National Use of Safety-Net Clinics for Primary Care among Adults with Non-Medicaid Insurance in the United States

To describe the prevalence, characteristics, and predictors of safety-net use for primary care among non-Medicaid insured adults (i.e., those with private insurance or Medicare). Cross-sectional analysis using the 2006-2010 National Ambulatory Medical Care Surveys, annual probability samples of outpatient visits in the U.S. We estimated national prevalence of safety-net visits using weighted percentages to account for the complex survey design. We conducted bivariate and multivariate logistic regression analyses to examine characteristics associated with safety-net clinic use. More than one-third (35.0%) of all primary care safety-net clinic visits were among adults with non-Medicaid primary insurance, representing 6,642,000 annual visits nationally. The strongest predictors of safety-net use among non-Medicaid insured adults were: being from a high-poverty neighborhood (AOR 9.53, 95% CI 4.65-19.53), being dually eligible for Medicare and Medicaid (AOR 2.13, 95% CI 1.38-3.30), and being black (AOR 1.97, 95% CI 1.06-3.66) or Hispanic (AOR 2.28, 95% CI 1.32-3.93). Compared to non-safety-net users, non-Medicaid insured adults who used safety-net clinics had a higher prevalence of diabetes (23.5% vs. 15.0%, p