Faculty members at the UM School of Medicine have created a cutting-edge tool that enables the early identification and assessment of risks in vulnerable patients.
Heart disease, being the leading cause of death globally, has prompted scientists to investigate the compounded effects of multiple risk factors such as hypertension, obesity, and high cholesterol on an individual's likelihood of suffering from a heart attack or stroke. Utilizing advanced modeling techniques, researchers from the University of Maryland School of Medicine (UMSOM) have created a novel tool capable of predicting heart disease risk in individuals aged over 40 based on their lifelong exposure to these risk factors.
Their groundbreaking research, recently published in the Journal of the American College of Cardiology, leveraged data from the Coronary Artery Risk Development in Young Adults (CARDIA) study. CARDIA, which tracked nearly 5,000 healthy young adults from four cities in the US for three decades, provided the researchers with data that allowed them to calculate the combined effects of individual risk factors like hypertension, diabetes, and high cholesterol. Moreover, they were able to measure the additive impact of multiple risk factors leading to cardiovascular disease.
"These data make clear the importance of instituting risk-factor reduction strategies as early in life as is feasible to reduce time-related cumulative exposure to harmful risks," said study lead author Michael J. Domanski, MD, Professor of Medicine, at UMSOM. "These results suggest that a self-declared Black racial status is a marker of underlying and unexplained differences in risk-factor impact."
The results of this study could help guide physicians in developing personalized prevention strategies for individual patients. Public health policymakers also could use the new risk calculation tool to assess the likely impact of proposed heart disease prevention programs, while researchers could use it to help design clinical trials to test heart disease prevention strategies.
"By examining the long-term impact of multiple risk factors on cardiovascular disease, our study highlights the importance of cumulative exposure in determining an individual's risk," said Xin Tian, Ph.D., Adjunct Professor at UMSOM, and a biostatistician at the National Heart, Lung, and Blood Institute (NHLBI), part of the National Institutes of Health (NIH). "Our findings underscore the need for personalized prevention strategies that address both the time course and severity of these risk factors. As scientists, our duty is to use this knowledge to inform the development of effective prevention and intervention strategies that can reduce the burden of cardiovascular disease on individuals and society as a whole."
The R Shiny app, developed in this study, is a tool that allows medical providers to insert cardiovascular risks, patient history, and patient race to determine individual risks and how best to address them. Electronic medical records are now widely available, making the development of tools such as the R Shiny app possible. R Shiny can be used to estimate cardiovascular risks after age 40 based on the severity of risk factors earlier in adulthood. The app is hosted on NHLBI's website.
"Our study demonstrates the power of innovative statistical data-science approaches in enabling biomedical researchers to gain deeper insights into complex health issues, such as cardiovascular disease. We were able to develop risk prediction models that provide a more accurate and personalized assessment of an individual's risk," said Colin Wu, Ph.D., Adjunct Professor of Medicine at UMSOM and a mathematical statistician at NHLBI, part of NIH.
During the two-decade follow-up period after age 40, the researchers found that 316 people in the study experienced their first cardiovascular event, including heart disease, strokes, and congestive heart failure.
"This new tool could be used by cardiologists to convince patients to take the necessary steps to lower their risk of heart attack or stroke by quantifying how much their risk would improve if they better managed, for example, their cholesterol and hypertension," said Mark Gladwin, MD, Dean, University of Maryland School of Medicine, Vice President for Medical Affairs, University of Maryland, Baltimore, and the John Z. and Akiko K. Bowers Distinguished Professor. "That could have a significant impact, particularly in vulnerable populations who have not been aggressively treated for cardiovascular risks in the past due to long-standing health inequities."
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