Analysis of risk factors between subgroups
Two studies did not identify the severity of OSA as a risk factor for complications (10, 11), however one study did report that patients with an AHI ≥ 22 and a BMI ≥ 30 were more likely to require oxygen in PACU (14). A few studies have reported severe OSA among patients who had desaturations but due to the small numbers, no statistical analyses were performed (7, 8, 12). Patients who had post-PACU complications also had a higher incidence of co-morbid illness (p=0.03) and multiple comorbidities (p=0.02) (14). One study identified that patients who had concurrent nasal and palatopharyngeal surgery were more likely to be admitted (p=0.02) (12).