Pulse Pressure and Outcomes After Out-of-Hospital Cardiac Arrest (STEP-PRESS)
STEP-PRESS: Association of Pulse Pressure With Early Mortality and Biomarker Outcomes After Out-of-Hospital Cardiac Arrest
調査の概要
状態
詳細な説明
STEP-PRESS is a predefined exploratory observational substudy nested within STEPCARE, an international, multicenter, randomized factorial trial of intensive-care strategies after out-of-hospital cardiac arrest. STEPCARE is registered as NCT05564754. The STEPCARE biomarker substudy is registered as NCT06471972.
STEP-PRESS will use data collected within the STEPCARE trial and applicable substudy approvals. No additional intervention, patient contact, or deviation from STEPCARE clinical management is planned for STEP-PRESS.
The source population will consist of randomized STEPCARE participants, excluding consent withdrawals. Pulse pressure will be calculated as systolic blood pressure minus diastolic blood pressure using recorded STEPCARE blood-pressure values. The primary exposure is cumulative low pulse-pressure burden, defined as the number of hours during 0 to 12 hours after randomization in which interpolated pulse pressure is below 40 mmHg.
The primary analysis population will be restricted to participants alive 12 hours after randomization, without mechanical circulatory support initiated before or within 24 hours after randomization, and with at least three valid recorded blood-pressure observations during 0 to 12 hours after randomization.
The primary outcome is all-cause mortality from the 12-hour landmark to day 7. Key secondary outcomes include mortality in a 24-hour landmark analysis, neurological biomarker endpoints, 30-day mortality, 6-month survival, and 6-month functional outcome. Six-month poor functional outcome will follow the parent STEPCARE definition of modified Rankin Scale score 4 to 6.
All STEP-PRESS objectives are associational. The substudy is not designed to test whether modifying pulse pressure improves outcomes.
研究の種類
入学 (実際)
連絡先と場所
研究場所
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Malmö、スウェーデン、20205
- Department of Intensive Care, Skåne University Hospital
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参加基準
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
サンプリング方法
調査対象母集団
説明
Inclusion Criteria:
- Randomized in the STEPCARE trial.
- Out-of-hospital cardiac arrest.
- Stable return of spontaneous circulation, defined in the parent STEPCARE protocol as at least 20 minutes without chest compressions.
- Unconsciousness after sustained return of spontaneous circulation, defined as not being able to obey verbal commands, or intubated and sedated because of agitation.
- Eligible for intensive care without restrictions or limitations.
- Included in STEPCARE within the parent-trial inclusion window.
- For STEP-PRESS analyses, availability of recorded STEPCARE blood-pressure data sufficient to calculate pulse pressure for the relevant analysis population.
- For the primary STEP-PRESS analysis population: alive 12 hours after randomization, without mechanical circulatory support initiated before or within 24 hours after randomization, and with at least three valid recorded blood-pressure observations during 0 to 12 hours after randomization.
Exclusion Criteria:
- Withdrawal of consent for use of STEPCARE trial data.
- Trauma or hemorrhage as the presumed cause of cardiac arrest.
- Suspected or confirmed intracranial hemorrhage.
- On extracorporeal membrane oxygenation before STEPCARE randomization.
- Pregnancy.
- Previously randomized in the STEPCARE trial.
- For STEP-PRESS primary and 24-hour landmark analyses: mechanical circulatory support initiated before or within 24 hours after randomization.
- For endpoint-specific analyses: missing data required to define the relevant exposure, outcome, or biomarker endpoint.
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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STEPCARE Participants
Randomized STEPCARE participants included in the STEP-PRESS source population, excluding consent withdrawals.
STEP-PRESS will evaluate pulse-pressure burden as an observational exposure using recorded STEPCARE blood-pressure values.
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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 |
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All-Cause Mortality From 12 Hours to Day 7
時間枠:From 12 hours after randomization through day 7 after randomization
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Death from any cause occurring after the 12-hour landmark and through day 7 after randomization, evaluated in relation to cumulative low pulse-pressure burden below 40 mmHg during 0 to 12 hours after randomization.
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From 12 hours after randomization through day 7 after randomization
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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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All-Cause Mortality in the 24-Hour Landmark Analysis
時間枠:From 24 hours after randomization through day 7 after randomization
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Death from any cause occurring after the 24-hour landmark and through day 7 after randomization, evaluated in relation to cumulative low pulse-pressure burden below 40 mmHg during 0 to 24 hours after randomization.
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From 24 hours after randomization through day 7 after randomization
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Neurofilament Light Level at 12 Hours
時間枠:12 hours after randomization
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Neurofilament light concentration at 12 hours after randomization, analyzed among participants in the STEPCARE biomarker substudy with available biomarker data.
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12 hours after randomization
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Neuron-Specific Enolase Level at 48 Hours
時間枠:48 hours after randomization
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Neuron-specific enolase concentration at 48 hours after randomization, analyzed using available STEPCARE measurements.
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48 hours after randomization
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30-Day All-Cause Mortality
時間枠:30 days after randomization
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Death from any cause within 30 days after randomization.
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30 days after randomization
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6-Month Survival
時間枠:6 months after randomization
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Survival status at 6 months after randomization.
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6 months after randomization
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Poor Functional Outcome at 6 Months
時間枠:6 months after randomization
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Poor functional outcome at 6 months after randomization, defined according to the parent STEPCARE definition as modified Rankin Scale score 4 to 6.
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6 months after randomization
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協力者と研究者
スポンサー
出版物と役立つリンク
便利なリンク
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (推定)
研究の完了 (推定)
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 (実際)
学習記録の更新
投稿された最後の更新 (実際)
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
本研究に関する用語
キーワード
追加の関連 MeSH 用語
その他の研究ID番号
- STEP-PRESS
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?
IPD プランの説明
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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