Impact of Personal Income Fluctuation on Cardiovascular Disease
Study Overview
A recent study investigated the long-term effects of personal income fluctuation on cardiovascular disease (CVD) among individuals over a 15-year period. This issue has emerged as a significant public health concern. The National Institutes of Health (NIH) and the American Heart Association (AHA) conducted the research, tracking individuals who experienced income fluctuations from 1990 to 2005 and examining their CVD incidence and related mortality over the following decade. The findings were published in the journal Circulation.
Study Population
The research included participants residing in urban areas across several U.S. cities, specifically Birmingham, AL; Chicago, IL; Minneapolis, MN; and Oakland, CA. Approximately 4,000 Black and Caucasian individuals aged 23 to 35 were involved at the commencement of the study in 1990.
Defining Personal Income Fluctuation
Personal income fluctuation was characterized as a decrease in income exceeding 25% from the previous measurement or being below the participant’s average income during the study period from 1990 to 2005.
Results of the Study
Investigators identified CVD events occurring between 2005 and 2015 through medical records and death certificates, with the majority linked to heart disease and stroke. The study recorded a total of 106 CVD events and 164 CVD-related deaths within this period. After adjusting for various sociodemographic, behavioral, and CVD risk factors, it was revealed that individuals experiencing higher income fluctuations from 1990 to 2005 faced a significantly increased risk of CVD and related mortality—nearly doubling the likelihood of such outcomes.
Need for Further Research
The study acknowledged limitations, including the lack of differentiation in health impacts between males and females, as well as the absence of consideration for participants’ initial income levels due to the relatively small number of CVD events. Further research is essential to explore how income fluctuations affect health across different racial groups and among rural populations. Additionally, investigating older demographics would provide further insights, as participants were aged between 45 and 60 at the time of CVD assessment.
Conclusion
The findings from this study underscore the critical relationship between income stability and cardiovascular health, highlighting the need for ongoing research to fully understand these dynamics across diverse populations.
Reference
Elfassy, T., et al. Associations of Income Volatility with Incident Cardiovascular Disease and All-Cause Mortality in a US Cohort: 1990 to 2015. Circulation. 2019 Jan 7.