Journal of General Internal Medicine

, Volume 25, Issue 8, pp 853–858

Diabetes Mellitus, Glycemic Control, and Risk of Atrial Fibrillation

  • Sascha Dublin
  • Nicole L. Glazer
  • Nicholas L. Smith
  • Bruce M. Psaty
  • Thomas Lumley
  • Kerri L. Wiggins
  • Richard L. Page
  • Susan R. Heckbert
Original Research

Abstract

BACKGROUND

Diabetes may be an independent risk factor for atrial fibrillation. However, results from prior studies are in conflict, and no study has examined diabetes duration or glycemic control.

OBJECTIVE

To examine the association of diabetes with risk of atrial fibrillation and to describe risk according to diabetes duration and glycemic control.

DESIGN

A population-based case-control study.

PARTICIPANTS

Within a large, integrated healthcare delivery system, we identified 1,410 people with newly-recognized atrial fibrillation from ICD-9 codes and validated cases by review of medical records. 2,203 controls without atrial fibrillation were selected from enrollment lists, stratified on age, sex, hypertension, and calendar year.

MAIN MEASURES

Information on atrial fibrillation, diabetes and other characteristics came from medical records. Diabetes was defined based on physician diagnoses recorded in the medical record, and pharmacologically treated diabetes was defined as receiving antihyperglycemic medications. Information about hemoglobin A1c levels came from computerized laboratory data.

KEY RESULTS

Among people with atrial fibrillation, 252/1410 (17.9%) had pharmacologically treated diabetes compared to 311/2203 (14.1%) of controls. The adjusted OR for atrial fibrillation was 1.40 (95% CI 1.15-1.71) for people with treated diabetes compared to those without diabetes. Among those with treated diabetes, the risk of developing atrial fibrillation was 3% higher for each additional year of diabetes duration (95% CI 1-6%). Compared to people without diabetes, the adjusted OR for people with treated diabetes with average hemoglobin A1c ≤7 was 1.06 (95% CI 0.74-1.51); for A1c >7 but ≤8, 1.48 (1.09-2.01); for A1c >8 but ≤9, 1.46 (1.02-2.08); and for A1c >9, 1.96 (1.22–3.14).

CONCLUSIONS

Diabetes was associated with higher risk of developing atrial fibrillation, and risk was higher with longer duration of treated diabetes and worse glycemic control. Future research should identify and test approaches to reduce the risk of atrial fibrillation in people with diabetes.

KEY WORDS

arrhythmia atrial fibrillation diabetes mellitus glycemic control diabetes complications 

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Copyright information

© U.S. Government 2010

Authors and Affiliations

  • Sascha Dublin
    • 1
    • 2
  • Nicole L. Glazer
    • 3
  • Nicholas L. Smith
    • 2
    • 6
  • Bruce M. Psaty
    • 1
    • 2
    • 3
    • 4
  • Thomas Lumley
    • 5
  • Kerri L. Wiggins
    • 3
  • Richard L. Page
    • 7
  • Susan R. Heckbert
    • 1
    • 2
  1. 1.Group Health Research InstituteSeattleUSA
  2. 2.Department of EpidemiologyUniversity of WashingtonSeattleUSA
  3. 3.Department of MedicineUniversity of WashingtonSeattleUSA
  4. 4.Department of Health ServicesUniversity of WashingtonSeattleUSA
  5. 5.Department of BiostatisticsUniversity of WashingtonSeattleUSA
  6. 6.Seattle Epidemiology Research and Information CenterVA Puget Sound Health Care SystemSeattleUSA
  7. 7.Department of MedicineUniversity of Wisconsin School of Medicine and Public HealthMadisonUSA

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