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Table 2 Baseline characteristics of patients included in the meta-analysis

From: Effects of higher PEEP and recruitment manoeuvres on mortality in patients with ARDS: a systematic review, meta-analysis, meta-regression and trial sequential analysis of randomized controlled trials

Parameter Intervention (n = 1918) Control (n = 1952)
Age, years 55.7 (3.2) [n = 1919] 56.1 (5.3) [n = 1952]
Women, No (%) 732 (38) [n = 1918] 750 (38) [n = 1952]
PaO2/FIO2 at enrolment, mmHg 135.8 (14.4) [n = 1859] 134.7 (17.4) [n = 1892]
Respiratory system compliance, mL/cmH2O 32.9 (5.1) [n = 969] 32.0 (4.4) [n = 975]
Causes of lung injury   
 Pneumonia, No. (%) 920 (49) [n = 1878] 933 (49) [n = 1911]
 Aspiration, No. (%) 175 (13) [n = 1373] 185 (13) [n = 1376]
 Sepsis, No. (%) 495 (26) [n = 1908] 538 (28) [n = 1942]
 Multiple trauma, No. (%) 54 (4) [n = 1394] 72 (5) [n = 1432]
Ventilation parameters   
 Tidal volume, mL/kg of predicted body weight 7.3 (1.1) [n = 1909] 7.4 (1.2) [n = 1942]
 Set PEEP, cmH2O 11.2 (1.8) [n = 1643] 11.1 (2.1) [n = 1679]
 Driving pressure, cmH2O 15.4 (2.4) [n = 1575] 15.2 (2.1) [n = 1615]
 Plateau pressure, cmH2O 27.0 (2.8) [n = 1575] 26.8 (2.7) [n = 1615]
  1. Data are mean (standard deviation) or frequency (proportion). Number of patients for each variable is also reported, as data was missing or not reported as mean in all studies. Values are estimated means (standard deviations) calculated with a mixed-effects model using the DerSimonian-Laird method. PEEP positive end-expiratory pressure