Impact of Frailty and Sociodemographic Factors on Hospital Admission From an Emergency Department Observation Unit

Association of Functional Status, Cognition, Social Support, and Geriatric Syndrome With Admission From the Emergency Department

Importance

The role of patient-level factors that are unrelated to the specific clinical condition leading to an emergency department (ED) visit, such as functional status, cognitive status, social supports, and geriatric syndromes, in admission decisions is not well understood, partly because these data are not available in administrative databases.

Objective

To determine the extent to which patient-level factors are associated with rates of hospital admission from the ED.

Design, Setting, and Participants

This cohort study analyzed survey data collected from participants (or their proxies, such as family members) enrolled in the Health and Retirement Study (HRS) from January 1, 2000, to December 31, 2018. These HRS data were linked to Medicare fee-for-service claims data from January 1, 1999, to December 31, 2018. Information on functional status, cognitive status, social supports, and geriatric syndromes was obtained from the HRS data, whereas ED visits, subsequent hospital admission or ED discharge, and other claims-derived comorbidities and sociodemographic characteristics were obtained from Medicare data. Data were analyzed from September 2021 to April 2023.

Main Outcomes and Measures

The primary outcome measure was hospital admission after an ED visit. A baseline logistic regression model was estimated, with a binary indicator of admission as the dependent variable of interest. For each primary variable of interest derived from the HRS data, the model was reestimated, including the HRS variable of interest as an independent variable. For each of these models, the odds ratio (OR) and average marginal effect (AME) of changing the value of the variable of interest were calculated.

Results

A total of 42 392 ED visits by 11 783 unique patients were included. At the time of the ED visit, patients had a mean (SD) age of 77.4 (9.6) years, and visits were predominantly for female (25 719 visits [60.7%]) and White (32 148 visits [75.8%]) individuals. The overall percentage of patients admitted was 42.5%. After controlling for ED diagnosis and demographic characteristics, functional status, cognition status, and social supports all were associated with the likelihood of admission. For instance, difficulty performing 5 activities of daily living was associated with an 8.5-percentage point (OR, 1.47; 95% CI, 1.29-1.66) AME increase in the likelihood of admission. Having dementia was associated with an AME increase in the likelihood of admission of 4.6 percentage points (OR, 1.23; 95% CI, 1.14-1.33). Living with a spouse was associated with an AME decrease in the likelihood of admission of 3.9 percentage points (OR, 0.84; 95% CI, 0.79-0.89), and having children living within 10 miles was associated with an AME decrease in the likelihood of admission of 5.0 percentage points (OR, 0.80; 95% CI, 0.71-0.89). Other common geriatric syndromes, including trouble falling asleep, waking early, trouble with vision, glaucoma or cataract, use of hearing aids or trouble with hearing, falls in past 2 years, incontinence, depression, and polypharmacy, were not meaningfully associated with the likelihood of admission.

Conclusion and Relevance

Results of this cohort study suggest that the key patient-level characteristics, including social supports, cognitive status, and functional status, were associated with the decision to admit older patients to the hospital from the ED. These factors are critical to consider when devising strategies to reduce low-value admissions among older adult patients from the ED.

Measuring frailty in younger populations: a rapid review of evidence

OBJECTIVES

Frailty is typically assessed in older populations. Identifying frailty in adults aged under 60 years may also have value, if it supports the delivery of timely care. We sought to identify how frailty is measured in younger populations, including evidence of the impact on patient outcomes and care.

DESIGN

A rapid review of primary studies was conducted.

DATA SOURCES

Four databases, three sources of grey literature and reference lists of systematic reviews were searched in March 2020.

ELIGIBILITY CRITERIA

Eligible studies measured frailty in populations aged under 60 years using experimental or observational designs, published after 2000 in English.

DATA EXTRACTION AND SYNTHESIS

Records were screened against review criteria. Study data were extracted with 20% of records checked for accuracy by a second researcher. Data were synthesised using a narrative approach.

RESULTS

We identified 268 studies that measured frailty in samples that included people aged under 60 years. Of these, 85 studies reported evidence about measure validity. No measures were identified that were designed and validated to identify frailty exclusively in younger groups. However, in populations that included people aged over and under 60 years, cumulative deficit frailty indices, phenotype measures, the FRAIL Scale, the Liver Frailty Index and the Short Physical Performance Battery all demonstrated predictive validity for mortality and/or hospital admission. Evidence of criterion validity was rare. The extent to which measures possess validity across the younger adult age (18-59 years) spectrum was unclear. There was no evidence about the impact of measuring frailty in younger populations on patient outcomes and care.

CONCLUSIONS

Limited evidence suggests that frailty measures have predictive validity in younger populations. Further research is needed to clarify the validity of measures across the adult age spectrum, and explore the utility of measuring frailty in younger groups.

National study of emergency department disposition for high suicide risk geriatric patients

OBJECTIVE

To examine predictors of hospitalization among older adults at high risk for suicide treated in emergency departments (EDs).

METHODS

This retrospective cohort analysis used national 2015 Medicare claims for adults ≥65 years with ED visits for suicide ideation or deliberate self-harm (N = 50,472) merged with data from the Area Health Resource File. Rates and adjusted risk ratios (ARR) of hospital admission were assessed.

RESULTS

A majority of ED episodes resulted in hospital admission (81.9%) with most being admitted to a psychiatric unit (62.8%). Visits for self-harm with suicide ideation were most likely to result in hospitalization (94.7%) compared to suicide ideation alone (84.0%) or self-harm alone (73.1%). Current diagnosis of depression, bipolar, anxiety, cognitive, and personality disorder were associated with hospitalization. Co-occurring mental and substance use disorders were the most predictive mental health condition of admission. Overall, severity of current medical comorbidity was the strongest predictor of hospital admission.

CONCLUSIONS

Most older adults treated in EDs for suicide ideation or self-harm are hospitalized. Medical morbidity plays a more prominent role than other patient factors in admission status.

A National Dataset Analysis of older adults in emergency department observation units

BACKGROUND

Emergency Department (ED) Observation Units (Obs Units) are prevalent in the US, but little is known regarding older adults in observation. Our objective was to describe the Obs Units nationally and observation patients with specific attention to differences in care with increasing age.

DESIGN

This is an analysis of 2010-2013 data from the National Hospital Ambulatory Medical Care Survey (NHAMCS), a national observational cohort study including ED patients. Weighted means are presented for continuous data and weighted percent for categorical data. Multivariable logistic regression was used to identify variables associated with placement in and admission from observation.

RESULTS

The number of adult ED visits varied from 100 million to 107 million per year and 2.3% of patients were placed in observation. Adults ≥65 years old made up a disproportionate number of Obs Unit patients, 30.6%, compared to only 19.7% of total ED visits (odds ratio 1.5 (95% CI 1.5-1.6), adjusting for sex, race, month, day of week, payer source, and hospital region). The overall admission rate from observation was 35.6%, ranging from 31.3% for ages 18-64 years to 47.5% for adults ≥85 years old (p < 0.001). General symptoms (e.g., nausea, dizziness) and hypertensive disease were the most common diagnoses overall. Older adults varied from younger adults in that they were frequently observed for diseases of the urinary system (ICD-9 590-599) and metabolic disorders (ICD-9 270-279).

CONCLUSIONS

Older adults are more likely to be cared for in Obs Units. Older adults are treated for different medical conditions than younger adults.

An Emergency Department Observation Unit Is a Feasible Setting for Multidisciplinary Geriatric Assessments in Compliance With the Geriatric Emergency Department Guidelines

BACKGROUND

The Geriatric Emergency Department (ED) Guidelines recommend providing multidisciplinary geriatric assessment in the ED, but these assessments can be difficult to coordinate and may prolong length of stay. Patients who need longer than a typical ED stay can be placed in an ED observation unit (Obs Unit). We investigated the effects of offering multidisciplinary assessments for ED patients in an Obs Unit.

METHODS

Evaluation by a geriatric hospital consultation team, physical therapist, case manager, and/or pharmacist was made available to all Obs Unit patients. Use of any or all of these ancillary consult services could be requested by the Obs Unit physician. A retrospective chart review of random older adult Obs Unit patients was done to assess rates of consult use and interventions by these consulting teams. All patients ≥ 65 years old in our institutional review board-approved, monthly Obs Unit quality database from October 2015 through March 2017 were included.

RESULTS

Our quality database included 221 older patients over 18 months. The mean (±SD) age was 73.3 (±6.8) years (range = 65-96 years) and 55.2% were women. The mean (±SD) observation length of stay was 14.7 (±6.5) hours. The majority (74.3%) were discharged from the Obs Unit and 72-hour ED recidivism was 3.6%. Overall, at least one of the multidisciplinary consultant services were requested in 40.3% of patients (n = 89). Additional interventions or services were recommended in 80.0% of patients evaluated by physical therapy (32 of 40 patients), 100% of those evaluated by a pharmacist (five of five patients), 38% of those evaluated by case management (27 of 71 patients), and 100% of those evaluated by a geriatrician (eight of eight patients). Only 5.4% (n = 12) of patients were placed in observation specifically for multidisciplinary assessment; these patients had a mean (±SD) length of stay of 12.2 (±5) hours and an admission rate of 41.7%.

CONCLUSIONS

Incorporating elements of multidisciplinary geriatric assessment for older patients is feasible within an observation time frame and resulted in targeted interventions. An Obs Unit is a reasonable setting to offer services in compliance with the Geriatric ED Guidelines.