Association of Autoimmune Disorders and Disease-modifying Antirheumatic Drugs with the Risk of Alzheimer's and/or Dementia: A Population Study Using Medicare Beneficiary Data.

This study provides evidence of an association between RA and increased risk of AD and/or dementia. The findings suggest that DMARD use may have a protective effect against the development of AD and/or dementia in patients with an autoimmune disorder.