24 hours - Life in the ER: A state-wide data linkage analysis of in-patients with prolonged emergency department length of stay in New South Wales, Australia

Objective: Describe the characteris-tics and predictors of mortality for patients who spend more than 24 h in the ED waiting for an in-patient bed and compare baseline clinical and demographic characteristics between tertiary and non-tertiary hospitals.Methods: This was a state-wide analysis data linkage analysis of adult (age > 16 years) ED presenta-tions across New South Wales from 2019 to 2020. Cases were included if their mode of separation from ED indicated admission to an in-patient unit including critical care ward and their ED length of stay was greater than or equal to 24 h. Cases were categorised by service-related groups based on principle diagnosis.Results: A total of 26 854 eligible cases were identified. The most com-mon diagnosis groups were psychia-try, cardiology and respiratory. The odds ratio (OR) for 30-day all-cause mortality in admitted patients with an ED length of stay greater than 24 h were highest in those aged > 75 years (OR 15.18, 95% confi-dence interval [CI] 9.99-23.07, P < 0.001), oncology (OR 10.45, 95% CI 7.93-13.77, P < 0.001) and haematology patients (OR 2.95, 95% CI 2.01-4.33, P < 0.001).Conclusion: Interventions and models of care to address ED access block need to focus on mental health patients, older patients particularly those with cardiorespiratory illness and oncology and haematology patients for whom risk of mortality is disproportionately higher.