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Delirium in older emergency department patients is an independent predictor of hospital length of stay.
Acad Emerg Med 2011; 18(5):451-7AE

Abstract

OBJECTIVES

The consequences of delirium in the emergency department (ED) remain unclear. This study sought to determine if delirium in the ED was an independent predictor of prolonged hospital length of stay (LOS).

METHODS

This prospective cohort study was conducted at a tertiary care, academic ED from May 2007 to August 2008. The study included English-speaking patients aged 65 and older who were in the ED for less than 12 hours at enrollment. Patients were excluded if they refused consent, were previously enrolled, were unable to follow simple commands at baseline, were comatose, or did not have a delirium assessment performed by the research staff. The Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) was used to determine delirium status. Patients who were discharged directly from the ED were considered to have a hospital LOS of 0 days. To determine if delirium in the ED was independently associated with time to discharge, Cox proportional hazard regression was performed adjusted for age, comorbidity burden, severity of illness, dementia, functional impairment, nursing home residence, and surgical procedure. A sensitivity analysis, which included admitted patients only, was also performed.

RESULTS

A total of 628 patients met enrollment criteria. The median age was 75 years (interquartile range [IQR] = 69-81), 365 (58%) patients were female, 111 (18%) were nonwhite, 351 (56%) were admitted to the hospital, and 108 (17%) were delirious in the ED. Median LOS was 2 days (IQR = 0-5.5) for delirious ED patients and 1 day (IQR = 0-3) for nondelirious ED patients (p < 0.001). The hazard ratio (HR) of delirium for time to discharge was 0.71 (95% confidence interval [CI] = 0.57 to 0.89) after adjusting for confounders, and indicated that ED patients with delirium were more likely to have prolonged hospital LOS compared with those without delirium. For the sensitivity analysis, which included only hospitalized patients, the adjusted HR was 0.76 (95% CI = 0.58 to 0.99).

CONCLUSIONS

Delirium in older ED patients has negative consequences and is an independent predictor of prolonged hospitalizations.

Authors+Show Affiliations

Department of Emergency Medicine (JHH, ABS, Division of General Internal Medicine and Public Health (JS, RSD), Vanderbilt University Medical Center, Nashville, TN, USA. Jin.h.han@vanderbilt.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

21521405

Citation

Han, Jin H., et al. "Delirium in Older Emergency Department Patients Is an Independent Predictor of Hospital Length of Stay." Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine, vol. 18, no. 5, 2011, pp. 451-7.
Han JH, Eden S, Shintani A, et al. Delirium in older emergency department patients is an independent predictor of hospital length of stay. Acad Emerg Med. 2011;18(5):451-7.
Han, J. H., Eden, S., Shintani, A., Morandi, A., Schnelle, J., Dittus, R. S., ... Ely, E. W. (2011). Delirium in older emergency department patients is an independent predictor of hospital length of stay. Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine, 18(5), pp. 451-7. doi:10.1111/j.1553-2712.2011.01065.x.
Han JH, et al. Delirium in Older Emergency Department Patients Is an Independent Predictor of Hospital Length of Stay. Acad Emerg Med. 2011;18(5):451-7. PubMed PMID: 21521405.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Delirium in older emergency department patients is an independent predictor of hospital length of stay. AU - Han,Jin H, AU - Eden,Svetlana, AU - Shintani,Ayumi, AU - Morandi,Alessandro, AU - Schnelle,John, AU - Dittus,Robert S, AU - Storrow,Alan B, AU - Ely,E Wesley, Y1 - 2011/04/26/ PY - 2011/4/28/entrez PY - 2011/4/28/pubmed PY - 2011/9/8/medline SP - 451 EP - 7 JF - Academic emergency medicine : official journal of the Society for Academic Emergency Medicine JO - Acad Emerg Med VL - 18 IS - 5 N2 - OBJECTIVES: The consequences of delirium in the emergency department (ED) remain unclear. This study sought to determine if delirium in the ED was an independent predictor of prolonged hospital length of stay (LOS). METHODS: This prospective cohort study was conducted at a tertiary care, academic ED from May 2007 to August 2008. The study included English-speaking patients aged 65 and older who were in the ED for less than 12 hours at enrollment. Patients were excluded if they refused consent, were previously enrolled, were unable to follow simple commands at baseline, were comatose, or did not have a delirium assessment performed by the research staff. The Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) was used to determine delirium status. Patients who were discharged directly from the ED were considered to have a hospital LOS of 0 days. To determine if delirium in the ED was independently associated with time to discharge, Cox proportional hazard regression was performed adjusted for age, comorbidity burden, severity of illness, dementia, functional impairment, nursing home residence, and surgical procedure. A sensitivity analysis, which included admitted patients only, was also performed. RESULTS: A total of 628 patients met enrollment criteria. The median age was 75 years (interquartile range [IQR] = 69-81), 365 (58%) patients were female, 111 (18%) were nonwhite, 351 (56%) were admitted to the hospital, and 108 (17%) were delirious in the ED. Median LOS was 2 days (IQR = 0-5.5) for delirious ED patients and 1 day (IQR = 0-3) for nondelirious ED patients (p < 0.001). The hazard ratio (HR) of delirium for time to discharge was 0.71 (95% confidence interval [CI] = 0.57 to 0.89) after adjusting for confounders, and indicated that ED patients with delirium were more likely to have prolonged hospital LOS compared with those without delirium. For the sensitivity analysis, which included only hospitalized patients, the adjusted HR was 0.76 (95% CI = 0.58 to 0.99). CONCLUSIONS: Delirium in older ED patients has negative consequences and is an independent predictor of prolonged hospitalizations. SN - 1553-2712 UR - https://www.unboundmedicine.com/medline/citation/21521405/Delirium_in_older_emergency_department_patients_is_an_independent_predictor_of_hospital_length_of_stay_ L2 - https://doi.org/10.1111/j.1553-2712.2011.01065.x DB - PRIME DP - Unbound Medicine ER -