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Table 1 Patients’ baseline characteristics

From: Oxygen reserve index for non-invasive early hypoxemia detection during endotracheal intubation in intensive care: the prospective observational NESOI study

Age, years 59 [43–66]
Gender, female 22 (43.14%)
Body mass index, kg m−2 24.22 [20.81–29.73]
Past medical history
 Active smoking 13 (25.49%)
 Chronic arterial hypertension 12 (23.52%)
 Diabetes mellitus 7 (13.72%)
 Cancer and/or immunodepression 9 (17.64%)
 Cirrhosis 9 (17.64%)
 Chronic obstructive apnoea 4 (7.84%)
 History of hepatic encephalopathy 3 (5.88%)
 Chronic respiratory disease 2 (3.92%)
 Neuromuscular disease 2 (3.92%)
 Other 9 (17.64%)
Reason for ICU admission
 Acute neurologic failure 29 (56.80%)
 Acute respiratory failure 10 (19.61%)
 Shock 7 (13.73%)
 Acute renal failure 5 (9.80%)
Reason for endotracheal intubation
 Drug and/or alcohol poisoning 9 (17.65%)
 Hepatic encephalopathy 5 (9.80%)
 Post-extubation respiratory distress 5 (9.80%)
 Acute respiratory failure 4 (7.84%)
 Septic shock 4 (7.84%)
 Epileptic condition 3 (5.88%)
 Guillain–Barré syndrome 3 (5.88%)
 Myasthenia gravis 2 (3.92%)
 Encephalitis 2 (3.92%)
 Haemorrhagic shock 2 (3.92%)
 Acute pancreatitis 2 (3.92%)
 Delirium tremens 1 (1.96%)
 Meningitis 1 (1.96%)
 Inhalation pneumopathy 1 (1.96%)
 Haemorrhagic stroke 1 (1.96%)
 Other 6 (11.76%)
SAPS II 46 [30–62]
SOFA score at ICU admission 6 [3–10]
Arterial blood gas values at ICU admission (n  =  30)
 pH 7.39 [7.27–7.45]
 PaCO2, mmHg 37.13 [28.50–43.50]
 PaO2, mmHg 101.38 [76–145.50]
 PaO2/FiO2 323 [233–479]
 SaO2, % 97.75 [95.25–99.15]
 CO2, mmol/L 24.50 [17.40–27.40]
SpO2/FiO2 at ICU admission 388 [278–457]
Arterial lactate, mmol L−1 2.10 [1.50–4.60]
  1. The data are median [25th–75th percentiles] or number (percentage)
  2. ICU intensive care unit; SAPSII Simplified Acute Physiology Score version II; SOFA score Sequential Organ Failure Assessment score