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Table 6 NIV failure predictor factors

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

Clinical characteristics NIV failure (n = 8) NIV success (n = 7) P values
Age (years) 67.12 ± 8.64 70.71 ± 14.04 0.555
BMI (kg/m2) 46.54 ± 4.84 36.2 ± 5.07 0.014*
Neck circumference (cm) 45.12 ± 5.64 41.93 ± 1.97 0.179
Waist/Hip ratio 0.94 ± 0.08 0.97 ± 0.09 0.448
paCO2 at diagnosis (mm Hg) 57.12 ± 8.56 58.29 ± 6.97 0.780
Cardiovascular comorbidities 7 (87.5%) 6 (85.7%) 1
FVC (%) 68.07 ± 19.46 70.49 ± 13.48 0.788
AHI (n/h) 63.09 ± 28.53 42.54 21.76 0.145
RT < 90% (%) 26.45 ± 28.55 16.54 ± 18.89 0.450
Diagnosis during an exacerbation 6 (75%) 6 (85.7%) 0.605
  1. Data are expressed in n (%); mean (standard deviation)
  2. Definition of abbreviations: NIV non invasive ventilation, BMI body mass index, FVC forced vital capacity, AHI apnea hypopnea index, RT < 90% % of recording time below 90% saturation