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Living in a food desert doubles stroke risk for patients with atrial fibrillation, study finds

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2025-09-19T20:30:18+05:30  |  Updated On 19 Sept 2025 8:30 PM IST
Living in a food desert doubles stroke risk for patients with atrial fibrillation, study finds
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Patients with atrial fibrillation who live in neighborhoods with poor access to full-service grocery stores face sharply higher odds of stroke and death, according to a new study from Tulane University.

Researchers at Tulane University School of Medicine found that, compared with similar patients in better-served areas, those in food deserts had more than double the risk of ischemic stroke and nearly four times the risk of death.

The study, published in the journal JACC: Advances, analyzed electronic health records for 1,553 patients treated for atrial fibrillation (an irregular heartbeat) in the New Orleans area between 2010 and 2019. Using federal maps that flag “food deserts,” defined as places where many residents live more than a mile from a supermarket, the team sorted patients by ZIP code into two groups: 1,115 living inside food deserts and 438 living outside them.

Researchers then compared patients with similar medical profiles but different levels of neighborhood food access. They tracked who was hospitalized, suffered stroke or died and adjusted for age, sex, body mass index, common health conditions (such as hypertension and diabetes) and medications, including blood thinners.

The differences were stark. After accounting for other risks, food-desert residence was linked to a 2.21-times higher risk of ischemic stroke and a 3.84-times higher risk of death over five years. A combined measure of “any bad outcome” (hospitalization, stroke or death) was 42% higher. Researchers believe it is likely that residents living in food deserts nationwide experience similar increased risks.

The findings demonstrate an urgent need to increase cardiovascular screenings for conditions such as atrial fibrillation, particularly in New Orleans and communities with similar socioeconomic profiles, said corresponding author Dr. Nassir Marrouche, director of the Tulane University Heart and Vascular Institute.

“This research shows that for patients with AF, the environment they live in, the basic infrastructure of their neighborhood, can be just as important as the care they receive in the clinic,” Dr. Marrouche said. “Something as fundamental as access to healthy food could literally save lives.”

Researchers used the REACHnet clinical research database to identify local patients and matched their ZIP codes to the U.S. Department of Agriculture’s Food Access Research Atlas. They then used standard survival curves and risk models to compare outcomes while controlling for other factors.

To help reduce risks for patients, the authors suggest clinicians ask simple screening questions about food access and connect at-risk patients to nutrition programs or social services. Policymakers and health systems could target nutrition support and grocery access in neighborhoods where medically vulnerable residents live.

“At the Tulane Research Innovation for Arrhythmia Discovery (TRIAD) Center, our research team is committed to addressing the specific needs of the New Orleans community,” Marrouche said. “Early detection through expanded screening efforts can save lives in these vulnerable communities where we’ve unearthed these striking disparities. By focusing on local data and real-world health disparities, we’re working to create more inclusive models of care and improve cardiovascular outcomes where it’s needed most.”

Reference:

Christianson, E, Liu, Y, Dahl, A. et al. Impact of Food Desert Residence on Ischemic Stroke and Hospitalization Risk in Atrial Fibrillation Patients. JACC Adv. 2025 Oct, 4 https://doi.org/10.1016/j.jacadv.2025.102083

JACC Advancesstrokeatrial fibrillationischemic strokeCardiovascular disorderCoronary artery diseasehypertension
Source : JACC Advances
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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