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We found that the majority of ED patients in our large, diverse sample wanted to be involved in medical decisions, especially in the case of a "serious" medical problem, and felt that they had the ability to do so. Nevertheless, many patients were unlikely to actively seek involvement and defaulted to allowing the physician to make decisions during the ED visit. After fully explaining the consequences of a decision, clinicians should make an effort to explicitly ascertain patients' desired level of involvement in decision making.

ObjectiveTo examine current trends in the characteristics of patients visiting California emergency departments (EDs) in order to better direct the allocation of acute care resources.DesignA retrospective study.SettingWe analysed ED utilisation trends between 2005 and 2015 in California using non-public patient data from California’s Office of Statewide Health Planning and Development.ParticipantsWe included all ED visits in California from 2005 to 2015.Primary and secondary outcome measuresWe analysed ED visits and visit rates by age, sex, race/ethnicity, payer and urban/rural trends. We further examined age, sex, race/ethnicity and urban/rural trends within each payer group for a more granular picture of the patient population. Additionally, we looked at the proportion of patients admitted from the ED and distribution of diagnoses.ResultsBetween 2005 and 2015, the annual number of ED visits increased from 10.2 to 14.2 million in California. ED visit rates increased by 27.8% (p<0.001), with the greatest increases among patients aged 5–19 (37.4%, p<0.001) and 45–64 years (41.1%, p<0.001), non-Hispanic Black and Hispanic patients (56.8% and 48.8%, p<0.001), the uninsured and Medicaid-insured (36.1%, p=0.002; 28.6%, p<0.001) and urban residents (28.3%, p<0.001). The proportion of ED visits resulting in hospitalisation decreased by 18.3%, with decreases across all payer groups.ConclusionsOur findings reveal an increasing demand for emergency care and may reflect current limitations in accessing care in other parts of the healthcare system. Policymakers may need to recognise the increasingly vital role that EDs are playing in the provision of care and consider ways to incorporate this changing reality into the delivery of health services.

Frequent emergency department (ED) use often serves as a marker for poor access to non-ED ambulatory care. Policy makers and providers hoped that by expanding coverage, the Affordable Care Act (ACA) would curtail frequent ED use. We used data from California's Office of Statewide Health Planning and Development to compare the characteristics of frequent ED users among nonelderly adults in California before and after implementation of several major coverage expansion provisions in the ACA. Frequent users-patients with four or more annual ED visits-accounted for 7.9 percent of ED patients before and 8.5 percent after those provisions were implemented, and they were responsible for 30.7 percent of all visits before and 31.6 percent after. However, after controlling for patient-level characteristics, we found that the odds of being a frequent ED user were significantly lower post ACA for Medicaid-insured patients. Uninsured patients were also less likely to be frequent users post ACA, while privately insured patients experienced little change. The largest predictors of frequent ED use included having a diagnosis of a mental health condition or a substance use disorder. Interventions to address frequent ED use must involve Medicaid managed care plans, given that more than two-thirds of frequent ED users post ACA have Medicaid as their primary coverage source.

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