title: Association of cognitive dysfunction with hippocampal atrophy in elderly Japanese people with type 2 diabetes.
abstract: This study aimed to examine the associations of cognitive function with hippocampal and whole brain atrophies, age, education, and diabetes-related parameters in patients with type 2 diabetes. Sixty-one patients over 65 years of age with type 2 diabetes and 53 age- and sex-matched non-diabetic controls were enrolled. Hippocampal and whole brain atrophies were assessed by quantifying hippocampal and brain volumes by brain magnetic resonance imaging. Cognitive function was evaluated by Mini-Mental State Examination (MMSE) and the Revised Hasegawa Dementia Scale (HDS-R). Compared with the non-diabetic group, patients with type 2 diabetes showed significant increases in hippocampal and whole brain atrophies. The MMSE and HDS-R scores in type 2 diabetic patients showed significant negative correlations with age and significant positive correlations with years of education. These scores were also significantly negatively correlated with hippocampal atrophy, but not whole brain atrophy. Hippocampal atrophy in diabetic patients did not, however, correlate with age, years of education, or diabetes-related parameters. We showed hippocampal and whole brain atrophies to be more frequent in elderly patients with type 2 diabetes than in non-diabetic controls. Their cognitive functions were significantly and negatively associated with hippocampal atrophy.
authors.affiliation: Endocrinology and Metabolism Division, Department of Internal Medicine 1, Shimane University Faculty of Medicine, Shimane, Japan.
authors.forename: Kumi
authors.initials: K
authors.lastname: Hayashi
authors.forename: Soichi
authors.initials: S
authors.lastname: Kurioka
authors.forename: Toru
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Miwa
authors.initials: M
authors.lastname: Morita
authors.forename: Ippei
authors.initials: I
authors.lastname: Kanazawa
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Takase
authors.forename: Akihiko
authors.initials: A
authors.lastname: Wada
authors.forename: Hajime
authors.initials: H
authors.lastname: Kitagaki
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nagai
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Bokura
authors.forename: Shuhei
authors.initials: S
authors.lastname: Yamaguchi
authors.forename: Toshitsugu
authors.initials: T
authors.lastname: Sugimoto
mesh_terms: D000367:Age Factors; D000368:Aged; D000375:Aging; D044466:Asian People; D001284:Atrophy; D016022:Case-Control Studies; D003071:Cognition; D003072:Cognition Disorders / Q000175:diagnosis / Q000453:epidemiology* / Q000503:physiopathology; D048909:Diabetes Complications / Q000175:diagnosis / Q000453:epidemiology* / Q000503:physiopathology; D003924:Diabetes Mellitus, Type 2 / Q000175:diagnosis / Q000453:epidemiology*; D004522:Educational Status; D005260:Female; D006624:Hippocampus / Q000473:pathology*; D006801:Humans; D007564:Japan / Q000453:epidemiology; D016014:Linear Models; D008279:Magnetic Resonance Imaging; D008297:Male; D009483:Neuropsychological Tests; D011237:Predictive Value of Tests