Racial and ethnic inequities in spatial access to pharmacies: A geographic information system analysis.

ABSTRACT

BACKGROUND: Pharmacy accessibility is crucial for equity in health care access because community pharmacists may reach individuals who do not have access to other health care providers. OBJECTIVE: The objective of this study was to determine whether spatial access to pharmacies differs among racial/ethnic groups across the rural-urban continuum. METHODS: We obtained a 30% random sample of the Research Triangle Institute synthetic population, sampled at the census block level. For each individual, we defined optimal pharmacy access as having a driving distance ≤2 miles to the closest pharmacy in urban counties, ≤5 miles in suburban counties, and ≤10 miles in rural counties. We used a logistic regression model to measure the association between race/ethnicity and pharmacy access, while controlling for racial/ethnic composition of the census tract, area deprivation index, income, age, gender, and U.S. region. The model included an interaction between race/ethnicity and urbanicity to evaluate whether racial/ethnic inequities differed across the rural-urban continuum. RESULTS: The sample included 90,749,446 individuals of whom 80.6% had optimal pharmacy access. Racial/ethnic inequities in pharmacy access differed across the rural-urban continuum (P value for interaction= <0.0001). In rural areas, Black (OR 0.87; 95% CI 0.86-0.87), Hispanic (OR 0.80; 95% CI 0.79-0.80), and indigenous (OR 0.47; 95% CI 0.47-0.48) individuals had lower odds of optimal pharmacy access, than White individuals. Hispanic (OR 0.96; 95% CI 0.96-0.97) and Indigenous individuals (OR 0.75; 95% CI 0.75-0.76) had lower odds of optimal pharmacy access compared to White individuals in suburban areas. In Western states, Asian had lower odds of optimal pharmacy access in suburban (OR 0.88; 95% CI 0.86-0.90) and rural areas (OR 0.91; 95% CI 0.87-0.95) compared to White individuals. CONCLUSIONS: Racial/ethnic inequities in spatial access to community pharmacies vary between urban and rural communities. Underrepresented racial/ethnic groups have significantly lower pharmacy access in rural and some suburban areas, but not in urban areas.