Forecasting daily counts of patient presentations in Australian emergency departments using statistical models with time-varying predictors
Description
Objective: This research aimed to (i) assess the effects of time-varying predictors (day of the week, month, year, holiday, temperature) on daily ED presentations and (ii) compare the accuracy of five methods for forecasting ED presentations, including four statistical methods and a machine learning approach.
Methods: Predictors of ED presentations were assessed using generalised additive models (GAMs), generalised linear models, multiple linear regression models, seasonal autoregressive integrated moving average models and random forest. The accuracy of short-term (14 days), mid-term (30 days) and long-term (365 days) forecasts were compared using two measures of forecasting error.
Results: The data are the numbers of presentations to public hospital EDs in South-East Queensland, Australia, from 2009 to 2015. ED presentations are largely affected by year of presentation, and to a lesser extent by month, day of the week and holidays. Maximum daily temperature is also a significant predictor of ED presentations. Of the four statistical models considered, the GAM had the greatest forecasting accuracy, and produced consistent and coherent forecasts, likely due to its flexibility in modelling complex time-varying effects. The random forest machine learning approach had the lowest forecasting accuracy, likely due to overfitting the data.
Conclusions: Calendar and temperature variables, not previously considered in the Australian literature, were found to significantly impact ED presentations. This study also demonstrates the potential of GAMs as a dual explanatory and forecasting method for the modelling, and more accurate prediction, of ED presentations.
Impact and interest:
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ID Code: | 200007 | ||||||
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Item Type: | Contribution to Journal (Journal Article) | ||||||
Refereed: | Yes | ||||||
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Measurements or Duration: | 8 pages | ||||||
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Keywords: | emergency department, forecasting, model, presentation, statistics | ||||||
DOI: | 10.1111/1742-6723.13481 | ||||||
ISSN: | 1742-6731 | ||||||
Pure ID: | 59188385 | ||||||
Divisions: | Current > Research Centres > Centre for Data Science Past > Institutes > Institute for Future Environments Past > QUT Faculties & Divisions > Science & Engineering Faculty ?? 3232 ?? Current > QUT Faculties and Divisions > Faculty of Science Current > Research Centres > Centre for Tropical Crops and Biocommodities |
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Funding Information: | We would like to thank the health data custodians and ED staff members of the Princess Alexandra Hospital, Logan Hospital, Redland Hospital and Queen Elizabeth II Jubilee Hospital. Thanks also to the Queensland University of Technology for funding this study. KID is funded through an Australian Government Research Training Program award and a Queensland University of Technology Higher Degree Research award. | ||||||
Copyright Owner: | 2020 Australasian College for Emergency Medicine | ||||||
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||||||
Deposited On: | 15 May 2020 02:14 | ||||||
Last Modified: | 26 Apr 2024 11:02 |
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