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August 15, 2017; 89 (7) Article

Cardiovascular health in young adulthood and structural brain MRI in midlife

The CARDIA study

Michael P. Bancks, Norrina B. Allen, Prachi Dubey, Lenore J. Launer, Donald M. Lloyd-Jones, Jared P. Reis, Stephen Sidney, Yuichiro Yano, Pamela J. Schreiner
First published July 19, 2017, DOI: https://doi.org/10.1212/WNL.0000000000004222
Michael P. Bancks
From Northwestern University (M.P.B., N.B.A., D.M.L.-J.), Chicago, IL; Mount Sinai Medical Center Radiology (P.D.), Miami Beach, FL; National Institute on Aging (L.J.L.); National Heart, Lung, and Blood Institute (J.P.R.), Bethesda, MD; Kaiser Permanente Northern California (S.S.), Oakland; University of Mississippi Medical Center (Y.Y.), Jackson; and University of Minnesota (P.J.S.), Minneapolis.
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Norrina B. Allen
From Northwestern University (M.P.B., N.B.A., D.M.L.-J.), Chicago, IL; Mount Sinai Medical Center Radiology (P.D.), Miami Beach, FL; National Institute on Aging (L.J.L.); National Heart, Lung, and Blood Institute (J.P.R.), Bethesda, MD; Kaiser Permanente Northern California (S.S.), Oakland; University of Mississippi Medical Center (Y.Y.), Jackson; and University of Minnesota (P.J.S.), Minneapolis.
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Prachi Dubey
From Northwestern University (M.P.B., N.B.A., D.M.L.-J.), Chicago, IL; Mount Sinai Medical Center Radiology (P.D.), Miami Beach, FL; National Institute on Aging (L.J.L.); National Heart, Lung, and Blood Institute (J.P.R.), Bethesda, MD; Kaiser Permanente Northern California (S.S.), Oakland; University of Mississippi Medical Center (Y.Y.), Jackson; and University of Minnesota (P.J.S.), Minneapolis.
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Lenore J. Launer
From Northwestern University (M.P.B., N.B.A., D.M.L.-J.), Chicago, IL; Mount Sinai Medical Center Radiology (P.D.), Miami Beach, FL; National Institute on Aging (L.J.L.); National Heart, Lung, and Blood Institute (J.P.R.), Bethesda, MD; Kaiser Permanente Northern California (S.S.), Oakland; University of Mississippi Medical Center (Y.Y.), Jackson; and University of Minnesota (P.J.S.), Minneapolis.
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Donald M. Lloyd-Jones
From Northwestern University (M.P.B., N.B.A., D.M.L.-J.), Chicago, IL; Mount Sinai Medical Center Radiology (P.D.), Miami Beach, FL; National Institute on Aging (L.J.L.); National Heart, Lung, and Blood Institute (J.P.R.), Bethesda, MD; Kaiser Permanente Northern California (S.S.), Oakland; University of Mississippi Medical Center (Y.Y.), Jackson; and University of Minnesota (P.J.S.), Minneapolis.
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Jared P. Reis
From Northwestern University (M.P.B., N.B.A., D.M.L.-J.), Chicago, IL; Mount Sinai Medical Center Radiology (P.D.), Miami Beach, FL; National Institute on Aging (L.J.L.); National Heart, Lung, and Blood Institute (J.P.R.), Bethesda, MD; Kaiser Permanente Northern California (S.S.), Oakland; University of Mississippi Medical Center (Y.Y.), Jackson; and University of Minnesota (P.J.S.), Minneapolis.
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Stephen Sidney
From Northwestern University (M.P.B., N.B.A., D.M.L.-J.), Chicago, IL; Mount Sinai Medical Center Radiology (P.D.), Miami Beach, FL; National Institute on Aging (L.J.L.); National Heart, Lung, and Blood Institute (J.P.R.), Bethesda, MD; Kaiser Permanente Northern California (S.S.), Oakland; University of Mississippi Medical Center (Y.Y.), Jackson; and University of Minnesota (P.J.S.), Minneapolis.
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Yuichiro Yano
From Northwestern University (M.P.B., N.B.A., D.M.L.-J.), Chicago, IL; Mount Sinai Medical Center Radiology (P.D.), Miami Beach, FL; National Institute on Aging (L.J.L.); National Heart, Lung, and Blood Institute (J.P.R.), Bethesda, MD; Kaiser Permanente Northern California (S.S.), Oakland; University of Mississippi Medical Center (Y.Y.), Jackson; and University of Minnesota (P.J.S.), Minneapolis.
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Pamela J. Schreiner
From Northwestern University (M.P.B., N.B.A., D.M.L.-J.), Chicago, IL; Mount Sinai Medical Center Radiology (P.D.), Miami Beach, FL; National Institute on Aging (L.J.L.); National Heart, Lung, and Blood Institute (J.P.R.), Bethesda, MD; Kaiser Permanente Northern California (S.S.), Oakland; University of Mississippi Medical Center (Y.Y.), Jackson; and University of Minnesota (P.J.S.), Minneapolis.
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Citation
Cardiovascular health in young adulthood and structural brain MRI in midlife
The CARDIA study
Michael P. Bancks, Norrina B. Allen, Prachi Dubey, Lenore J. Launer, Donald M. Lloyd-Jones, Jared P. Reis, Stephen Sidney, Yuichiro Yano, Pamela J. Schreiner
Neurology Aug 2017, 89 (7) 680-686; DOI: 10.1212/WNL.0000000000004222

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Abstract

Objective: To examine the association between the American Heart Association (AHA) Life's Simple 7 (LS7) metric and brain structure.

Methods: We determined cardiovascular health (CVH) according to the AHA LS7, assigning 0, 1, or 2 points for meeting poor, intermediate, or ideal criteria for the 7 components (range 0–14) at baseline (aged 18–30 years in 1985–1986) and year 25 follow-up examination for 518 participants of the Coronary Artery Risk Development in Young Adults (CARDIA) brain MRI substudy. Visit-based CVH score and average score was assessed in relation to percent of intracranial volume of normal tissue of the whole brain, gray matter, and white matter, and abnormal tissue volume of white matter at year 25 using multivariable linear, logistic, and quantile regression, after adjustment for age, sex, race, field center, educational attainment, and alcohol consumption.

Results: Mean percentage of whole brain volume, normal gray matter, and normal white matter was 81.3% (±2.5), 42.9% (±2.0), and 38.4% (±2.0). Greater CVH score at baseline (per each additional point at year 0: 0.1%, 95% confidence limits 0.01–0.3; p < 0.05) and average CVH score were associated with greater percentage of whole brain volume (per each additional point in average score: 0.2%, 95% confidence limits 0.04–0.3; p < 0.05). Visit-based or average CVH score was not significantly associated with normal gray or white matter volume or abnormal white matter volume.

Conclusions: Maintaining ideal levels of cardiovascular health, determined by the LS7, in young adulthood is associated with greater whole brain volume in middle age but not regional differences in structure.

GLOSSARY

AHA=
American Heart Association;
AWM=
abnormal white matter;
BP=
blood pressure;
CARDIA=
Coronary Artery Risk Development in Young Adults;
CI=
confidence interval;
CL=
confidence limits;
CVH=
cardiovascular health;
EU=
exercise units;
GM=
gray matter;
LS7=
Life's Simple 7;
NWM=
normal white matter;
TICV=
total intracranial volume;
WBV=
whole brain volume;
WM=
white matter

Footnotes

  • Go to Neurology.org for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article.

  • Supplemental data at Neurology.org

  • Received December 12, 2016.
  • Accepted in final form May 26, 2017.
  • © 2017 American Academy of Neurology
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