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Table 1 Baseline characteristics

From: Switch of noninvasive ventilation (NIV) to continuous positive airway pressure (CPAP) in patients with obesity hypoventilation syndrome: a pilot study

Baseline characteristics n = 15
Sex (male) 5 (33.3%)
Age (years) 68.8 ± 11.2
BMI (kg/m2) 41.7 ± 7.16
Neck circumference (cm) 43.6 ± 4.5
Waist/Hip ratio 0.95 ± 0.08
pH on ABG before initiating NIV 7.38 ± 0.06
paCO2 on ABG before initiating NIV (mmHg) 57.7 ± 7.6
paO2 on ABG before initiating NIV (mmHg) 62.6 ± 18.8
HCO3- before initiating NIV (mmol/L) 31.8 ± 5.1
Actual or past smokers 7 (46.7%)
Pack per year 38.1 ± 30.9
Cardiovascular comorbidities 13 (86.7%)
Hypertension 12 (80%)
Dyslipidemia 12 (80%)
Diabetes 9 (60%)
Cardiac disease 12 (80%)
Ischemic cardiac disease 5 (33.3%)
Cardiac arrhythmia 5 (33.3%)
LVEF (%) 56 ± 14.3
Diastolic dysfunction 8 (61.5%)
Diagnosis made during an exacerbation 12 (80%)
  1. Data are expressed in n (%) and mean ± standard deviation
  2. Definition of abbreviations: BMI body mass index, ABG arterial blood gas, NIV non invasive ventilation, LVEF left ventricular ejection fraction