Low-Quality Food Environments Increase MASLD-related Mortality
FROM CLINICAL GASTROENTEROLOGY AND HEPATOLOGY
according to investigators.
These findings highlight the importance of addressing disparities in food environments and social determinants of health to help reduce MASLD-related mortality, lead author Annette Paik, MD, of Inova Health System, Falls Church, Virginia, and colleagues reported.
“Recent studies indicate that food swamps and deserts, as surrogates for food insecurity, are linked to poor glycemic control and higher adult obesity rates,” the investigators wrote in Clinical Gastroenterology and Hepatology. “Understanding the intersection of these factors with sociodemographic and clinical variables offers insights into MASLD-related outcomes, including mortality.”
To this end, the present study examined the association between food environments and MASLD-related mortality across more than 2,195 US counties. County-level mortality data were obtained from the CDC WONDER database (2016-2020) and linked to food environment data from the US Department of Agriculture Food Environment Atlas using Federal Information Processing Standards (FIPS) codes. Food deserts were defined as low-income areas with limited access to grocery stores, while food swamps were characterized by a predominance of unhealthy food outlets relative to healthy ones.
Additional data on obesity, type 2 diabetes (T2D), and nine social determinants of health were obtained from CDC PLACES and other publicly available datasets. Counties were stratified into quartiles based on MASLD-related mortality rates. Population-weighted mixed-effects linear regression models were used to evaluate associations between food environment exposures and MASLD mortality, adjusting for region, rural-urban status, age, sex, race, insurance coverage, chronic dis-ease prevalence, SNAP participation, and access to exercise facilities.
Counties with the worst food environments had significantly higher MASLD-related mortality, even after adjusting for clinical and sociodemographic factors. Compared with counties in the lowest quartile of MASLD mortality, those in the highest quartile had a greater proportion of food deserts (22.3% vs 14.9%; P < .001) and food swamps (73.1% vs 65.7%; P < .001). They also had a significantly higher prevalence of obesity (40.5% vs 32.5%), type 2 diabetes (15.8% vs 11.4%), and physical inactivity (33.7% vs 24.9%).
Demographically, counties with higher MASLD mortality had significantly larger proportions of Black and Hispanic residents, and were more likely to be rural and located in the South. These counties also had significantly lower median household incomes, higher poverty rates, fewer adults with a college education, lower access to exercise opportunities, greater SNAP participation, less broadband access, and more uninsured adults.
In multivariable regression models, both food deserts and food swamps remained independently associated with MASLD mortality. Counties in the highest quartile of food desert exposure had a 14.5% higher MASLD mortality rate, compared with the lowest quartile (P = .001), and those in the highest quartile for food swamp exposure had a 13.9% higher mortality rate (P = .005).
Type 2 diabetes, physical inactivity, and lack of health insurance were also independently associated with increased MASLD-related mortality.
“Implementing public health interventions that address the specific environmental factors of each county can help US policymakers promote access to healthy, culturally appropriate food choices at affordable prices and reduce the consumption of poor-quality food,” the investigators wrote. “Moreover, improving access to parks and exercise facilities can further enhance the impact of healthy nutrition. These strategies could help curb the growing epidemic of metabolic diseases, including MASLD and related mortality.”
This study was supported by King Faisal Specialist Hospital & Research Center, the Global NASH Council, Center for Outcomes Research in Liver Diseases, and the Beatty Liver and Obesity Research Fund, Inova Health System. The investigators disclosed no conflicts of interest.