JSM 2005 - Toronto

Abstract #304216

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Legend: = Applied Session, = Theme Session, = Presenter
Activity Number: 275
Type: Contributed
Date/Time: Tuesday, August 9, 2005 : 10:30 AM to 12:20 PM
Sponsor: Section on Statistics in Epidemiology
Abstract - #304216
Title: Simplifying Measurement of Cardiovascular Risk in Urban Jamaica: The Role of Multivariate Methods
Author(s): Tamika Royal*+ and Novie Younger and Terrence Forrester and Richard Cooper and Rainford Wilks
Companies: University of the West Indies and University of the West Indies and University of the West Indies and Loyola University Medical Center and University of the West Indies
Address: Tropical Medicine Research Institute, Mona, Kingston 7, Jamaica
Keywords: Factor analysis ; principal components analysis ; cardiovascular risk ; waist circumference ; hypertension
Abstract:

In developing countries, invasive methods of quantifying cardiovascular risk can prove costly, thus prohibitive to many. As such, we seek evidence that cheaper, less invasive methods will identify adequately cardiovascular risk in the face of the expense associated with more complex methods. Both factor and principal components analyses were used to derive each of two new variables, one from body composition and another from physiological measurements. Graphical representation of the factor and principal component scores separated persons with hypertension or high waist circumference from those without. The mean values of the factor scores for persons at risk also were further removed from zero than were the mean scores for risk-free individuals. The 95% confidence intervals for the mean scores for risk-free and at-risk persons did not overlap. These data support the hypothesis that waist circumference or hypertension status are valid markers of cardiovascular risk as estimated by composite measures, including several other indices, and may be effective screening tools.

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