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Table 1 Patients baseline, ventilation, and outcome characteristics

From: The diagnostic accuracy for ARDS of global versus regional lung ultrasound scores - a post hoc analysis of an observational study in invasively ventilated ICU patients

 No ARDSARDSP valueARDS severity groups
MildModerateSevereP value
N11735 12185 
Demographics
 Age—years62 (51, 72)58 (48, 69)0.1566 (52, 70)57 (29, 69)53 (46, 55)0.201
 Male—%69 (59.0)21 (60.0)15 (41.7)12 (66.7)4 (80.0)0.281
 APACHE II21 (17, 27)20 (15, 26)0.32420 (16, 27)20 (14, 24)24 (20, 27)0.708
 APS38 (15, 52)39 (16, 55)0.71222 (15, 50)27 (17, 54)60 (54, 63)0.333
 SOFA9 (7, 12)11 (8, 13)0.2189 (7, 12)11 (8, 13)13 (12, 15)0.043
Clinical insulta
 Sepsis—%27 (23.1)11 (31.4)0.3744 (33.3)4 (22.2)3 (60.0)0.334
 Pneumonia—%17 (14.5)17 (48.6)< 0.0017 (58.3)9 (50.0)1 (20.0)0.426
 Stroke—%26 (22.2)1 (2.9)0.0061 (8.3)0 (0.0)0 (0.0)0.486
 Surgery—%24 (20.5)4 (11.4)0.3211 (8.3)2 (11.1)1 (20.0)0.620
 Trauma—%15 (12.8)2 (5.7)0.3621 (8.3)0 (0.0)1 (20.0)0.118
 Other—%26 (22.2)9 (25.7)0.6532 (16.7)7 (38.9)0 (0.0)0.210
Ventilation
 PEEP—cm H2O5 (5, 7)10 (7, 12)< 0.0017 (6, 10)10 (8, 14)15 (10, 15)0.014
 PaO2/FiO2315 (234, 380)163 (124, 247)< 0.001255 (247, 278)144 (125, 171)73 (68, 81)< 0.001
 Pmax—mmHg17 (14, 22)28 (21, 31)< 0.00126 (22, 29)29 (20, 33)29 (27, 30)0.446
 RR—breaths per min18 (14, 23)27 (19, 32)< 0.00125 (21, 31)29 (19, 33)22 (12, 29)0.692
 FiO20.30 (0.25, 0.40)0.45 (0.34, 0.60)< 0.0010.30 (0.29, 0.33)0.55 (0.42, 0.60)1 (0.90, 1)< 0.001
 Minute volume—l/min8.8 (7.2, 10.8)10.8 (9.2, 13.3)< 0.0019.7 (9.2, 10.6)12.5 (10.5, 13.3)14.1 (6.9, 15.2)0.233
TV—ml/PBW8.0 (6.6, 9.2)6.9 (5.7, 9.3)0.2758.6 (6.6, 9.3)6.9 (5.5, 9.4)5.9 (3.5, 7.2)0.279
Outcomes
 Duration of MV—days3 (1, 8)9 (3, 18)< 0.0014 (2, 11)12 (7, 18)3 (2, 19)0.131
 ICU mortality—%37 (31.6)13 (37.1)0.5453 (25.0)5 (27.8)5 (100.0)0.007
 Hospital Mortality—%47 (40.2)13 (37.1)0.8453 (25.0)5 (27.8)5 (100.0)0.007
 Ventilator free days19 (0, 24)5 (0, 19)0.03816 (2, 21)7 (0, 18)0 (0, 0)0.030
  1. Values are presented as N(%) or median (interquartile range)
  2. Ventilatory parameters refer to the moment of the lung ultrasound examination
  3. APACHE Acute Physiology and Chronic Health Evaluation score, APS acute physiology score, SOFA sequential organ failure assessment score, ARDS acute respiratory distress syndrome, ICU intensive care unit, FiO2 fraction of inspired oxygen, PEEP positive end-expiratory pressure, Pmax maximal inspiratory airway pressure, RR respiratory rate, TV tidal volume, PBW predicted body weight, SpO2 pulse oximetry oxygen saturation, PaO2 arterial partial pressure of oxygen
  4. aNon-exclusive categories