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Table 1 Baseline patient and healthy subject characteristics

From: Real-time shear wave ultrasound elastography: a new tool for the evaluation of diaphragm and limb muscle stiffness in critically ill patients

CharacteristicsHealthy subjects (n = 31)Critically ill patients (n = 12)
Clinical characteristics
 Age (years)26.7 ± 4.666.6 ± 20.9
 Gender (male)17 (54.8)7 (58)
 Body mass index (kg/m2)22.6 [19.9–26.3]25.2 [15.5–32.8]
 SAPS II59.1 ± 25.4
 SOFA at admission8.1 ± 6.2
Primary reason for admission 
 Respiratory distress 7 (57)
 Coma 2 (17)
 Sepsis 2 (17)
 Acute kidney injury 1 (8)
Clinical management during the first week in ICU 
 Use of continuous neuromuscular blockade infusion 5 (42)
 Use of systemic steroids 5 (42)
 Duration of sedation (days) 4 [2–7]
 Duration of invasive mechanical ventilation (days) 5.8 [3.7–7]
 Duration of controlled mechanical ventilation (days) 1.7 [0.9–7]
 Cumulative fluid balance at day 3 (ml) 6740 ± 2828
  1. Abbreviations: ICU intensive care unit, RASS Richmond Agitation Sedation Scale, SAPS II Severe Acute Physiology Score II, SOFA Sepsis-related Organ Failure Assessment, IQR interquartile range, SD standard deviation
  2. *All data are presented as either n (%) for categorical variables or median [IQR] and mean (SD) for continuous variables. Healthy subjects were younger than critically ill patients (p < 0.05)