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Table 3 Baseline characteristics and clinical course according to intensity of ventilatory support

From: Interest of a simple on-line screening registry for measuring ICU burden related to an influenza pandemic

Baseline characteristics Total No mechanical ventilation Mechanical ventilation without ARDS ARDS
without ECMO
ECMO
Number of patients (percentage) 391 105 (27%) 55 (14%) 181 (46%) 50 (13%)
Age in years, mean (SD) 46 (16) 40 (16) 52 (18) 48 (15) 37 (12)
SAPS III, mean (SD) 52 (17) 41 (13) 53 (14) 56.5 (17) 58.3 (17)
Duration of ventilation in days, median (IQR) 12 (5-24) 0 2 (4-10) 13 (7-21) 26 (12-37)
Length of stay in ICU in days, median (IQR) 10 (5-24) 4 (3-6) 8 (5-16) 17 (9-27) 26 (14-42)
Obesity, number (percentage) 115 (29%) 20 (19%) 16 (21%) 60 (33%) 23 (46%)
Mortality, number (percentage) 87 (22.2%) 2 (1.9%) 7 (12%) 56 (30.1%) 22 (44%)
  1. ARDS, acute respiratory distress syndrome; ECMO, extracorporal membrane oxygenation; ICU, intensive care unit; IQR, interquartile range; SAPS III, Simplified Acute Physiology Score III; SD, standard deviation.