Univariate analysis of risk factors related to mortality in OHS patients.

SaO2: oxygen saturation; NIV: non invasisve ventilation; CPAP: continuous positive airway pressure; EPAP: expiratory positive airway pressure; IPAP: inspiratory positive airway pressure; BIPAP: bilevel positive airway pressure; CVE: cardiovascular events; HF: heart failure. Univariate analysis of risk factors related to mortality in OHS patients.