Qvar Therapy in Smoking Asthmatics
Comparative Effectiveness of Extrafine Hydrofluoroalkane Beclometasone Versus Fluticasone and Chlorofluorocarbon Beclometasone in Smoking Asthma - a Retrospective, Real-life Observational Study in a UK Primary Care Asthma Population
調査の概要
研究の種類
入学 (実際)
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
サンプリング方法
調査対象母集団
説明
Inclusion Criteria:
- Aged 16-70 years
- Current smokers - explicitly coded in patient records or captured in patient questionnaires
- Evidence of asthma diagnosis and current therapy: ≥2 prescriptions for asthma at different points in time during the baseline year ± a diagnostic code for asthma
- On-going asthma therapy: ≥2 prescription for ICS during the outcome period (i.e. ≥1 prescription in addition to IPD prescription)
- ≥2 years continuous data (i.e. ≥1 year of baseline plus ≥1 year of outcome data)
Exclusion Criteria:
Patients will be excluded from the analysis if they have:
- Any chronic respiratory disease other than asthma
- Are prescribed:
- Maintenance oral steroid therapy during the baseline year
- Combination ICS/long-acting beta agonist (LABA) therapy during baseline year or at IPD
- Multiple ICS prescriptions at IPD or immediately before .
研究計画
研究はどのように設計されていますか？
デザインの詳細
コホートと介入
グループ/コホート |
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IPDI EF HFA-BDP
-指標日に極細HFA-BDP MDIとして吸入コルチコステロイド療法を開始する患者
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IPDI FP
Patients initiating inhaled corticosteroid therapy as FP via pMDI at the index date
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IPDI NEF HFA-BDP
Patients initiating inhaled corticosteroid therapy as non-extra-fine HFA-BDP via pMDI at the index date
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IPDA EF HFA-BDP
Patients increasing inhaled corticosteroid therapy as extra-fine HFA-BDP MDI at the index date
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IPDA FP
Patients increasing inhaled corticosteroid therapy as FP MDI at the index date
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IPDA NEF HFA-BDP
Patients initiating inhaled corticosteroid therapy as non-extra-fine HFA-BDP via pMDI at the index date
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この研究は何を測定していますか？
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Asthma Control proxy incorporating SABA use
時間枠：1 year
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Where control is defined as absence of: (i)Respiratory-related: Hospital attendance or admission A&E attendance, OR Out of hours attendance, OR Out-patient department attendance (ii)GP consultations for lower respiratory tract infection (iii)Prescriptions for acute courses of oral steroids (iv)Average prescribed daily dose of albuterol or terbutaline of ≤200mg |
1 year
|
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Asthma Exacerbations (ATS Definition)
時間枠：1 year
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Defined as an absence of the the following:
|
1 year
|
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Exacerbation definition based on clinical experience
時間枠：1 year
|
Defined as: (i)Respiratory-related: Hospital attendance / admissions OR A&E attendance OR Out of hours consultation OR GP consultation OR (ii) Use of acute oral steroids |
1 year
|
|
Asthma control proxy excluding SABA usage
時間枠：1 year
|
Control defined as absence of: (i) Respiratory-related: Hospital attendance or admission A&E attendance, OR Out of hours attendance, OR Out-patient department attendance (ii)GP consultations for lower respiratory tract infection (iii)Prescriptions for acute courses of oral steroids |
1 year
|
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Treatment Success
時間枠：1 year
|
Success defined as: No respiratory-related: Hospital attendance or admission A&E attendance, OR Out of hours consultation, OR Out-patient department attendance No GP consultations for lower respiratory tract infection No prescriptions for acute courses of oral steroids No additional or change in therapy: Increased dose of ICS (≥50% increase), and/or Change in ICS and/or Change in delivery device, and/or Use of additional therapy as defined by: LABA, theophylline, leukotriene receptor antagonists (LTRAs). |
1 year
|
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Definite asthma-related hospitalisations
時間枠：1 year
|
Hospitalisations coded with an asthma read code
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1 year
|
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ICS Compliance
時間枠：1 year
|
Based on prescription refills
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1 year
|
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Incidence of oral thrust
時間枠：1 year
|
Identified as:
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1 year
|
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SABA Dose
時間枠：1 year
|
Average daily dose of short-acting beta-agonist over the outcome year
|
1 year
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Definite and probable asthma-related hospitalisations
時間枠：1 year
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Hospitalisations with an asthma read code + uncoded hospitalisations occurring within a 7-day window (either side of the hospitalisation date) of an asthma read code
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1 year
|
協力者と研究者
捜査官
- 主任研究者：David Professor Price、University of Aberdeen
出版物と役立つリンク
一般刊行物
- Price D, Martin RJ, Barnes N, Dorinsky P, Israel E, Roche N, Chisholm A, Hillyer EV, Kemp L, Lee AJ, von Ziegenweidt J, Colice G. Prescribing practices and asthma control with hydrofluoroalkane-beclomethasone and fluticasone: a real-world observational study. J Allergy Clin Immunol. 2010 Sep;126(3):511-8.e1-10. doi: 10.1016/j.jaci.2010.06.040. Epub 2010 Aug 9.
- Barnes N, Price D, Colice G, Chisholm A, Dorinsky P, Hillyer EV, Burden A, Lee AJ, Martin RJ, Roche N, von Ziegenweidt J, Israel E. Asthma control with extrafine-particle hydrofluoroalkane-beclometasone vs. large-particle chlorofluorocarbon-beclometasone: a real-world observational study. Clin Exp Allergy. 2011 Nov;41(11):1521-32. doi: 10.1111/j.1365-2222.2011.03820.x. Epub 2011 Jul 14.
- Hansell A, Hollowell J, Nichols T, McNiece R, Strachan D. Use of the General Practice Research Database (GPRD) for respiratory epidemiology: a comparison with the 4th Morbidity Survey in General Practice (MSGP4). Thorax. 1999 May;54(5):413-9. doi: 10.1136/thx.54.5.413.
- Ivanova JI, Birnbaum HG, Hsieh M, Yu AP, Seal B, van der Molen T, Emani S, Rosiello RA, Colice GL. Adherence to inhaled corticosteroid use and local adverse events in persistent asthma. Am J Manag Care. 2008 Dec;14(12):801-9.
研究記録日
主要日程の研究
研究開始
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。