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Table 1 Main characteristics of the randomized and observational studies

From: The preventive effect of antiplatelet therapy in acute respiratory distress syndrome: a meta-analysis

Author, year

Study design

Number of centers; country

Study scale, total number (anti/non-anti)

Study population

Definition of antiplatelet therapy

Definition of ARDS

Kor, 2016 [18]

RCT

16; USA

390 (195/195)

Patients aged 18 years or older with an elevated risk of developing ARDS (LIPS ≥4)

Aspirin

Berlin definition

Vincent, 1985 [30]

RCT

1; Belgium

43 (16/17)

Patients developed an episode of non-cardiogenic shock due to hemorrhage, trauma or sepsis

Dipyridamole

Severe hypoxemia and generalized lung infiltrates with PAWP <14 mmHg

Mazzeffi, 2015 [32]

Retrospective cohort

1; USA

375 (181/194)

Patients received aortic valve replacement surgery with cardiopulmonary bypass

Aspirin

Berlin definition

Chen, 2015 [31]

Prospective cohort

1; USA

1149 (287/862)

Patients admitted to the ICU with a high risk of ARDS

Aspirin

AECC definition

Valerio, 2013 [11]

Retrospective cohort

1; USA

651 (272/379)

Patients admitted to the medical ICU with severe sepsis and septic shock on antiplatelet therapy before diagnosis of severe sepsis or septic shock.

Aspirin, clopidogrel

AECC definition

Kor, 2011 [33]

Prospective cohort

20; USA, 2; Turkey

3855 (976/2879)

Adult, non-surgical patients admitted to the hospital with at least one major risk factor for ALI

Aspirin

AECC definition

Erlich, 2011 [34]

Retrospective cohort

1; USA

161 (79/82)

Adult patients admitted to the ICU with at least one major risk factor for ALI

Aspirin, clopidogrel bisulfate, ticlopidine, hydrochloride, cilostazol, dipyramidole, anagrelide, or persantine

AECC definition

Ahmed, 2014 [36]

Population-based, nested case-control

2; USA

828 (414/414)a

Patients with hospital-acquired ARDS and matched controls

Aspirin, abciximab, cilostazol, clopidogrel,dipyridamole, eptifibatide, ticlopidine

AECC definition

Tuinman, 2012 [35]

Nested case-control

1; Netherlands

218 (109/109)a

Adult patients admitted to the medical-surgical ICU diagnosed with TRALI and matched controls

Aspirin, clopidogrel

The 2004 consensus definition of TRALI

  1. Abbreviations: RCT randomized controlled trial, anti/non-anti antiplatelet/non-antiplatelet, ICU intensive care unit, ARDS acute respiratory distress syndrome, ALI acute lung injury, LIPS Lung Injury Prediction Score, AECC American-European Consensus Conference, PAWP pulmonary artery wedge pressure, TRALI transfusion-related acute lung injury
  2. aIn case-control studies, the numbers represent the total number of patients (number of cases/number of controls)