Pulse lineResearch With Heart Logo

Risk Factors for Dementia in Patients With Atrial Fibrillation.

TitleRisk Factors for Dementia in Patients With Atrial Fibrillation.
Publication TypeJournal Article
Year of Publication2022
AuthorsAlam AB, Lutsey PL, Chen LY, Maclehose RF, Shao IY, Alonso A
JournalAm J Cardiol
Date Published2022 07 01
KeywordsAged, Atrial Fibrillation, Dementia, Female, Frailty, Humans, Incidence, Male, Medicare, Risk Factors, Stroke, United States

Although dementia and atrial fibrillation (AF) are common in older adults, risk factors for dementia have not been sufficiently characterized in patients with AF. We studied 621,773 patients with AF without dementia at the time of AF diagnosis who were enrolled in the MarketScan Commercial and Medicare Supplemental databases from 2007 to 2015. Dementia incidence and presence of predictors at the time of AF diagnosis (cardiometabolic conditions, mental and neurologic disorders, and other chronic conditions) were based on International Classification of Diseases, Ninth Revision, Clinical Modification codes in outpatient and inpatient claims, whereas medication usage was based on outpatient pharmacy claims. A frailty score was calculated using a previously established algorithm. The associations between the predictors of interest and dementia were assessed with multivariable Cox models. Patients had a mean age of 68 years (SD 14 years) and 41% were women. During a mean follow-up of 2.0 years, there were 16,073 cases of dementia. The strongest predictors of dementia were frailty (hazard ratio [HR] 1.43, 95% confidence interval [CI] 1.40 to 1.45, per 1-SD increase in the score), cognitive impairment (HR 1.50, 95% CI 1.36 to 1.65), mood disorders (HR 1.49, 95% CI 1.32 to 1.70), schizophrenia (HR 1.86, 95% CI 1.75 to 1.98), and substance abuse (HR 1.58, 95% CI 1.39 to 1.80). Among cardiometabolic conditions, only stroke (HR 1.17, 95% CI 1.13 to 1.22) and diabetes mellitus (HR 1.14, 95% CI 1.11 to 1.18) were associated with small increases in dementia risk after adjusting for demographics, frailty, co-morbidities, and medications. We have identified several risk factors for dementia in patients with AF.

Alternate JournalAm J Cardiol
PubMed ID35473779
PubMed Central IDPMC9181692
Grant ListP30 AG066511 / AG / NIA NIH HHS / United States
R21 AG058445 / AG / NIA NIH HHS / United States
16EIA26410001 / AHA / American Heart Association-American Stroke Association / United States
K24 HL159246 / HL / NHLBI NIH HHS / United States
K24 HL148521 / HL / NHLBI NIH HHS / United States
R01 HL122200 / HL / NHLBI NIH HHS / United States