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Circulation. 2013 Jul 16;128(3):217-24. doi: 10.1161/CIRCULATIONAHA.113.001614. Epub 2013 Jun 18.

Combined effects of child and adult elevated blood pressure on subclinical atherosclerosis: the International Childhood Cardiovascular Cohort Consortium.

Author information

1
Research Centre of Applied and Preventive Cardiovascular Medicine and the Departments of Clinical Physiology and Nuclear Medicine and Medicine, University of Turku and Turku University Hospital, Turku, Finland.
2
Menzies Research Institute Tasmania, University of Tasmania, Hobart, Australia.
3
Tulane Center for Cardiovascular Health, Tulane University, New Orleans, LA.
4
Department of Epidemiology, College of Public Health, and Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA.
5
Murdoch Childrens Research Institute, Melbourne, Australia.
6
The University of Melbourne, Department of Paediatrics at the Royal Children's Hospital, Melbourne, Australia.
7
Department of Pediatrics, University of Colorado Denver and Health Science Center, Aurora, CO.
8
Department of Clinical Physiology (MK), University of Tampere and Tampere University Hospital, Tampere, Finland.
9
Department of Pediatrics (LT), University of Oulu, Oulu, Finland; Vaasa Central Hospital Vaasa, Finland.
10
Department of Pediatrics (EU), Cincinnati Children's Hospital Medical Center and the University of Cincinnati, Cincinnati, OH.
#
Contributed equally

Abstract

BACKGROUND:

Elevated blood pressure (BP) levels in childhood have been associated with subsequent atherosclerosis. However, it is uncertain whether this risk is attenuated in individuals who acquire normal BP by adulthood. The present study examined the effect of child and adult BP levels on carotid artery intima-media thickness (IMT) in adulthood.

METHODS AND RESULTS:

The cohort consisted of 4210 participants from 4 prospective studies (mean follow-up, 23 years). Childhood elevated BP was defined according to the tables from the National High Blood Pressure Education Program. In adulthood, BP was classified as elevated for individuals with systolic BP ≥120 mm Hg, diastolic BP ≥80 mm Hg or with self-reported use of antihypertensive medications. Carotid artery IMT was measured in the left common carotid artery. High IMT was defined as an IMT ≥90th percentile according to age-, sex-, race-, and cohort-specific levels. Individuals with persistently elevated BP and individuals with normal childhood BP, but elevated adult BP had increased risk of high carotid artery IMT (relative risk [95% confidence interval]) 1.82[1.47-2.38] and 1.57[1.22-2.02], respectively) in comparison with individuals with normal child and adult BP. In contrast, individuals with elevated BP as children but not as adults did not have significantly increased risk (1.24[0.92-1.67]). In addition, these individuals had a lower risk of increased carotid artery IMT (0.66[0.50-0.88]) in compared with those with persistently elevated BP. The results were consistent when controlling for age, sex, and adiposity and when different BP definitions were applied.

CONCLUSIONS:

Individuals with persistently elevated BP from childhood to adulthood had increased risk of carotid atherosclerosis. This risk was reduced if elevated BP during childhood resolved by adulthood.

KEYWORDS:

atherosclerosis; blood pressure; epidemiology; hypertension; risk factors

PMID:
23780579
PMCID:
PMC3875837
DOI:
10.1161/CIRCULATIONAHA.113.001614
[Indexed for MEDLINE]
Free PMC Article

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