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J Bras Pneumol ; 47(6): e20210172, 2021.
Article in English, Portuguese | MEDLINE | ID: mdl-34932719

ABSTRACT

OBJECTIVE: To investigate the reliability, internal consistency and validity of the Brazilian Portuguese version of the University of California San Diego Shortness of Breath Questionnaire (UCSD SOBQ) in patients with interstitial lung disease (ILD). METHODS: Patients with ILD completed the questionnaire at three different time points, one week apart, with the assistance of two independent assessors. Intra- and inter-rater reliability were analysed via the intraclass correlation coefficient (ICC). Internal consistency was assessed with the Cronbach's alpha coefficient. For the validity analysis, associations between variables were assessed with Spearman's or Pearson's correlation coefficient. RESULTS: Thirty patients with ILD (idiopathic pulmonary fibrosis, connective tissue disease-associated pulmonary fibrosis, sarcoidosis, asbestosis or non-specific interstitial pneumonia) were included (15 men; mean age, 59 ± 10 years; DLCO: 46 [33-64] % predicted). UCSD SOBQ scores showed excellent agreement and internal consistency in the intra-rater analysis (ICC: 0.93 [0.85-0.97]; Cronbach alpha: 0.95) and in the inter-rater analysis (ICC: 0.95 [0.89-0.97]; Cronbach alpha: 0.95), as well as correlating significantly with dyspnoea (as assessed by the Medical Research Council scale; r = 0.56); Medical Outcomes Study 36-item Short-Form Health Survey domains bodily pain, general health, vitality and physical functioning (-0.40 ≤ r ≤ -0.74); six-minute walk distance (r = -0.38); and quadriceps muscle strength (r = -0.41). CONCLUSIONS: The Brazilian Portuguese version of the UCSD SOBQ is valid, is reliable and has internal consistency in patients with ILD in Brazil.


Subject(s)
Idiopathic Pulmonary Fibrosis , Lung Diseases, Interstitial , Aged , Brazil , Dyspnea/diagnosis , Dyspnea/etiology , Humans , Idiopathic Pulmonary Fibrosis/complications , Idiopathic Pulmonary Fibrosis/diagnosis , Lung Diseases, Interstitial/diagnosis , Male , Middle Aged , Psychometrics , Reproducibility of Results , Surveys and Questionnaires
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