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private insurance or Medicare). For this demonstration, we excluded unknown values for covariates and patients with very rare ... For example, EHR patients were more often female, and older age EHR patients claimed Medicare coverage more often. Some ... Medicare/Medicaid, 3% self-payers, and 2% other payers. The EpicCare EHR system, (Epic Systems Corporation), is used to collect ... we observed that a larger proportion of EHR patients claimed Medicare as their primary payer (PR: 1.55; 95% CI: 1.37-1.74), and ...