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Background: To predict areas with a high concentration of long-term uninsured (LTU) and Emergency Department (ED) usage by uninsured patients in South Carolina. Methods: American Community Survey data was used to predict the concentration of LTU at the ZIP Code Tabulation Area (ZCTA) level. In a multivariate regression model, the LTU concentration was then modeled to predict ED visits by uninsured patients. ED data came from the restricted South Carolina Patient Encounter data with patients' billing zip codes. A simulation was conducted to predict changes in the ED visit numbers and rates by uninsured patients if the LTU concentration was reduced to a lower level. Results: Overall, there was a positive relationship between ED visit rates by the uninsured patients and areas with higher concentrations of LTU. Our simulation model predicted that if the LTU concentration for each ZCTA was reduced to the lowest quintile, the ED visit rates by the uninsured would decrease significantly. The greatest reduction in the number of ED visits by the uninsured over a two-year period was for the following primary diagnoses: abdominal pain (15,751 visits), cellulitis and abscess (11,260 visits) and diseases for the teeth and supporting structures (10,525 visits). Conclusions: The provision of primary healthcare services to the LTU could help cut back inappropriate uses of ED resources and healthcare costs. [ABSTRACT FROM AUTHOR]

Purpose: Strong evidence supports the relationship between health coverage and improved health status. Little is known about the lasting impact of prior health insurance on the prior insured's use of health services. We aimed to examine the association between prior insurance status and health service utilization (HSU) among the long-term uninsured (LTU) in South Carolina. Methods: The current study used data from in-person interviews of the LTU collected in a 2014 cross-sectional South Carolina survey. Men and women between 18?64 years of age who reported not having health insurance for at least 24 months at the time of data collection were included. Propensity score analysis was used to examine the associations between prior insurance status and three outcome variables: (1) having a usual source of care, (2) HSU, and (3) delaying health care needs. Results: Prior health insurance significantly predicted a greater likelihood of having a usual source of care (effect size: 9.2%, p=0.004) and having had at least one preventive visit during the past 2 years (effect size: 6.4%, p=0.035). Prior insurance coverage was positively associated with delayed health care utilization, but the result was not statistically significant (p=0.703). Conclusions: Among the LTU, ever having insurance coverage was positively associated with having a usual source of care and HSU. The lasting impact of insurance coverage on HSU behavior extends beyond the period of insurance coverage, which provides a more comprehensive and deeper understanding of the long-term implications of national and local efforts in expanding insurance coverage.

Purpose: Strong evidence supports the relationship between health coverage and improved health status. Little is known about the lasting impact of prior health insurance on the prior insured's use of health services. We aimed to examine the association between prior insurance status and health service utilization (HSU) among the long-term uninsured (LTU) in South Carolina. Methods: The current study used data from in-person interviews of the LTU collected in a 2014 cross-sectional South Carolina survey. Men and women between 18-64 years of age who reported not having health insurance for at least 24 months at the time of data collection were included. Propensity score analysis was used to examine the associations between prior insurance status and three outcome variables: (1) having a usual source of care, (2) HSU, and (3) delaying health care needs. Results: Prior health insurance significantly predicted a greater likelihood of having a usual source of care (effect size: 9.2%, p =0.004) and having had at least one preventive visit during the past 2 years (effect size: 6.4%, p =0.035). Prior insurance coverage was positively associated with delayed health care utilization, but the result was not statistically significant ( p =0.703). Conclusions: Among the LTU, ever having insurance coverage was positively associated with having a usual source of care and HSU. The lasting impact of insurance coverage on HSU behavior extends beyond the period of insurance coverage, which provides a more comprehensive and deeper understanding of the long-term implications of national and local efforts in expanding insurance coverage., Competing Interests: No competing financial interests exist.