Performance of Novel Bed Side Scores as Predictors of Hospital Outcome in Acute Exacerbation of Chronic Obstructive Pulmonary Disease Among Women; Cohort Study

Inclusion Criteria: * Patients with AECOPD leading to hypoxemia, hypercapnia and respiratory acidosis with pH \< 7.35 and PaCO2 \> 45 mm of Hg will be admitted to the respiratory intensive care unit (ICU) for NIV or the ward will be eligible for inclusion and not in need for mechanical ventilation Exclusion Criteria: * Requirement for emergency intubation. * Other contraindications to NIPPV including cardiac or respiratory arrest; nonrespiratory organ failure (eg, severe encephalopathy, severe gastrointestinal bleeding, hemodynamic instability with or without unstable cardiac angina); facial surgery or trauma; upper-airway obstruction; inability to protect the airway and/or high risk of aspiration; and inability to clear secretions.(6) * Age \< 35 years.