Percentage of patients with pulmonary complications stratified by obstructive sleep apnea status in patients undergoing operation for pelvic/lower limb injury
| (–) Obstructive sleep apnea (%) | (+) Obstructive sleep apnea (%) | P value | |
| Ventilatory support | 3.1 | 5.3 | <0.001 |
| Respiratory failure | 2.6 | 7.7 | <0.001 |
| Pulmonary embolism | 0.7 | 1.2 | <0.001 |
| Acute respiratory distress syndrome | 2.4 | 4.2 | <0.001 |
| Ventilator-associated pneumonia | 0.8 | 1.0 | 0.007 |