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Published on: July 24, 2013
Vascular age calculation and equivalent risk factors in HIV-infected patients obtained from the D:A:D risk equation
Jose I Cuende1, Adriana Saltijeral2, Vicente Estrada3
1Internal Medicine Department, Complejo Asistencial Universitario de Palencia, Spain.
Insights
Vascular age, a measure of cardiovascular system health, can now be calculated for HIV patients using the D:A:D equation. This tool aids in understanding and managing cardiovascular risk in this population.
Area of Science:
- Cardiovascular Health
- HIV Medicine
- Risk Assessment
Background:
- Vascular age estimates cardiovascular system health.
- The Data Collection on Adverse Effects of Anti-HIV Drugs (D:A:D) Study created a cardiovascular risk equation for HIV-infected patients.
- This equation incorporates antiretroviral therapy and traditional cardiovascular risk factors.
Purpose of the Study:
- To determine vascular age in HIV-infected patients using the D:A:D equation.
- To apply a novel cardiovascular risk assessment tool to a specific patient population.
Main Methods:
- Vascular age was calculated using the established D:A:D equation.
- The Poisson regression model, an exponential model, was employed.
- This model matches patient risk factors to those of a controlled subject.
Main Results:
- An equation for calculating vascular age in patients was derived.
- A table for simplified vascular age calculation was created.
- A table of cardiovascular risk equivalents was developed.
Conclusions:
- Vascular age, derived from Framingham risk tables, can be calculated using scales like D:A:D for HIV patients.
- Calculating vascular age in HIV patients may improve communication of cardiovascular risk.
- This method could enhance the management of modifiable cardiovascular risk factors in HIV patients.
Background:
Vascular age is a concept that represents the hypothetical age of the cardiovascular system and might be an alternative way of expressing the cardiovascular risk of a patient. The Data Collection on Adverse Effects of Anti-HIV Drugs Study (D:A:D) developed a cardiovascular risk equation from a population of HIV-infected patients, incorporating exposure to individual antiretroviral therapy drugs and traditional classic cardiovascular risk factors.
Objectives:
The aim of this study was to determine the vascular age calculated from the D:A:D equation, for HIV infected patients.
Methods:
Vascular age was calculated according to its definition by using the D:A:D equation. The Poisson regression model used in the D:A:D equation is an exponential model to calculate the vascular age to match the exponent of the equation with the factors of a patient with the exponent of a subject with controlled risk factors.
Results:
We obtained an equation that allows calculating the vascular age of a patient considering cardiovascular risk factors listed in the same D:A:D equation. From the equation, we have built a table for easy calculation of the vascular age and a table of cardiovascular risk equivalents.
Conclusions:
Vascular age is a new concept derived from Framingham risk tables that can be calculated with other risk scales, such as D:A:D for HIV patients. The calculation of vascular age in HIV patients could be a useful tool for communicating cardiovascular risk and to improve the control of modifiable risk factors.
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