title: Type 2 diabetes and antidiabetic medications in relation to dementia diagnosis.
abstract: BACKGROUND
  Type 2 diabetes (T2D) has been shown to increase dementia risk, but few studies evaluated the relationship between antidiabetic treatment and dementia.
  
  
  METHODS
  We followed up 67,731 participants who were nondemented, nondiabetic, aged 65 or over at baseline from January 2004 to December 2009, to observe the onset of T2D (median follow-up 2.4 years), and to compare the risk of the development of dementia associated with particular types of antidiabetic medication among participants with T2D who had solely one type of antidiabetic agents throughout the follow-up period (median follow-up for participants with T2D 3.1 years).
  
  
  RESULTS
  The hazard ratio for dementia diagnosis in the new-onset T2D participants compared with the non-T2D participants was 1.56 (95%CI: 1.39-2.18). The relative rate of dementia was 5.31 (95% CI: 1.89-14.96) for participants taking thiazolidinediones (n = 28) and 1.22 (95% CI: 0.78-1.91) for those taking sulfonylureas (n = 796) compared to those taking metformin (n = 1,033). The risk of dementia was higher in ever (n = 841) versus never users (n = 4,579) of thiazolidinediones: 1.44 (95% CI: 1.12-1.86).
  
  
  CONCLUSIONS
  Diabetes is associated with an increased risk of dementia. The risk effect becomes weaker provided that participants take sulfonylureas or metformin rather than thiazolidinediones for a longer period.
authors.affiliation: Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK. Department of Psychiatry and.
authors.forename: Chin
authors.initials: C
authors.lastname: Cheng
authors.affiliation: Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan.
authors.forename: Ching-Heng
authors.initials: CH
authors.lastname: Lin
authors.affiliation: Institute of Population Health Sciences, National Health Research Institutes, Miaoli, Taiwan. Institute of Health and Welfare Policy, National Yang-Ming University, Taipei, Taiwan.
authors.forename: Yi-Wen
authors.initials: YW
authors.lastname: Tsai
authors.affiliation: Department of Psychiatry, Changhua Christian Hospital, Changhua, Taiwan.
authors.forename: Chia-Jui
authors.initials: CJ
authors.lastname: Tsai
authors.affiliation: Department of Psychiatry and Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
authors.forename: Po-Han
authors.initials: PH
authors.lastname: Chou
authors.affiliation: Department of Psychiatry and Department of Psychiatry, National Yang-Ming University, Taipei, Taiwan. Center for Neuropsychiatric research, National Health Research Institutes, Miaoli, Taiwan. thlan@ym.edu.tw.
authors.forename: Tsuo-Hung
authors.initials: TH
authors.lastname: Lan
mesh_terms: D000368:Aged; D003704:Dementia / Q000139:chemically induced*; D003924:Diabetes Mellitus, Type 2 / Q000175:diagnosis / Q000188:drug therapy*; D005260:Female; D006801:Humans; D007004:Hypoglycemic Agents / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D016016:Proportional Hazards Models
chemical_list: D007004:Hypoglycemic Agents
keywords: Alzheimers; Cognition.; Diabetes; Drug related; Medication; Risk factors