on October 28, 2004
Published online before print October 28, 2004, doi: 10.1161/01.STR.0000147719.27237.14
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Submitted on May 17, 2004
From the Section of Cardiovascular Medicine, University of Wisconsin Medical School (J.H.S., P.S.D.), Madison, Wis; Tulane Center for Cardiovascular Health and Department of Epidemiology (S.R.S., S.L., W.C., G.S.B.), Tulane University Health Sciences Center, New Orleans, La; Division of Vascular Ultrasound Research (M.G.B., R.T.), Wake Forest University School of Medicine, Winston-Salem, NC. * To whom correspondence should be addressed. E-mail: jhs{at}medicine.wisc.edu.
Background and Purpose--Reference values and age-related changes of carotid intima-media thickness (CIMT) have not been described in a community-based sample of young asymptomatic adults. CIMT measurements from the Bogalusa Heart Study, a study of the natural history of atherosclerosis in young adults and children, were used to characterize age-, race-, and sex-specific CIMT distributions and yearly rates of change. Methods and Results--Age-, sex-, and race-specific CIMT percentile values and cross-sectional changes with age were estimated using B-mode carotid ultrasound images from 519 young adults (mean age 32 years, 61% female, 29% black). Nomograms of CIMT percentiles between the ages of 25 and 40 years are provided in 5-year increments. CIMT was thickest in the carotid bulb and increased linearly with age, most rapidly in the bulb. With age, composite CIMT increased most slowly in white females and most rapidly in white males. Sample size estimates projected that 268 to 462 subjects are needed to detect CIMT changes Conclusions--These estimated CIMT distributions and percentiles can serve as reference values for assessment of subclinical atherosclerosis in young adults. The observed age-related differences in CIMT can be used to plan epidemiological and clinical trials investigating atherosclerosis and anti-atherosclerotic interventions.
Revised on August 31, 2004
Accepted on September 13, 2004
Distribution and Cross-Sectional Age-Related Increases of Carotid Artery Intima-Media Thickness in Young Adults. The Bogalusa Heart Study
James H. Stein MD*;
0.010 mm/year.
Key words: aging • atherosclerosis • cardiovascular diseases • carotid arteries
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