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Table 1 Demographic and clinical features of the sample

From: Predictor factors for non-invasive mechanical ventilation failure in severe COVID-19 patients in the intensive care unit: a single-center retrospective study

Main characteristics of the population (82 patients)
Demographic data
Variable Result
Sex, male (%) 62 (75.6%)
Age (years) 67.0 [56.5–73.0]
BMI (kg/m2) 27.8 [25.3–31.3]
NIV-day 5.0 [3.0–8.5]
Ward LOS (days) 3.0 [0.0–7.0]
ICU LOS (days) 8.0 [5.0–12.0]
Survived (%) 37 (45.1%)
Comorbidities
Variable Result
Charlson Comorbidity Index 3 [1–4]
Hypertension (%) 45 (54.9%)
Obesity (%) 27 (32.9%)
Diabets (%) 22 (26.8%)
COPD (%) 15 (18.3%)
CAD (%) 10 (12.2%)
CKD (%) 4 (4.9%)
Endocrinological disease (%) 4 (4.9%)
Atrial fibrillation (%) 4 (4.9%)
DVT (%) 3 (3.7%)
CVD (%) 3 (3.7%)
Asthma (%) 3 (3.7%)
Autoimmune disease (%) 3 (3.7%)
Hematological disease (%) 2 (2.4%)
OSAS (%) 2 (2.4%)
Neurological disorder (%) 2 (2.4%)
Liver disease (%) 1 (1.2%)
Arterial blood gas analysis and ventilation parameters
Variable Result
pH 7.46 [7.43–7.48]
PaO2(mmHg) 89.5 [75.0–106.2]
PaCO2(mmHg) 37.5 [33.0–42.0]
PaO2/FiO2 125.0 [98.5–177.7]
Lactate (mmol/L) 1.3 [1.1–1.8]
CPAP (%) 13 (15.9%)
PSV (%) 69 (84.1%)
PEEP (cmH2O) 10 [10–10]
Pressure support (cmH2O) 7.5 [6.0–10.0]
  1. The table reports demographic and clinical features. Frequencies are expressed as numbers and percentages (%). Continuous variables are expressed as mean ± standard deviation (SD) or median, first and third quartile [q1q3]. BMI, body mass index; LOS, length of stay; CAD, coronary artery disease; DVT, deep vein thrombosis; CVD, cerebral-vascular disease; CKD, chronic kidney disease; COPD, chronic obstructive pulmonary disease; OSAS, obstructive sleep apnea syndrome; CPAP, continuous positive airway pressure; PSV, pressure support ventilation; PEEP, positive end-expiratory pressure