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Using MRI to Assess Aortic Wall Thickness in the Multiethnic Study of Atherosclerosis: Distribution by Race, Sex, and Age

Arthur E. Li1, Ihab Kamel1, Felice Rando2, Melissa Anderson2, Basak Kumbasar1, João A. C. Lima3 and David A. Bluemke1

1 Department of Radiology, Johns Hopkins University School of Medicine, MRI Rm. 143, Baltimore, MD 21287.
2 Department of Epidemiology, University of Washington, Seattle, WA.
3 Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287.



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Fig. 1. Scatterplot shows average wall thickness (in millimeters) as measured by observer 1 plotted against measurements by observer 2. Subset of 100 subjects was used for analysis. Note excellent agreement between two observers.

 


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Fig. 2. Scatterplot shows maximal wall thickness (in millimeters) as measured by observer 1 plotted against measurements by observer 2. Subset of 100 subjects was used for analysis. Note excellent interobserver agreement between two observers.

 


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Fig. 3. Scatterplot shows average wall thickness (in millimeters) for 196 subjects plotted against age. Line fitted by linear regression is also plotted. Note that average aortic wall thickness increases with age. Five-year increase in age is associated with 0.07-mm increase in average wall thickness.

 


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Fig. 4. Scatterplot shows maximal wall thickness (in millimeters) for 196 subjects plotted against age. Line fitted by linear regression is also plotted. Note that maximal wall thickness increases with age. Five-year increase in age is associated with 0.10-mm increase in maximal wall thickness.

 

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