The Association between Emergency Department Length of Stay and In-Hospital Mortality in Older Patients Using Machine Learning: An Observational Cohort Study
Author Department
Emergency Medicine
Document Type
Article, Peer-reviewed
Publication Date
7-2023
Abstract
The association between emergency department (ED) length of stay (EDLOS) with in-hospital mortality (IHM) in older patients remains unclear. This retrospective study aims to delineate the relationship between EDLOS and IHM in elderly patients. From the ED patients (n = 383,586) who visited an urban academic tertiary care medical center from January 2010 to December 2016, 78,478 older patients (age ≥60 years) were identified and stratified into three age subgroups: 60-74 (early elderly), 75-89 (late elderly), and ≥90 years (longevous elderly). We applied multiple machine learning approaches to identify the risk correlation trends between EDLOS and IHM, as well as boarding time (BT) and IHM. The incidence of IHM increased with age: 60-74 (2.7%), 75-89 (4.5%), and ≥90 years (6.3%). The best area under the receiver operating characteristic curve was obtained by Light Gradient Boosting Machine model for age groups 60-74, 75-89, and ≥90 years, which were 0.892 (95% CI, 0.870-0.916), 0.886 (95% CI, 0.861-0.911), and 0.838 (95% CI, 0.782-0.887), respectively. Our study showed that EDLOS and BT were statistically correlated with IHM (p < 0.001), and a significantly higher risk of IHM was found in low EDLOS and high BT. The flagged rate of quality assurance issues was higher in lower EDLOS ≤1 h (9.96%) vs. higher EDLOS 7 h
Keywords: boarding time; emergency department; in-hospital mortality; length of stay; machine learning; older adults.
Recommended Citation
Wu L, Chen X, Khalemsky A, Li D, Zoubeidi T, Lauque D, Alsabri M, Boudi Z, Kumar VA, Paxton J, Tsilimingras D, Kurland L, Schwartz D, Hachimi-Idrissi S, Camargo CA Jr, Liu SW, Savioli G, Intas G, Soni KD, Junhasavasdikul D, Cabello JJT, Rathlev NK, Tazarourte K, Slagman A, Christ M, Singer AJ, Lang E, Ricevuti G, Li X, Liang H, Grossman SA, Bellou A. The Association between Emergency Department Length of Stay and In-Hospital Mortality in Older Patients Using Machine Learning: An Observational Cohort Study. J Clin Med. 2023 Jul 18;12(14):4750. doi: 10.3390/jcm12144750.
PMID
37510865