Obstructive sleep apnea (OSA) and postoperative delirium occur commonly and are the focus of many clinical recommendations and ongoing research. In this issue and on the cover we highlight an unexpected and large risk of postoperative delirium in patients with OSA.

  • Bateman and Eikermann: Obstructive Sleep Apnea Predicts Adverse Perioperative Outcome: Evidence for an Association between Obstructive Sleep Apnea and Delirium, p. 753

  • Flink et al. : Obstructive Sleep Apnea and Incidence of Postoperative Delirium after Elective Knee Replacement in the Nondemented Elderly, p. 788