Cardiovascular Risk Factors Are Associated With Increased Arterial Stiffness in Youth With Type 1 Diabetes

The SEARCH CVD study

  1. Richard F. Hamman, MD, DRPH1
  1. 1Colorado School of Public Health, Aurora, Colorado
  2. 2Wake Forest School of Medicine, Winston-Salem, North Carolina
  3. 3Barbara Davis Center for Childhood Diabetes, Aurora, Colorado
  4. 4Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
  5. 5Cincinnati Children’s Hospital, Cincinnati, Ohio
  6. 6Northwest Lipids Laboratories, University of Washington, Seattle, Washington
  1. Corresponding author: Dana Dabelea, dana.dabelea{at}ucdenver.edu.

Abstract

OBJECTIVE To evaluate if presence of cardiovascular (CV) risk factors and their clustering as metabolic syndrome (MetS) is associated with increased arterial stiffness and accelerated progression over time among youth with type 1 diabetes.

RESEARCH DESIGN AND METHODS Longitudinal study of 298 youth with type 1 diabetes (age 14.5 years; 46.3% female; duration 4.8 years), with two research visits conducted 5 years apart. CV factors included: waist circumference, blood pressure (BP), fasting lipids (HDL cholesterol, LDL cholesterol [LDL-c], triglycerides), albumin/creatinine ratio, and HbA1c. MetS was based on Adult Treatment Panel III criteria modified for youth. Pulse wave velocity (PWV) in the carotid–femoral segment was measured by tonometry. Mixed models were used to assess the rate of progression in PWV and the association between CV factors and PWV over time.

RESULTS PWV increased significantly over time (0.145 m/s/year; P < 0.0001). MetS (P = 0.0035), large waist (P < 0.0001), and elevated BP (P = 0.0003) at baseline were each associated with worse PWV over time. These baseline factors, however, did not significantly influence the rate of progression. Increases in waist circumference (P < 0.0001), LDL-c levels (P = 0.0156), and declining glucose control (HbA1c; P = 0.0419) were independently associated with higher PWV over time.

CONCLUSIONS Presence, clustering, and worsening of CV risk factors are associated with increased arterial stiffness over time in youth with type 1 diabetes. Whether improvement in CV risk factors early in life will slow the progression of arterial stiffness and reduce the burden of CV disease in this population requires further study.

Footnotes

  • Received April 10, 2013.
  • Accepted July 3, 2013.

Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered. See http://creativecommons.org/licenses/by-nc-nd/3.0/ for details.

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  1. Diabetes Care vol. 36 no. 12 3938-3943
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