Emergency department visits among patients with left ventricular assist devices

Continuous-flow left ventricular assist devices (LVADs) are increasingly implanted to support patients with end-stage heart failure. These patients are at high risk for complications, many of which necessitate emergency care. While rehospitalization rates have been described, there is little data regarding emergency department (ED) visits. We hypothesize that ED visits are frequent and often require admission after LVAD implantation. We performed a retrospective review of patients in our health-care system followed by the advanced heart failure service for LVAD management after implantation between January 2011 and July 2015. We accounted for all ED visits in our system through February 2016, 7 months after the last implantation included. Clinically relevant demographic variables and ED visit details were recorded and analyzed to describe this population. We identified 81 patients with complete data, among whom there were 283 visits (3.49 visits/patient), occurring at a rate of approximately 7.3 ED visits per patient per year alive with LVAD. The most common reason for an ED visit is a complication related to bleeding (18% of visits), followed by chest pain (14%) and dizziness or syncope (13%). Thirty-six percent of patients were discharged from the ED without hospital admission. A growing populace with implanted LVADs represents an important population within emergency medicine. They are at risk for significant complications and frequently present to the ED. While many of these visits may be managed without hospital admission, this specialized patient group represents a potential area for improvement in provider education.     

Intensive management of high‐utilizing adults with sickle cell disease lowers admissions

A minority of super‐utilizing adults with sickle cell disease (SCD) account for a disproportionate number of emergency department (ED) and hospital admissions. We performed a retrospective cohort study comparing the rate of admission before and after the opening of a clinic for adults with SCD. Unique to this clinic was an intensive management strategy, focusing on super‐utilizing adults with 12 or more admissions per year. ED/hospital and 30 days re‐admission rates were compared, 1 year pre‐ and post‐intervention, for those adults who established in the clinic. Prior to the intervention, 17 super‐utilizers, comprising 15% of the pre‐intervention cohort (n = 115), accounted for 58% of the total admissions and had an admission rate of 28 per patient‐year. When pre‐ and post‐intervention years were compared, rate of ED/hospital admission per patient‐year for super‐utilizers decreased from 27.9 to 13.5 (P < 0.001), while there was not a significant reduction for the entire cohort (7.1 vs. 6.1, P = 0.84). Similarly, the decrease in rate of 30 day re‐admission was larger for the super‐utilizers (13.5 per patient‐year to 1.8, P < 0.001), than the whole cohort (2.6 per patient‐year to 0.7, P = 0.006). Among the super‐utilizers, the reduced rate of admission from the pre‐ to post‐clinic intervention year equated to 252 fewer ED/hospital admissions and 227 fewer 30 day re‐admissions. This management strategy focusing on super‐utilizing adults with SCD lowered admission and 30 day re‐admission rate. Am. J. Hematol. 90:215–219, 2015. © 2014 Wiley Periodicals, Inc.     

Ambulatory health care use by patients in a public hospital emergency department

OBJECTIVE: To describe primary care clinic use and emergency department (ED) use for a cohort of public hospital patients seen in the ED, identify predictors of frequent ED use, and ascertain the clinical diagnoses of those with high rates of ED use. DESIGN: Cohort observational study. SETTING: A public hospital in Atlanta, Georgia. PATIENTS: Random sample of 351 adults initially surveyed in the ED in May 1992 and followed for 2 years. MEASUREMENTS AND MAIN RESULTS: Of the 351 patients from the initial survey, 319 (91%) had at least one ambulatory visit in the public hospital system during the following 2 years and one third of the cohort was hospitalized. The median number of subsequent ED visits was 2 (mean 6.4), while the median number of visits to a primary care appointment clinic was 0 (mean 1.1) with only 90 (26%) of the patients having any primary care clinic visits. The 58 patients (16.6%) who had more than 10 subsequent ED visits accounted for 65.6% of all subsequent ED visits. Overall, patients received 55% of their subsequent ambulatory care in the ED, with only 7.5% in a primary care clinic. In multivariate regression, only access to a telephone (odds ratio [OR] 0.48; 95% confidence interval [CI] 0.39, 0.60), hospital admission (OR 5.90; 95% CI 4.01, 8.76), and primary care visits (OR 1.68; 95% CI 1.34, 2.12) were associated with higher ED visit rates. Regular source of care, insurance coverage, and health status were not associated with ED use. From clinical record review, 74.1% of those with high rates of use had multiple chronic medical conditions, or a chronic medical condition complicated by a psychiatric diagnosis, or substance abuse. CONCLUSIONS: All subgroups of patients in this study relied heavily on the ED for ambulatory care, and high ED use was positively correlated with appointment clinic visits and inpatient hospitalization rates, suggesting that high resource utilization was related to a higher burden of illness among those patients. The prevalence of chronic medical conditions and substance abuse among these most frequent emergency department users points to a need for comprehensive primary care. Multidisciplinary case management strategies to identify frequent ED users and facilitate their use of alternative care sites will be particularly important as managed care strategies are applied to indigent populations who have traditionally received care in public hospital EDs. This study was supported by a grant from the Emory Medical Care Foundation.     

The Financial Impact of a Partnership Between an Academic Medical Center and a Free Clinic

PurposeThe objective of this study is to examine the association between an academic medical center and free clinic referral partnership and subsequent hospital utilization and costs for uninsured patients discharged from the academic medical center's emergency department (ED) or inpatient hospital.MethodsThis retrospective, cross-sectional study included 6014 uninsured patients age 18 and older who were discharged from the academic medical center's ED or inpatient hospital between July 2016 and June 2017 and were followed for 90 days in the organization's electronic medical record to identify the occurrence and cost of subsequent same-hospital ED visits and hospital admissions. The occurrence of any subsequent ED visits or hospital admissions and the cost of subsequent hospital care were compared by free clinic referral status after inverse probability of treatment weighting.ResultsOverall, 330 (5.5%) of uninsured patients were referred to the free clinic. Compared with patients referred to the free clinic, patients not referred had greater odds of any subsequent ED visits or hospital admissions within 90 days (odds ratio, 1.8; 95% confidence interval: 1.7-2.0). For patients with any subsequent ED visits or hospital admissions, the mean cost of care for those who were not referred to the free clinic was 2.3 times higher (95% confidence interval: 2.0-2.7) compared to referred patients.ConclusionAn academic medical center-free clinic partnership for follow-up care after discharge from the ED or hospital admission is a promising approach for improving access to care for uninsured patients.     

Frequent use of the hospital emergency department is indicative of high use of other health care services

STUDY OBJECTIVE: We sought to determine the proportion of emergency department patients who frequently use the ED and to compare their frequency of use of other health care services at non-ED sites. METHODS: A computerized patient database covering all ambulatory visits and hospital admissions at all care facilities in the county of Stockholm, Sweden, was used. Frequent ED patients were defined as those making 4 or more visits in a 12-month period. RESULTS: Frequent users comprised 4% of total ED patients, accounting for 18% of the ED visits. The ED was the only source of ambulatory care for 13% of frequent versus 27% of rare ED users (1 ED visit). Primary care visits were made by 72% of frequent ED users versus 57% by rare ED visitors. The corresponding figures for hospital admission were 80% and 36%, respectively. Frequent ED visitors were also more likely to use other care facilities repeatedly: their odds ratio (adjusted for age and sex) was 3.43 (95% confidence interval [CI] 3.10 to 3.78) for 5 or more primary care visits and 29.98 (95% CI 26.33 to 34.15) for 5 or more hospital admissions. In addition, heavy users had an elevated mortality (standardized mortality ratio 1.55; 95% CI 1.26 to 1.90). CONCLUSION: High ED use patients are also high users of other health care services, presumably because they are sicker than average. A further indication of serious ill health is their higher than expected mortality. This knowledge might be helpful for care providers in their endeavors to find appropriate ways of meeting the needs of this vulnerable patient category.     

The Ontario Asthma Regional Variation Study: emergency department visit rates and the relation to hospitalization rates

BACKGROUND: Hospitalization rates for asthma vary more than threefold across regions of Ontario. It is not known whether this variation is primarily due to regional differences in the rate of emergency department (ED) visits or hospital admissions. OBJECTIVE: To determine the variation in ED visit rates for asthma in Ontario, and the relation between ED visit rates and hospitalization rates.Design, setting, and patients: We studied patients with an ED disposition diagnosis of asthma in a stratified sample of 16 hospitals (pediatric facilities, 13; adult facilities, 14) over a 1-year period. Pediatric patients were defined as those patients who were 相似文献   

Transfer of elderly patients from health care facilities to emergency departments: Prospective observational study of the emergency department in Japan

Background:   The purpose of the present paper is to describe the current status of emergency departments (ED) that are used by health care facilities for elderly (HCFFE) residents in Japan.
Methods:   The present paper is based on a prospective, observational study that was undertaken at a teaching hospital in Nagoya city over a 12-month period. All patients transferred to the hospital ED from a regional HCFFE were analyzed. Demographic data, timing of the visit, the primary reason for transfer, diagnosis and disposition were recorded. The need for ambulance use was graded prospectively using three categories of urgency.
Results:   A total of 102 HCFFE residents made 116 ED visits. Their mean age was 83.3 years (range 58–101), 68% were female. The majority of patients (93%) were transferred by ambulance. Ambulance transfer was classified as emergency (20% of patients), urgent (51%) and routine (29%). The main reasons for patients to be transferred were fever (15.5%), fall (11.2%), altered mental status (10.3%), focal neurological deficits (10.3%), and weakness (9.5%). A total of 88% of the ED visits led to admission to the hospital. After admissions, the mean length of stay was 21.4 days and the mortality rate was 13%.
Conclusion:   Elderly patients staying in HCFFE are frequently transferred to an ED, and their visits are likely to lead to admission to the hospital, which is associated with prolonged lengths of stay as well as high mortality rates.     

A randomized controlled trial comparing two vaso‐occlusive episode (VOE) protocols in sickle cell disease (SCD)

Limited evidence guides opioid dosing strategies for acute Sickle Cell (SCD) pain. We compared two National Heart, Lung and Blood (NHBLI) recommended opioid dosing strategies (weight‐based vs. patient‐specific) for ED treatment of acute vaso‐occlusive episodes (VOE). A prospective randomized controlled trial (RCT) was conducted in two ED's. Adults ≥ 21 years of age with SCD disease were eligible. Among the 155 eligible patients, 106 consented and 52 had eligible visits. Patients were pre‐enrolled in the outpatient setting and randomized to one of two opioid dosing strategies for a future ED visit. ED providers accessed protocols through the electronic medical record. Change in pain score (0‐100 mm VAS) from arrival to ED disposition, as well as side effects were assessed. 52 patients (median age was 27 years, 42% were female, and 89% black) had one or more ED visits for a VOE (total of 126 ED study visits, up to 5 visits/patient were included). Participants randomized to the patient‐specific protocol experienced a mean reduction in pain score that was 16.6 points greater than patients randomized to the weight‐based group (mean difference 95% CI = 11.3 to 21.9, P = 0.03). Naloxone was not required for either protocol and nausea and/or vomiting was observed less often in the patient‐specific protocol (25.8% vs 59.4%, P = 0.0001). The hospital admission rate for VOE was lower for patients in the patient‐specific protocol (40.3% vs 57.8% P = 0.05). NHLBI guideline‐based analgesia with patient‐specific opioid dosing resulted in greater improvements in the pain experience compared to a weight‐based strategy, without increased side effects.     

Frequency and Pattern of Emergency Department Visits by Long‐Term Care Residents—A Population‐Based Study

OBJECTIVES: To obtain population‐based estimates of emergency department (ED) visits by long‐term care (LTC) residents. DESIGN: Retrospective cohort study using administrative data. SETTING: All LTC facilities in Ontario, Canada. PARTICIPANTS: All LTC residents who visited an ED at least once during a 6‐month period. MEASUREMENTS: All ED visits were described using the National Ambulatory Care Reporting System. Two distinct visit types were defined. Potentially preventable visits were defined as those for any ambulatory care sensitive condition; these are conditions for which exacerbations that result in hospital use suggest lack of access to adequate primary care. Low‐acuity visits were defined as those triaged as nonurgent at ED registration and ended with return to the LTC facility without hospital admission. RESULTS: Nearly one‐quarter of LTC residents visited the ED at least once in 6 months. Of all visits, 24.6% were for a potentially preventable reason, most commonly pneumonia, urinary tract infection, and congestive heart failure. These visits had a high frequency of ambulance transport (90.4%), emergent triage (35.3%), hospital admission (62.4%), and death within 30 days (23.6%). Of all visits, 11.0% were low acuity. Fall‐related injury was the most common cause. Low‐acuity visits were the shortest (mean length 4.5 ± 4.0 hours) and had the lowest frequency of death within 30 days (4.3%). CONCLUSION: LTC residents made frequent visits to the ED. The visit types showed distinct patterns that suggest a need for better access to medical care for common conditions and a greater emphasis on fall prevention in LTC.     

US national estimation of emergency department utilization by patients given 'HIV/AIDS-related illness' as their primary diagnosis

Background

The emergency department (ED) is one of the most frequent sources of medical care for many HIV‐infected individuals. However, the characteristics and ED utilization patterns of patients with HIV/AIDS‐related illness as the primary ED diagnosis (HRIPD) are unknown.

Methods

We identified the ED utilization patterns of HRIPD visits from a weighted sample of US ED visits (1993–2005) using the National Hospital Ambulatory Medical Care Survey, a nationally representative survey. Data on visits by patients≥18 years old were analysed using procedures for multiple‐stage survey data. We compared the utilization patterns of HRIPD vs. non‐HRIPD visits, and patterns across three periods (1993–1996, 1997–2000 and 2001–2005) to take into account changes in HIV epidemiology.

Results

Overall, 492 000 HRIPD visits were estimated to have occurred from 1993 to 2005, corresponding to 5‐in‐10 000 ED visits. HRIPD visits experienced longer durations of stay (5.2 h vs. 3.4 h; P=0.001), received more diagnostic tests (5.1 vs. 3.3; P<0.001), were prescribed more medications (2.5 vs. 1.8; P<0.001) and were more frequently seen by physicians (99.5%vs. 93.8%; P<0.001) compared with non‐HRIPD visits. HRIPD visits were more likely to result in admission [adjusted odds ratio (OR) 7.67; 95% confidence interval (CI) 5.14–11.44]. The proportion of HRIPD visits that required emergent/urgent care or were seen by attending physicians, and the number of diagnostic tests ordered, significantly increased over time (P<0.05), while the wait time (P=0.003) significantly decreased between the second and third study periods (P<0.05).

Conclusions

Although HRIPD visits were infrequent relative to all ED visits, HRIPD visits utilized significantly more resources than non‐HRIPD visits and the utilization also increased over time.     

Emergency department visits after pancreatoduodenectomy: examining a novel quality metric

BackgroundPostoperative emergency department (ED) visits represent fragmented care, are costly, and often evolve into readmission. Readmission rates after pancreatoduodenectomy (PD) are defined, while ED visits following PD are not. We examined the pattern of 30-day post-discharge ED visits for PD patients.MethodsA quaternary institutional database analysis of adult patients who underwent PD between 2010–2017 was reviewed for ED utilization within 30 days from discharge.ResultsOf the 1,004 patients who underwent PD, 12% (N = 117) patients sought care in the ED within 30 days from postoperative discharge. The median time to ED presentation was 5 days post-discharge (IQR 3–9). Half of ED visits occurred during nights and weekends (N = 59, 50%). Of ED-utilizing patients, 64% (N = 76) were admitted to the hospital and 29% (N = 34) were discharged from the ED. ED visits were associated with a Clavien-Dindo Classification of 0 in 10.2% (N = 13) of patients, I-II in 62.4% (N = 73), and III-V in 26.5% (N = 31).DiscussionPost-discharge ED utilization is a novel quality metric and represents a potential target population for reducing hospital readmissions. Over two-thirds (72%) of ED visits were associated with low acuity complications, and promoting institutional strategies addressing postoperative ED visits may improve patient care and efficient utilization of healthcare resources.     

Management of vaso-occlusive episodes in the day hospital decreases admissions in children with sickle cell disease

Acute vaso-occlusive episodes (VOE) are the most common reason for presentation to the Emergency Department (ED) and inpatient admission in people living with sickle cell disease (SCD). The goal of this study was to compare the hospital admission rate for VOE from our centre’s day hospital (Pediatric Ambulatory Chemotherapy and Transfusion Unit; PACT) versus the ED, and to determine which factors influence admission rate. The study included a total of 370 visits involving 140 children with SCD with a mean age of 10·9 ± 5·5 years. The timing from triage to the first analgesic was significantly different between the PACT and the ED (median, 32 vs. 70 min, P < 0·0001). The initial choice of opioid dosage adhered to our centre’s guidelines 84% of the time in the PACT v. 45% in the ED for morphine (P = 0·0003) and 100% in the PACT vs. 43% (P = 0·002) for hydromorphone. The admission rate from the ED (57%) was significantly higher than that of the PACT (29%) even when accounting for differences in baseline variables (P = 0·0001). In conclusion, the odds of being admitted were 3·8 times higher if the patient was treated in the ED. Timely administration and appropriate dosing of intravenous opioids may change this outcome in the future.     

Geriatric patient emergency visits. Part II: Perceptions of visits by geriatric and younger patients.

OBJECTIVES: To compare group perceptions of reasons for emergency department care, ED use patterns, and the effect of illness on self-care ability for elderly and younger adult patients. DESIGN: Patient survey. SETTING: Six geographically distinct US hospital EDs. PARTICIPANTS: From each site, a stratified sample (approximately 7:3) of elderly (65 years and older) and nonelderly (21 to 64 years old) control ED patients treated during the same time period was contacted. METHODS: Three hundred ninety-nine elderly patients and 172 adult controls were interviewed using a structured survey instrument. Groups were compared using chi 2 analysis and the Mann-Whitney U test. RESULTS: Both the elderly and the control patients (49% versus 38%) commonly stated that the most important reason for coming to the ED was because they were "too sick to wait for an office visit." Of patients with a regular physician, both groups often were referred to the ED by their primary care provider (35% versus 26%). While the elderly had more visits to their primary care provider (3.3 versus 2.9 visits; P less than .00001), there was no difference in the number of ED visits (1.5 versus 1.6 visits) during the preceding six months. Of those released from the ED, more elderly noted deterioration in their ability to care for themselves as a result of their illness (21% versus 11%; P less than .03). CONCLUSION: The elderly use the ED for reasons similar to those for younger adults. Often they feel too ill to wait for an office visit or are referred in by their primary care provider. Elderly patients more commonly have difficulty with self care after release home, and emergency physicians must plan accordingly.     

Emergency department utilization among HIV‐infected patients in a multisite multistate study*

Objective

The aim of this study was to examine Emergency Department (ED) utilization and clinical and sociodemographic correlates of ED use among HIV‐infected patients.

Methods

During 2003, 951 patients participated in face‐to‐face interviews at 14 HIV clinics in the HIV Research Network. Respondents reported the number of ED visits in the preceding 6 months. Using logistic regression, we identified factors associated with visiting the ED in the last 6 months and admission to the hospital from the ED.

Results

Thirty‐two per cent of respondents reported at least one ED visit in the last 6 months. In multivariate analysis, any ED use was associated with Medicaid insurance, high levels of pain (the third or fourth quartile), more than seven primary care visits in the last 6 months, current or former illicit drug use, social alcohol use and female gender. Of those who used ED services, 39% reported at least one admission to the hospital. Patients with pain in the highest quartile reported increased admission rates from the ED as did those who made six or seven primary care visits, or more than seven primary care visits vs. three or fewer.

Conclusions

The likelihood of visiting the ED has not diminished since the advent of highly active antiretroviral therapy (HAART). More ED visits are to treat illnesses not related to HIV or injuries than to treat direct sequelae of HIV infection. With the growing prevalence of people living with HIV infection, the numbers of HIV‐infected patients visiting the ED may increase, and ED providers need to understand potential complications produced by HIV disease.     

Managed care organization authorization denials: lack of patient knowledge and timely alternative ambulatory care

STUDY OBJECTIVE: To assess patient knowledge of managed care organization (MCO) regulations, availability of alternative ambulatory care, and patient outcome after MCO insurance authorization denial for an emergency department visit. METHODS: A medical screening examination and a follow-up structured interview were conducted with patients denied authorization for ED visits. The study was conducted at a large urban hospital with 36,000 annual ED visits and 40% MCO patients. RESULTS: During a 7-month period, 151 patients did not receive MCO authorization for ED care. The interview response rate was 75% (104/138) with 13 patients excluded. Eighty-three percent (86/104) of respondents came to the ED because they believed their problem was an emergency. Four percent (4/104) of the respondents had been instructed to go to the ED but were later denied authorization, whereas 85.6% (89/104) did not know that the MCO could deny payment. Only 37% (38/104) of the respondents reported having received instruction on the MCO preauthorization process, whereas of the 19% who contacted their MCO as instructed, all resulted in scheduling difficulties. Although 57% (59/104) received follow-up within 24 hours, 11% (11/104) of the respondents had a subsequent return visit to the ED with a subsequent admission rate of 4% (4/104). CONCLUSION: Few patients are aware of the need for MCO preauthorization for ED care, and almost half do not receive alternative care within 24 hours. A significant number of patients (11%) returned to the ED with an admission rate of 4%.     

Characteristics of Acute Asthma Patients Attended Frequently Compared with Those Attended Only Occasionally in an Emergency Department

Asthma patients that depend on emergency department (ED) services are generally considered to have extremely poor disease control and prognosis. It is important to identify characteristics related to poor disease control and frequent visits to the ED to apply appropriate clinical management. This study comprised a cross-sectional survey of consecutive patients with asthma exacerbation (age ≥12 years) presenting at the adult ED of a large, tertiary care, university-affiliated hospital over a 2-month period. The frequent visitors (FV) were defined by ≥3 visits to the ED in the preceding year, and the occasional visitors (OV) by ≤2 visits. Eighty-six patients (61 females and 25 males) were included in the study (mean age 38 ± 18 years). Of these patients, 51.2% were FV and 48.8% were OV. Sixty-nine percent had annual income lower than A$3000 and 66.3% had ≤8 years of the formal education. Only 18.6% had used inhaled corticosteroids, 79.1% identified the asthma attack severity, 70.9% increased or initiated inhaled β-agonist, 20.9% increased or initiated steroid therapy, and 55.8% had an asthma action plan for attack. The number of hospital admissions in past year (OR 4.3, P = .02), use of home nebulizer (OR 3.6, P = .05) and the lack of a written asthma action plan (OR 3.3, P = .03) were independently associated with frequent visits to the ED. We conclude that a substantial proportion of the patients that visit the ED are FV. These patients are more likely to have hospital admission in the past year, to use a home nebulizer, and to lack a written asthma action plan. They should be considered the most important target for asthma education.     

A Geriatric Emergency Service for Acutely Ill Elderly Patients: Pattern of Use and Comparison with a Conventional Emergency Department in Italy

The current disease‐oriented, episodic model of emergency care does not adequately address the complex needs of older adults presenting to emergency departments (EDs). Dedicated ED facilities with a specific organization (e.g., geriatric EDs (GEDs)) have been advocated. One of the few GED experiences in the world is described and its outcomes compared with those of a conventional ED (CED). In a secondary analysis of a prospective observational cohort of 200 acutely ill elderly patients presenting to two urban EDs in Ancona, Italy, identifiers and triage, clinical, and social data were collected and the following outcomes considered: early (30‐day) and late (6‐month) ED revisit, frequent ED return, hospital admission, and functional decline. Death, functional decline, any ED revisit and any hospital admission were also considered as a composite outcome. Odds ratios and 95% confidence intervals (CIs) were calculated. Overall, GED patients were older and frailer than CED patients. The two EDs did not differ in terms of early, late, or frequent ED return or in 6‐month hospital admission or functional decline. The mortality rate was slightly but significantly lower in the GED patients (hazard ratio=0.47, 95% CI=0.22–0.99, P=.047). The data suggest noninferiority and, indirectly, a slight superiority for the GED system in the acute care of elderly people, supporting the hypothesis that ED facilities specially designed for older adults may provide better care.     

The use and effectiveness of an emergency department observation unit for elderly patients

STUDY OBJECTIVE: Emergency department observation units are cost-effective alternatives to hospital admission for selected patients. However, the use and effectiveness of these units in the elderly population is unclear. We sought to describe the use of an ED observation unit by elderly patients (>or=65 years), to determine whether the ED observation unit is effective for them in terms of ED observation unit length of stay and hospital admission rates, and to compare efficacy and return visit rates between younger and older patients. METHODS: This is a retrospective observational cohort study of consecutive adult patients sent to an ED observation unit from 1996 to 2000 at a high-volume tertiary care suburban teaching hospital. ED observation unit length of stay of less than 18 hours and admittance rates of less than 30% were used as indicators of efficacy. Diagnosis, length of stay, hospital admission rates, and 30-day return visit rates were compared between younger and older patients. RESULTS: Twenty-two thousand five hundred and thirty adult patients were observed, with 37.2% older than 65 years of age. The most common diagnoses in elderly patients were chest pain (24.0%), dehydration (11.7%), syncope (6.5%), back pain (4.6%), and chronic obstructive pulmonary disease (3.8%). Length of stay in the ED observation unit was longer for the elderly than younger patients but still averaged less than 18 hours (15.8 hours [95% confidence interval (CI) 15.7 to 16.0] versus 14.4 hours [95% CI 14.3 to 14.5], respectively). Elderly patients were more likely to be admitted from the ED observation unit than younger patients (26.1% versus 18.5%); however, their overall admission rate remained less than 30%. Compared with younger patients, the odds ratios for inpatient admission of elderly patients was highest for back pain (2.10; 95% CI 1.62 to 2.73), pyelonephritis (1.78; 95% CI 1.16 to 2.71), and chest pain (1.65; 95% CI 1.44 to 1.89). Thirty-day related return visit rates between age groups were similar (9.4% versus 7.6%). CONCLUSION: Elderly ED observation unit patients had ED observation unit lengths of stay and hospital admission rates that were effective for an ED observation unit setting and ED return visits rates that were comparable with those of younger patients.