from the American College of Chest Physicians. See online for more details.


Chest. 2013;144(2):623-631. doi:10.1378/chest.12-0014
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Background:  Chronic pulmonary aspergillosis (CPA) markedly reduces lung function through progressive lung destruction. To date, however, health status in patients with CPA has not been studied. This is due, in part, to a lack of adequately validated scales. The St. George’s Respiratory Questionnaire (SGRQ) is widely used for several chronic respiratory diseases, but not for CPA. We examined the reliability and validity of SGRQ in CPA.

Methods:  Eighty-eight patients with CPA completed the SGRQ, the Short Form-36 Health Survey (SF-36), and the Medical Research Council (MRC) dyspnea scale. Lung function and BMI were also measured. Pearson correlation, t test, analysis of variance, and their equivalents for nonparametric data and multivariate linear and binary analyses were used.

Results:  The SGRQ components (symptoms, activity, and impact) and total scores achieved high internal consistency (Cronbach α = 0.77, 0.91, 0.86, and 0.94), and SGRQ components had good intercorrelation (r ≥ 0.41; P < .001) and correlated well with the total score (r ≥ 0.63; P < .001). There were high, intraclass, correlation coefficients for the total SGRQ and its dimensions (≥ 0.92). The SGRQ scores showed significant correlation with the MRC dyspnea scale and SF-36 components and differentiated between all grades of shortness of breath and different bands of disease severity (P < .05). In addition, patients with greater clinician-rated disease severity had more impairment of health status (P < .006). CPA severity was independently associated with impairment in health status, and COPD comorbidity significantly affected the health status in patients with CPA.

Conclusions:  SGRQ demonstrated a significant level of reliability and validity in measuring health status in CPA.

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