Healthy food retail availability and cardiovascular mortality in the United States: a cohort study

• Published in: BMJ open Vol. 11; no. 7; p. e048390
• Main Authors: Lovasi, Gina S, Johnson, Norman J, Altekruse, Sean F, Hirsch, Jana A, Moore, Kari A, Brown, Janene R, Rundle, Andrew G, Quinn, James W, Neckerman, Kathryn, Siscovick, David S
• Format: Journal Article
• Language: English
• Published: England BMJ Publishing Group LTD 09.07.2021; BMJ Publishing Group
• Series: Original research
• Subjects: Adult; Cardiovascular disease; Cardiovascular Diseases; Codes; Cohort analysis; Cohort Studies; Commerce; Disease control; Disease prevention; Epidemiology; Ethnicity; Family income; Fast Foods; Food deserts; Heart; Households; Humans; Hypertension; Kidney diseases; Mortality; Population density; Principal components analysis; Public health; Residence Characteristics; United States - epidemiology; United States; United States > US; epidemiology; coronary heart disease; public health; preventive medicine
• ISSN: 2044-6055; 2044-6055
• DOI: 10.1136/bmjopen-2020-048390

ObjectivesWe investigated the association of healthy food retail presence and cardiovascular mortality, controlling for sociodemographic characteristics. This association could inform efforts to preserve or increase local supermarkets or produce market availability.DesignCohort study, combining Mortality Disparities in American Communities (individual-level data from 2008 American Community Survey linked to National Death Index records from 2008 to 2015) and retail establishment data.SettingAcross the continental US area-based sociodemographic and retail characteristics were linked to residential location by ZIP code tabulation area (ZCTA). Sensitivity analyses used census tracts instead, restricted to urbanicity or county-based strata, or accounted for non-independence using frailty models.Participants2 753 000 individuals age 25+ living in households with full kitchen facilities, excluding group quarters.Primary and secondary outcome measuresCardiovascular mortality (primary) and all-cause mortality (secondary).Results82% had healthy food retail (supermarket, produce market) within their ZCTA. Density of such retail was correlated with density of unhealthy food sources (eg, fast food, convenience store). Healthy food retail presence was not associated with reduced cardiovascular (HR: 1.03; 95% CI 1.00 to 1.07) or all-cause mortality (HR: 1.05; 95% CI 1.04 to 1.06) in fully adjusted models (with adjustment for gender, age, marital status, nativity, Black race, Hispanic ethnicity, educational attainment, income, median household income, population density, walkable destination density). The null finding for cardiovascular mortality was consistent across adjustment strategies including minimally adjusted models (individual demographics only), sensitivity analyses related to setting, and across gender or household type strata. However, unhealthy food retail presence was associated with elevated all-cause mortality (HR: 1.15; 95% CI 1.11 to 1.20).ConclusionsIn this study using food establishment locations within administrative areas across the USA, the hypothesised association of healthy food retail availability with reduced cardiovascular mortality was not supported; an association of unhealthy food retail presence with higher mortality was not specific to cardiovascular causes.