The impact of the tobacco retail outlet environment on adult cessation and differences by neighborhood poverty

AimsThis study examined the impact of tobacco retail outlets on cessation outcomes over time among non-treatment-seeking smokers and assessed differences by neighborhood poverty and individual factors. DesignObservational longitudinal cohort study using geospatial data. We used generalized estimating equations to examine cessation outcomes in relation to the proximity and density of tobacco retail outlets near the home. SettingEight large Designated Media Areas across the United States. ParticipantsA total of 2377 baseline smokers followed over three waves from 2008 to 2010. MeasurementsOutlet addresses were identified through North American Industry Classification System codes and proximity and density measures were constructed for each participant at each wave. Outcomes included past 30-day abstinence and pro-cessation attitudes. FindingsSmokers in high poverty census tracts living between 500m and 1.9km from an outlet were over two times more likely to be abstinent than those living fewer than 500m from an outlet (P<0.05). Density within 500m of home was associated with reduced abstinence [odds ratio (OR)=0.94; confidence interval (CI)=0.90, 0.98) and lower pro-cessation attitudes (Coeff=-0.07, CI=-0.10, -0.03) only in high poverty areas. In low poverty areas, density within 500m was associated with greater pro-cessation attitudes (OR=0.06; CI=0.01, 0.12). Gender, education and heaviness of smoking did not moderate the impact of outlet proximity and density on cessation outcomes. ConclusionsIn the United States, density of tobacco outlets within 500m of the home residence appears to be negatively associated with smoking abstinence and pro-cessation attitudes only in poor areas.