An Evolutionary UnderBagging Approach to Tackle the Survival Prediction of Trauma Patients: A Case Study at the Hospital of Navarre
Survival prediction systems are used among emergency services at hospitals in order to measure their quality objectively. In order to do so, the estimated mortality rate given by a prediction model is compared with the real rate of the hospital. Hence, the accuracy of the prediction system is a key...
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doaj-bdce090aa4bb4daf84e39ab7cdbe2cb32021-03-29T23:02:02ZengIEEEIEEE Access2169-35362019-01-017760097602110.1109/ACCESS.2019.29215918733041An Evolutionary UnderBagging Approach to Tackle the Survival Prediction of Trauma Patients: A Case Study at the Hospital of NavarreJose Antonio Sanz0https://orcid.org/0000-0002-1427-9909Mikel Galar1Humberto Bustince2https://orcid.org/0000-0002-1279-6195Tomas Belzunegui3Department of Statistics, Computer Science, and Mathematics, Universidad Publica de Navarra, Navarra, SpainDepartment of Statistics, Computer Science, and Mathematics, Universidad Publica de Navarra, Navarra, SpainDepartment of Statistics, Computer Science, and Mathematics, Universidad Publica de Navarra, Navarra, SpainComplejo Hospitalario de Navarra, Instituto de Investigación de Navarra, Navarrabiomed, IDISNA (Instituto de Investigación de Navarra), Navarra, SpainSurvival prediction systems are used among emergency services at hospitals in order to measure their quality objectively. In order to do so, the estimated mortality rate given by a prediction model is compared with the real rate of the hospital. Hence, the accuracy of the prediction system is a key factor as more reliable estimations can be obtained. Survival prediction systems are aimed at scoring the severity of patients' injuries. Afterward, this score is used to estimate whether the patient will survive or not. Luckily, the number of patients who survive their injuries is greater than that of those who die. However, this degree of imbalance implies a greater difficulty in learning the prediction models. The aim of this paper is to develop a new prediction system for the Hospital of Navarre with the goal of improving the prediction capabilities of the currently used models since it would imply having a more reliable measurement of its quality. In order to do so, we propose a new strategy to conform an ensemble of classifiers using an evolutionary under sampling process in the bagging methodology. The experimental study is carried out over 462 patients who were treated at the Hospital of Navarre. Our new ensemble approach is an appropriate tool to deal with this problem as it is able to outperform the currently used models by the staff of the hospital as well as several state-of-the-art ensemble approaches designed for imbalanced domains.https://ieeexplore.ieee.org/document/8733041/Ensemblesevolutionary algorithmsimbalanced classificationsurvival predictiontrauma |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jose Antonio Sanz Mikel Galar Humberto Bustince Tomas Belzunegui |
spellingShingle |
Jose Antonio Sanz Mikel Galar Humberto Bustince Tomas Belzunegui An Evolutionary UnderBagging Approach to Tackle the Survival Prediction of Trauma Patients: A Case Study at the Hospital of Navarre IEEE Access Ensembles evolutionary algorithms imbalanced classification survival prediction trauma |
author_facet |
Jose Antonio Sanz Mikel Galar Humberto Bustince Tomas Belzunegui |
author_sort |
Jose Antonio Sanz |
title |
An Evolutionary UnderBagging Approach to Tackle the Survival Prediction of Trauma Patients: A Case Study at the Hospital of Navarre |
title_short |
An Evolutionary UnderBagging Approach to Tackle the Survival Prediction of Trauma Patients: A Case Study at the Hospital of Navarre |
title_full |
An Evolutionary UnderBagging Approach to Tackle the Survival Prediction of Trauma Patients: A Case Study at the Hospital of Navarre |
title_fullStr |
An Evolutionary UnderBagging Approach to Tackle the Survival Prediction of Trauma Patients: A Case Study at the Hospital of Navarre |
title_full_unstemmed |
An Evolutionary UnderBagging Approach to Tackle the Survival Prediction of Trauma Patients: A Case Study at the Hospital of Navarre |
title_sort |
evolutionary underbagging approach to tackle the survival prediction of trauma patients: a case study at the hospital of navarre |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2019-01-01 |
description |
Survival prediction systems are used among emergency services at hospitals in order to measure their quality objectively. In order to do so, the estimated mortality rate given by a prediction model is compared with the real rate of the hospital. Hence, the accuracy of the prediction system is a key factor as more reliable estimations can be obtained. Survival prediction systems are aimed at scoring the severity of patients' injuries. Afterward, this score is used to estimate whether the patient will survive or not. Luckily, the number of patients who survive their injuries is greater than that of those who die. However, this degree of imbalance implies a greater difficulty in learning the prediction models. The aim of this paper is to develop a new prediction system for the Hospital of Navarre with the goal of improving the prediction capabilities of the currently used models since it would imply having a more reliable measurement of its quality. In order to do so, we propose a new strategy to conform an ensemble of classifiers using an evolutionary under sampling process in the bagging methodology. The experimental study is carried out over 462 patients who were treated at the Hospital of Navarre. Our new ensemble approach is an appropriate tool to deal with this problem as it is able to outperform the currently used models by the staff of the hospital as well as several state-of-the-art ensemble approaches designed for imbalanced domains. |
topic |
Ensembles evolutionary algorithms imbalanced classification survival prediction trauma |
url |
https://ieeexplore.ieee.org/document/8733041/ |
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