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Table 1 Main characteristics of the studied healthy volunteers and critically ill COVID-19 patients at inclusion

From: Peripheral microcirculatory alterations are associated with the severity of acute respiratory distress syndrome in COVID-19 patients admitted to intermediate respiratory and intensive care units

 

Healthy volunteers (n = 32)

COVID-19 patients

(n = 73)

Age (years)

34 ± 10

59 ± 13*

Gender (male), n (%)

16 (50)

51 (70)*

BMI

23 ± 3

30 ± 5*

Days from hospitalization (n)

5 ± 4

Days from IRCU/ICU admission (n)

3 ± 3

APACHE II score

14 ± 8

Pre-existing comorbidities (n, %)

  

Hypertension

33 (45)

Diabetes mellitus

17 (23)

Smoker

18 (25)

COPD

7 (10)

Temperature (°C)

36.3 ± 0.3

36.0 ± 0.7

HR (beats/min)

75 ± 13

77 ± 16

MAP (mmHg)

83 ± 9

86 ± 12

RR (resp/min)

18 ± 3

22 ± 5*

SpO2 (%)

97 ± 2

95 ± 4

FiO2 (%)

21 ± 0

54 ± 21*

StO2 (%)

65 ± 3

67 ± 6

THC (μM/L)

45 ± 11

43 ± 16

DeO2 (%/min)

− 9.1 ± 2.4

− 5.2 ± 2.0*

ReO2 (%/min)

120 ± 55

77 ± 37*

Hyperemia AUC (U)

14.8 ± 6.8

8.5 ± 5.0*

  1. BMI, body mass index; IRCU, Intermediate Respiratory Care Unit; ICU, Intensive Care Unit; COPD, chronic obstructive pulmonary disease; HR, heart rate; MAP, mean arterial pressure; RR, respiratory rate; SpO2, pulse-oximetric oxygen saturation; FiO2, fraction of inspired oxygen; StO2, tissue oxygen saturation; THC, tissue hemoglobin concentration; DeO2, deoxygenation rate; ReO2, reoxygenation rate; AUC, area under the curve
  2. *p < 0.05