• Scott A Sims, Gavin Pereira, Daniel M Fatovich, David Preen, and Melissa O'Donnell.
• School of Population and Global Health, The University of Western Australia, Perth, Western Australia, Australia.
• Emerg Med Australas. 2024 Feb 1; 36 (1): 475447-54.

ObjectiveTo assess the usefulness of night-time presentations to measure alcohol-related harm (ARH) in young trauma patients, aged 12-24 years, attending Western Australian EDs.MethodsA retrospective longitudinal study examined alcohol-related ED presentations in Western Australia (WA; 2002-2016) among 12- to 24-year-olds. Data from the Emergency Department Data Collection, WA State Trauma Registry Database and Hospital Morbidity Data Collection were used to identify ARH through specific codes and text searches. These were compared to ARH estimates based on presentation time. Statistical analysis involved sensitivity and specificity calculations and Cox proportional hazards modelling.ResultsWe identified 2644 (17.8%) night-time presentations as a proxy measure of ARH among the 14 887 presentations of patients aged 12-24 years. This closely matched the 3064 (20.6%) identified as ARH through coding methods. The highest risk for an ARH presentation occurred during the night hours between 00.00 and 04.59 hours. During these hours, the risk was 4.4-5.1 times higher compared to presentations at midday (between 12.00 and 12.59 hours). However, when looking at individual patients, we observed that night-time presentations were not a strong predictor of ARH (sensitivity: 0.39; positive predictive value: 0.46).ConclusionsImplementing targeted interventions during night hours could be beneficial in addressing ARH presentations. However, relying solely on the time of presentation as a proxy for ARH is unlikely to effectively identify ARH in young individuals. Instead, the present study emphasises the importance of implementing mandatory data collection strategies in EDs to ensure accurate measurement of ARH cases.© 2023 The Authors. Emergency Medicine Australasia published by John Wiley & Sons Australia, Ltd on behalf of Australasian College for Emergency Medicine.

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