RESULTS	Plasma IL-6 concentrations ( 51.7 + / - 22.0 and 31.4 + / - 8.2 pg mL ( -1 ) ) in patients with postoperative confusion at the end of surgery and 24 hours after surgery were significantly higher than those levels ( 34.4 + / - 16.2 and 16.9 + / - 7.7 pg mL ( -1 ) ) in patients without postoperative confusion .\