Potentially avoidable hospitalizations for older patients transferred from long-term care hospitals: a nationwide cross-sectional analysis of potential healthcare consequences.

Multiple chronic disorders and disabilities among older patients in long term care hospitals (LTCH) tends to increase the healthcare burden by causing overcrowding, particularly in emergency departments. Therefore, access to timely and adequate healthcare for LTCH patients is an increasingly important issue, and potentially avoidable hospitalizations (PAHs) and hospitalizations during non-office hours can result as indicators of emergency department overcrowding. The study aimed to evaluate PAHs and hospitalizations during non-office hours in emergency departments for older patients transferred from LTCH compared to patients living at home. We performed a cross-sectional study using the National Emergency Department Information System database from January 2018 to December 2019, in South Korea, with older patients (≥ 65 years) who visited nationwide emergency departments. Adjusted odds ratio (aOR) and 95% confidence interval (CI) for indicators of overcrowding as PAHs and hospitalizations during non-office hours were calculated by logistic regression. Among the 2,177,663 older patients who visited the emergency departments, 98,434 patients were living in LTCH and 2,079,229 patients were living at home. The older patients living in LTCH was associated with PAHs (aOR: 1.90, 95% CI 1.87-1.94) and hospitalizations during non-office hours (aOR: 1.76, 95% CI 1.73-1.78). LTCH patients showed more hospital visits, extended stay in the emergency department, greater prevalence of chronic diseases, greater rates of transfer as well as higher admission rates and mortality as compared to the patients living at home. The LTCH older patients were associated with the indicators of emergency department overcrowding, which impacts health care quality in hospitals. Introduction of policy and training programs for LTCH staff are recommended to manage vulnerable groups in advance.