Validation of the IPF-specific version of St. George's Respiratory Questionnaire.
Respir Res
; 20(1): 199, 2019 Aug 28.
Article
em En
| MEDLINE
| ID: mdl-31462235
ABSTRACT
BACKGROUND:
Patients with idiopathic pulmonary fibrosis (IPF) have impaired health-related quality of life (HRQL). To measure HRQL, an IPF-specific version of the St. George's Respiratory Questionnaire (SGRQ-I) was developed, but not sufficiently validated. This study aimed to assess the validity (i.a. known-groups validity and concurrent validity) and test-retest reliability of SGRQ-I in IPF patients with different disease durations.METHODS:
Patients with IPF were consecutively recruited and completed SGRQ, SGRQ-I, King's Brief Interstitial Lung Disease questionnaire (K-BILD), University of California, San Diego Shortness of Breath Questionnaire (SOBQ) and Short Form-36 (SF-36) along with pulmonary function tests and a 6-min walk test (6MWT) at baseline. After two weeks, SGRQ-I and Global Rating of Change Scales (GRCS) were completed.RESULTS:
At baseline and after two weeks, 150 and 134 patients completed the questionnaires, respectively. The internal consistency of SGRQ-I was high (Cronbach's α = 0.92). Good concurrent validity was demonstrated by high intraclass correlation coefficients (ICC = 0.97), Bland-Altman plots and moderate to strong correlations to K-BILD, SOBQ and SF-36 (r = - 0.46 to 0.80). High ICC (0.92) and a Bland-Altman plot indicated good test-retest reliability. SGRQ-I was good at discriminating between patients with different stages of disease (Δscore > 18.1, effect sizes > 0.10). Validity was similar across groups of different disease duration.CONCLUSIONS:
SGRQ-I proved to be valid at distinguishing between different disease severities, valid compared to other HRQL instruments, applicable across different disease durations and reliable upon repetition. SGRQ-I is a valid option for measuring HRQL in patients with IPF. TRIAL REGISTRATION The study was registered at clinicaltrials.org ( NCT02818712 ) on 15 June 2016.Palavras-chave
Texto completo:
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Bases de dados:
MEDLINE
Assunto principal:
Qualidade de Vida
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Tradução
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Inquéritos e Questionários
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Fibrose Pulmonar Idiopática
Tipo de estudo:
Clinical_trials
/
Etiology_studies
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Incidence_studies
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Observational_studies
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Risk_factors_studies
Limite:
Aged
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Aged80
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Female
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Humans
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Male
País/Região como assunto:
Europa
Idioma:
En
Revista:
Respir Res
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Dinamarca