RT info:eu-repo/semantics/article T1 Predicting length of stay across hospital departments A1 Puentes Gutiérrez, Jesús Manuel A1 Sicilia Urbán, Miguel Ángel A1 Sánchez Alonso, Salvador A1 García Barriocanal, María Elena K1 Length of stay K1 Hospital department K1 Machine learning K1 Decision tree K1 Random forest K1 Informática K1 Computer science AB The length of hospital stay and its implications have a significant economic and human impact. As a consequence, the prediction of that key parameter has been subject to previous research in recent years. Most previous work has analysed length of stay in particular hospital departments within specific study groups, which has resulted in successful prediction rates, but only occasionally reporting predictive patterns. In this work we report a predictive model for length of stay (LOS) together with a study of trends and patterns that support a better understanding on how LOS varies across different hospital departments and specialties. We also analyse in which hospital departments the prediction of LOS from patient data is more insightful. After estimating predictions rates, several patterns were found; those patterns allowed, for instance, to determine how to increase prediction accuracy in women admitted to the emergency room for enteritis problems. Overall, concerning these recognised patterns, the results are up to 21.61% better than the results with baseline machine learning algorithms in terms of error rate calculation, and up to 23.83% in terms of success rate in the number of predicted which is useful to guide the decision on where to focus attention in predicting LOS. PB IEEE SN 2169-3536 YR 2021 FD 2021-03-17 LK http://hdl.handle.net/10017/50591 UL http://hdl.handle.net/10017/50591 LA eng DS MINDS@UW RD 23-abr-2024