Abstract:
BACKGROUND:There are no validated patient diaries for evaluating respiratory symptoms in idiopathic pulmonary fibrosis (IPF). PURPOSE:To evaluate the performance properties of the chronic obstructive pulmonary disease (COPD) Evaluating Respiratory Symptoms™ (E-RS™: COPD) measure in patients with IPF. METHODS:Concept elicitation and cognitive interviews were conducted with IPF patients to evaluate content validity, including comprehensiveness, relevance, and interpretability of E-RS™ items in this patient population. Secondary analyses of IPF clinical study data were performed to evaluate the scoring structure of the tool. With modifications, reliability, validity, and responsiveness of the instrument (E-RS™: IPF) were evaluated. RESULTS:Qualitative interviews (n = 30) were conducted. During the elicitation interviews (n = 20), concept saturation for IPF respiratory symptoms was achieved; all respiratory symptoms covered by the E-RS™ were endorsed by ≥ 30% of the sample. During cognitive interviews (n = 10), all participants found the items interpretable and relevant. Factor analyses conducted via secondary analysis of IPF clinical study data identified no total score and four symptom scales: Chest, Breathlessness, Cough, and Sputum. Reliability of each scale was high (internal consistency [α] >0.85); 2-day reproducibility (ICC >0.88). Validity was supported through significant (P < 0.0001) relationships with the St. George's Respiratory Questionnaire (SGRQ), the University of California, San Diego Shortness of Breath Questionnaire (UCSD-SOBQ), and other variables. The scales were responsive to change when evaluated using SGRQ Symptoms, UCSD-SOBQ, and Patient Global Impression of Change as anchors (P < 0.01 to P < 0.0001). CONCLUSION:The E-RS™: IPF is a valid, reliable, and responsive tool for evaluating respiratory symptoms in patients with IPF.
journal_name
Respir Medjournal_title
Respiratory medicineauthors
Bacci ED,O'Quinn S,Leidy NK,Murray L,Vernon Mdoi
10.1016/j.rmed.2017.11.011subject
Has Abstractpub_date
2018-01-01 00:00:00pages
130-138eissn
0954-6111issn
1532-3064pii
S0954-6111(17)30392-Xjournal_volume
134pub_type
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journal_title:Respiratory medicine
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pub_type: 临床试验,杂志文章,随机对照试验
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2014-12-01 00:00:00
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更新日期:2008-09-01 00:00:00
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pub_type: 杂志文章
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pub_type: 临床试验,杂志文章,随机对照试验
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2001-05-01 00:00:00
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更新日期:2008-04-01 00:00:00
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