In Reply Drs Santer and Eikermann highlight previous studies reporting improved postoperative outcomes in patients with OSA.1,2 The studies used the Nationwide Inpatient Sample, which did not screen all patients for OSA, and patients with undiagnosed OSA may have been misclassified as having no OSA. Given that 11.2% of patients presenting for major noncardiac surgery in our study had severe and unrecognized OSA,3 it would not be surprising that the risk of postoperative cardiovascular complications would be heavily influenced by the percentage of patients with undiagnosed OSA in the control group. Although preconditioning has been postulated to explain better postoperative outcomes in patients with OSA in previous studies, clinical trials on ischemic preconditioning have failed to reproduce the success observed in animal studies.4
Chan MTV, Chung F, for the Postoperative Vascular Complications in Unrecognized Obstructive Sleep Apnea (POSA) Study Investigators. Unrecognized Obstructive Sleep Apnea in Patients Undergoing Surgery—Reply. JAMA. 2019;322(12):1211–1212. doi:10.1001/jama.2019.10994
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: