Clinical trial NCT00049920: The ARIC MRI Study
Official title: The ARIC Neurocognitive Longitudinal Study
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Cardiovascular Diseases
Cerebrovascular Disorders
Cerebrovascular Accident
Lead sponsor: National Heart, Lung, and Blood Institute (NHLBI)
Sponsor class: NIH
First posted: 2002-11-15
Enrollment: 1134
Sex: ALL
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Participants in the ARIC Neurocognitive Longitudinal Study were recruited for a follow-up brain MR scan and cognitive testing from the subset of the (parent) ARIC cohort that had an initial MR scan at the third (Visit 3) ARIC examination. Participants included black and white men and women.

Brief summary: To perform a follow-up study of cerebrovascular disease in the Atherosclerosis Risk in Communities (ARIC) magnetic resonance imaging subcohort.

Detailed description: BACKGROUND:

Although the clinical manifestations of cerebrovascular disease (CVD) typically appear acutely, the deleterious effects of CVD on brain structure and function likely begin in a presymptomatic fashion at a younger age than clinical strokes. In an effort to characterize the prevalence, risk factors, and cognitive correlates of subclinical CVD, the Atherosclerosis Risk in Communities (ARIC) Study funded by the National Heart, Lung, and Blood Institute performed cerebral magnetic resonance imaging (MRI) and cognitive assessments on a large, bi-racial sample of middle-aged and young-elderly adults. Results from the ARIC MRI baseline study revealed a remarkably high prevalence of subclinical CVD including silent cerebral infarctions, white matter hyperintensities, and brain atrophy. Moreover, these subclinical abnormalities were found to be associated with reduced cognitive functioning and with clinical CVD outcomes such as incident stroke. Surprisingly little is known about risk factors related to the incidence or progression of subclinical CVD or how progression of these markers may relate to clinical outcomes such as stroke or neurocognitive decline.

DESIGN NARRATIVE:

This is a follow-up study of the ARIC MRI cohort, with repeated semiquantitative MR imaging and cognitive assessments. The study will also take advantage of recent advances in MR imaging and obtain volumetric measurements of selected brain regions and expand upon the baseline cognitive assessment to further characterize neurocognitive functioning. The longitudinal design of the proposed study will fill salient gaps in current understanding of subclinical CVD. Moreover, conducting this study within ARIC takes advantage of ARIC's baseline MRI data, unique African American population, and extensive vascular risk factor data (including new genetic and biochemical factors as well as subclinical markers of both large and small vessel disease), making an efficient study to provide new insights into the incidence, progression, and outcomes associated with subclinical CVD.

Eligibility criteria: Participated in the baseline ARIC MRI study.

Primary outcomes:
Secondary outcomes:
Other outcomes:
Locations:
Study officials:
affiliation: University of Mississippi Medical Center
name: Thomas H Mosley, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Knopman DS, Mosley TH, Catellier DJ, Sharrett AR; Atherosclerosis Risk in Communities (ARIC) Study. Cardiovascular risk factors and cerebral atrophy in a middle-aged cohort. Neurology. 2005 Sep 27;65(6):876-81. doi: 10.1212/01.wnl.0000176074.09733.a8.