title: Early postoperative cognitive dysfunction is associated with higher cortisol levels in aged patients following hip fracture surgery.
abstract: This study aimed to evaluate the relationship between plasma cortisol levels and the occurrence of postoperative cognitive dysfunction (POCD) in aged patients following hip fracture surgery. A total of 175 patients, aged 65 years or older, who were scheduled for hip fracture surgery with spinal anesthesia were enrolled. Perioperative plasma levels of cortisol and neurocognitive tests were determined at 1 day preoperatively and 7 days postoperatively. Seventy-seven patients completed both blood sample collections and neurocognitive tests. POCD occurred in 29.9 % of patients at 7 days postoperatively. POCD patients presented significantly higher cortisol levels compared with non-POCD patients (P < 0.05). Furthermore, plasma cortisol levels were negatively correlated with mini-mental state examination (MMSE) scores at 7 days postoperatively (P < 0.0001). A specificity of 93 % and a sensitivity of 35 % were identified for the plasma cortisol measurement to discriminate POCD patients from non-POCD patients. The results suggest higher plasma cortisol levels are associated with POCD in aged patients following hip fracture surgery with spinal anesthesia.
authors.affiliation: Department of Anesthesiology, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China.
authors.forename: Mu-Huo
authors.initials: MH
authors.lastname: Ji
authors.forename: Jin-Chun
authors.initials: JC
authors.lastname: Shen
authors.forename: Rong
authors.initials: R
authors.lastname: Gao
authors.forename: Xiao-Yu
authors.initials: XY
authors.lastname: Liu
authors.forename: Hong-Mei
authors.initials: HM
authors.lastname: Yuan
authors.forename: Lin
authors.initials: L
authors.lastname: Dong
authors.forename: Jing
authors.initials: J
authors.lastname: Wu
authors.forename: Shan-Wu
authors.initials: SW
authors.lastname: Feng
authors.forename: Wei-Yan
authors.initials: WY
authors.lastname: Li
authors.forename: Jian-Jun
authors.initials: JJ
authors.lastname: Yang
mesh_terms: D000368:Aged; D000775:Anesthesia, Spinal / Q000379:methods; D003072:Cognition Disorders / Q000097:blood* / Q000523:psychology; D006620:Hip Fractures / Q000097:blood* / Q000523:psychology / Q000601:surgery*; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D009483:Neuropsychological Tests; D011183:Postoperative Complications / Q000097:blood; D011184:Postoperative Period
chemical_list: D006854:Hydrocortisone