Table 6.
NIV failure predictor factors
| 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 |
Data are expressed in n (%); mean (standard deviation)
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