From: Risk of postoperative hypoxemia in ambulatory orthopedic surgery patients with diagnosis of obstructive sleep apnea: a retrospective observational study
Number of risk factors
Risk factors combinations
Incidence of hypoxemia
(% and number of pts)
Odds
0
None
22% (20)
0.35
1
COPD
33% (1)
0.5
Upper extremity procedure
41% (43)
0.71
2
COPD + Upper extremity procedure
78% (7)
2.59