Implementing a bedside assessment of respiratory mechanics in patients with acute respiratory distress syndrome

Table 1 Characteristics of the patients (N = 61)

Characteristic	Value
Male sex, n (%)	48 (78.7)
Age, years	56 [45–68]
Predicted body weight^a, kg	68 ± 11
Body mass index, kg/m²	29 ± 7
APACHE II score at admission^b	28 ± 10
SOFA score at inclusion^c	12 ± 4
Days of NIV prior to intubation, n	0 [0–1]
Days of IMV at inclusion^d, n	2 [1–6]
Days of ARDS at inclusion^d, n	0 [0–1]
Risk factors of ARDS^e, n (%)
Pneumonia	32 (52.5)
Extrapulmonary sepsis	9 (14.8)
Trauma	9 (14.8)
Noncardiogenic shock	7 (11.5)
Pancreatitis	5 (8.2)
Aspiration	4 (6.6)
Pulmonary contusion	3 (4.9)
Pulmonary vasculitis	2 (3.3)
Drug overdose	2 (3.3)
Blood transfusion	1 (1.6)
No risk factor	4 (6.6)
Severity of ARDS, n (%)
Mild	9 (14.8)
Moderate	39 (63.9)
Severe	13 (21.3)
Patients treated with ECMO	3 (4.9)
Patients with tracheostomy	9 (14.8)
Days of IMV after inclusion, n	9 [4–20]
Duration of IMV, days	12 [7–24]

Abbreviations: APACHE Acute Physiology and Chronic Health Evaluation, ARDS Acute respiratory distress syndrome, ECMO Extracorporeal membrane oxygenation, IMV Invasive mechanical ventilation, NIV Noninvasive ventilation, SOFA Sepsis-related Organ Failure Assessment
Dichotomous or nominal categorical variables are described in number (percent); continuous variables are described as mean ± SD or median [IQR], as appropriate
^aPredicted body weight of male patients was calculated as 50 + 0.91 × (centimeters of height − 152.4) and that of female patients as 45.5 + 0.91 × (centimeters of height − 152.4)
^bAPACHE II score at intensive care unit admission
^cSOFA score at day of patient assessment (i.e., the day the patient was measured)
^dThe days receiving IMV before inclusion and the days of ARDS identification before inclusion, respectively
^ePatients can have more than one risk factor. The sum of the percent is hence >100%