Evaluating Customized Antibiotic Duration (CDA) Strategy in Acute Exacerbations of COPD (CDA)
Evaluating Customized Antibiotic Duration (CDA) Strategy in Acute Exacerbations of COPD: Protocol for Randomized Controlled Trial
Introduction Acute exacerbations of chronic obstructive pulmonary disease (AECOPD) are a major source of morbidity, mortality and antibiotic consumption worldwide. Although international guidance now recommends short antibiotic courses for AECOPD, prescribing in many tertiary hospitals in Pakistan is neither standardised nor guideline-concordant, and prolonged courses remain common. Reducing unnecessary antibiotic exposure is a recognised strategy to contain antimicrobial resistance (AMR), but locally generated evidence on the safety and efficacy of shorter courses is lacking.
Method and analysis This multicentre, prospective, parallel-group, open-label, randomised controlled non-inferiority trial will compare a 7-day antibiotic regimen (experimental) with the locally conventional 14-day regimen (active control) in adults hospitalised with AECOPD requiring antibiotics. Participants will be randomised 1:1 with allocation stratified by site. The primary outcome is clinical success at Day 30 after randomisation, defined as resolution or substantial improvement of baseline exacerbation symptoms without need for additional systemic antibiotics, major treatment modification, or readmission for treatment failure. Assuming 80% clinical success in both arms, a non-inferiority margin of 7-or8 percentage points, one-sided α = 0.025 and 80% power, 251 participants per arm are required; allowing for 10% attrition, the target is 558 participants (279 per arm). The primary analysis will estimate the between-group risk difference with its two-sided 95% confidence interval in both the intention-to-treat and per-protocol populations; non-inferiority will be concluded if the lower confidence limit lies above 10 percentage points in both populations. Secondary outcomes include time to symptom resolution, antibiotic-related adverse events, treatment failure, relapse, rehospitalisation, all-cause mortality and antibiotic consumption.
Ethics and dissemination The ethical approval has been obtained from the Institutional Review Board of the hospital (IRB-113-07-08-25). The outcomes and findings will be disseminated through peer-reviewed journal articles and will engage policymakers on various forums, including clinical settings.
Discussion The optimal duration of antibiotic therapy for AECOPD remains uncertain. Shorter treatment courses may reduce antibiotic exposure, adverse events, and the development of AMR. This trial will compare the effectiveness and safety of 7-day and 14-day antibiotic regimens in patients with AECOPD. The findings may help inform clinical guidelines and promote more appropriate antibiotic use.
調査の概要
状態
状態
条件
条件
介入・治療
介入・治療
詳細な説明
Customised duration of antibiotic strategy appears to be a patient-centred approach that could be effective in avoiding unnecessary antibiotic use without compromising patient outcomes. However, insufficient evidence is available on the safety and efficacy of CAD in hospitals for treating AECOPD. Therefore, the study aims to assess the implementation of the CAD strategy in hospital settings.
Comparators choice The active comparator is a 14-day antibiotic course, representing the entrenched usual-care duration in participating hospitals rather than an internationally endorsed standard. Because the question is whether reduced antibiotic exposure preserves clinical benefit without an unacceptable loss of efficacy, an active-controlled non-inferiority design is appropriate. Framing 14 days as "usual care" (not as a guideline standard) is essential for correct interpretation, given that GOLD recommends 5 days.
Intervention description Participants in the experimental arm will receive a 7-day course, and those in the control arm a 14-day course of the same class of antibiotic. To preserve pragmatism and external validity, the specific agent will be selected by the treating physician according to institutional practice, suspected aetiology, available microbiology and patient factors; only the planned duration differs between arms. The agent, dose, route, frequency and any modification will be recorded on the case report form (CRF). All non-duration components of care - including microbiological sampling, patient education and counselling - will be applied identically in both arms so that the randomised contrast is restricted to treatment duration.
The duration thresholds and supporting clinical materials were informed by a formative consensus process using the Delphi method. Three structured rounds involving approximately 30 experts (prescribers, pharmacists and academics) from participating and reference hospitals (convened in January 2026) were used to agree on the intervention components and supporting materials; items not reaching ≥80% agreement after the third round were discarded. This consensus work informed the design of the intervention, but does not itself constitute a co-intervention that differs between arms-the intervention development strategies with Delphi and expert panellists.
Clinical success is defined as resolution or substantial improvement of signs and symptoms of AECOPD present at baseline, without the need for additional systemic antibiotic therapy, assessed at Day 7 and up to 14 (±2 days) after randomization.
A detailed file is uploaded in the documents section.
研究の種類
研究の種類
入学 (推定)
入学
段階
段階
- 適用できない
連絡先と場所
研究連絡先
研究連絡先
- 名前:Fazal Rabbi, MD
- 電話番号:+923035646227
- メール:faiz@bjmu.edu.cn
研究場所
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Pakistan
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Islamabad、Pakistan、パキスタン、44000
- CDA Hospital Islamabad
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コンタクト:
- Dr Fazal Rabbi
- 電話番号:+923035646227
- メール:faiz@bjmu.edu.cn
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-
参加基準
適格基準
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
説明
Inclusion Criteria:
- Adults aged 18 years or older
- Physician-diagnosed COPD, confirmed by post-bronchodilator spirometry (FEV1/FVC < 0.70) where available, or by documented prior spirometry consistent with COPD
- Current acute exacerbation of COPD requiring antibiotic therapy in the judgment of the treating physician, with at least two cardinal symptoms (increased dyspnoea, sputum volume, or sputum purulence)
- Able and willing to provide written informed consent and to comply with study procedures and follow-up
Exclusion Criteria:
- Documented infection requiring a defined prolonged antibiotic course (e.g. pneumonia with complications, bronchiectasis exacerbation, lung abscess, empyema)
- Need for immediate intensive care admission or invasive mechanical ventilation at presentation
- Severe immunosuppression (e.g. neutropenia, active malignancy on chemotherapy, organ transplantation, advanced HIV)
- Suspected or confirmed pulmonary tuberculosis or another respiratory infection requiring a different antimicrobial approach
- Pregnancy or breastfeeding
- Prior enrolment in this trial or current participation in another interventional AECOPD trial.
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
- 主な目的:ヘルスサービス研究
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:ダブル
アーム数
武器と介入
参加者グループ / アーム参加者グループ / アーム |
介入・治療介入・治療 |
|---|---|
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実験的:7-Day Antibiotic Course (Customized Duration)
Participants in this arm will receive a 7-day course of a systemic antibiotic, selected by the treating physician according to institutional practice, suspected aetiology, and available microbiology.
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Participants in this arm will receive a 7-day course of a systemic antibiotic.
The specific agent will be selected by the treating physician according to institutional practice, suspected aetiology, available microbiology and patient factors.
The agent, dose, route, frequency and any modification will be recorded on the case report form (CRF). Microbiological sampling, patient education and counselling will be provided as part of routine care.
他の名前:
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アクティブコンパレータ:14-Day Antibiotic Course (Usual Care)
Participants in this arm will receive a 14-day course of a systemic antibiotic.
The specific agent will be selected by the treating physician according to institutional practice, suspected aetiology, available microbiology and patient factors.
The agent, dose, route, frequency and any modification will be recorded on the case report form (CRF). Microbiological sampling, patient education and counselling will be provided as part of routine care.
|
Participants in this arm will receive a 14-day course of a systemic antibiotic.
The specific agent will be selected by the treating physician according to institutional practice, suspected aetiology, available microbiology and patient factors.
The agent, dose, route, frequency and any modification will be recorded on the case report form (CRF). Microbiological sampling, patient education and counselling will be provided as part of routine care.
他の名前:
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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
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Number of Participants with Clinical Success at Day 7 and Day 14
時間枠:7 and 14 days after randomization
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The primary outcome is clinical success at day 7 and 14 after randomisation, defined as resolution or substantial improvement of the exacerbation-related signs and symptoms present at baseline, without the need for additional systemic antibiotic therapy, major treatment modification, or hospital readmission attributable to treatment failure.
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7 and 14 days after randomization
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二次結果の測定
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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1. Number of Participants with Clinical Success, Treatment Failure, Relapse, Rehospitalization, Adverse Events, or Death
時間枠:Up to 30 days (clinical success assessed at Day 7 and Day 14)
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Composite reporting of participant-level clinical events: (a) clinical success at end of allocated therapy (Day 7 and Day 14); (b) treatment failure, defined as need for additional or alternative systemic antibiotics; (c) relapse of exacerbation during follow-up; (d) rehospitalization for any cause and for AECOPD; (e) antibiotic-related adverse events and serious adverse events; (f) all-cause mortality.
Each is reported as the number of participants experiencing the event; no aggregation into a single combined score is performed.
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Up to 30 days (clinical success assessed at Day 7 and Day 14)
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Time to Resolution of Exacerbation Symptoms
時間枠:Up to 30 days
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Time, in days, from randomization to resolution of exacerbation-related signs and symptoms.
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Up to 30 days
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Total Antibiotic Consumption per Participant
時間枠:Up to 30 days
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Total antibiotic consumption per participant, expressed in defined daily doses (DDD).
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Up to 30 days
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協力者と研究者
捜査官
捜査官
- 主任研究者:Fazal Rabbi, MD、Capital Development Authority (CDA) Hospital Islamabad
出版物と役立つリンク
一般刊行物
- Chan AW, Boutron I, Hopewell S, Moher D, Schulz KF, Collins GS, Tunn R, Aggarwal R, Berkwits M, Berlin JA, Bhandari N, Butcher NJ, Campbell MK, Chidebe RCW, Elbourne DR, Farmer AJ, Fergusson DA, Golub RM, Goodman SN, Hoffmann TC, Ioannidis JPA, Kahan BC, Knowles RL, Lamb SE, Lewis S, Loder E, Offringa M, Ravaud P, Richards DP, Rockhold FW, Schriger DL, Siegfried NL, Staniszewska S, Taylor RS, Thabane L, Torgerson DJ, Vohra S, White IR, Hrobjartsson A. SPIRIT 2025 statement: updated guideline for protocols of randomised trials. Lancet. 2025 May 17;405(10491):e19-e27. doi: 10.1016/S0140-6736(25)00770-6. Epub 2025 Apr 28.
- Wang Y, Zijp TR, Bahar MA, Kocks JWH, Wilffert B, Hak E. Effects of prophylactic antibiotics on patients with stable COPD: a systematic review and meta-analysis of randomized controlled trials. J Antimicrob Chemother. 2018 Dec 1;73(12):3231-3243. doi: 10.1093/jac/dky326.
- Vanoverschelde A, Van Hoey C, Buyle F, Den Blauwen N, Depuydt P, Van Braeckel E, Lahousse L. In-hospital antibiotic use for severe chronic obstructive pulmonary disease exacerbations: a retrospective observational study. BMC Pulm Med. 2023 Apr 25;23(1):138. doi: 10.1186/s12890-023-02426-3.
研究記録日
主要日程の研究
研究開始 (推定)
研究開始
一次修了 (推定)
一次修了
研究の完了 (推定)
研究の完了
試験登録日
最初に提出
最初に提出
QC基準を満たした最初の提出物
QC基準を満たした最初の提出物
最初の投稿 (実際)
最初の投稿
学習記録の更新
投稿された最後の更新 (実際)
投稿された最後の更新
QC基準を満たした最後の更新が送信されました
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
最終確認日
詳しくは
本研究に関する用語
追加の関連 MeSH 用語
その他の研究ID番号
その他の研究ID番号
- IRB-113-07-08-25
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
米国FDA規制機器製品の研究
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