Fig. 1. The rate of perioperative acute ischemic stroke by surgery and patient age group. The rate of perioperative acute ischemic stroke is shown with 95% confidence intervals for each patient group. Figures for the 85 yr-old and older age group cannot be shown for the lobectomy/segmental resection group as it contains less than 10 patients, in accordance with the rules governing the use of the Nationwide Inpatient Sample dataset. Reprinted with permission from Bateman BT, et al. Anesthesiology 2009; 110:231–8.