TABLE 3

Baseline characteristics, interventions and outcomes of patients with acute respiratory distress syndrome (ARDS) after propensity score matching

Influenza virus alonep-value
Yes (n=73)No (n=73)
Cause of ARDS
 Influenza virus and co-pathogen8 (11)
 Aspiration14 (19)
 Non-influenza pulmonary infection36 (49)
 Nonpulmonary sepsis11 (15)
 Miscellaneous4 (6)
Baseline characteristics
 SAPS II score points47 (35–61)45 (35–59)0.87
 SOFA score points9 (7–11)10 (7–12)0.18
 Age years59 (48–65)57 (48–68)0.84
 Male sex49 (67)42 (58)0.23
 Coexisting condition
  Diabetes mellitus8 (11)9 (12)0.79
  Liver cirrhosis9 (12)12 (16)0.64
  Valvular and/or coronary disease with treatment10 (14)11 (15)0.81
  Aplasia and/or recent chemotherapy for solid tumour or haematological disease11 (15)11 (15)0.99
  COPD18 (25)12 (16)0.69
  Obesity19 (26)24 (33)0.36
 Severe ARDS#50 (68)46 (63)0.49
Interventions
 Prone positioning41 (56)39 (53)0.99
 Neuromuscular blockers73 (100)73 (100)>0.99
 Inhaled nitric oxide20 (27)17 (23)0.58
 Extracorporeal membrane oxygenation11 (15)13 (18)0.65
 Glucocorticoids30 (41)28 (38)0.73
 Vasopressors59 (81)65 (90)0.16
 Renal replacement therapy19 (26)18 (25)0.85
Outcomes
 Ventilator associated pneumonia9 (12)10 (14)0.80
 Mortality in the ICU21 (29)32 (44)0.06
 Ventilator-free days at day 286 (0–15)0 (0–14)0.13
 Mortality at day 2815 (20)28 (38)0.02

Data are presented as n (%) or median (interquartile range), unless otherwise stated. SAPS: Simplified Acute Physiology Score; SOFA: Sequential Organ Failure Assessment; ICU: intensive care unit. #: arterial oxygen tension/inspiratory oxygen fraction ratio ≤100 mmHg.