In recent years, visits to the emergency department (ED) by older adults (generally those aged ≥65 years) have significantly increased [1-3]. Between 2021 and 2050, the global population of older adults is expected to double [4], likely exacerbating the already existing problem of ED overcrowding [5]. The ED often serves as a “point of entry” for older adults, particularly for those without access—or perceived lack of access—to primary care [6,7]. Compared to younger counterparts, older adults in the ED have a higher visit rate and a longer length of stay and are more likely to be admitted to the hospital [3,8,9]. Older adults who visit the ED have a high mortality rate and increased likelihood of dependence for instrumental and basic activities of daily living [1,2].

The nonspecific and atypical nature of disease presentation in older adults presents a challenge in the ED. For example, issues may be missed at triage (ie, undertriaged), as many triage tools do not identify atypical, nonspecific, or multisystem complaints commonly seen in older adults [10-12]. Furthermore, older adults may present with no apparent acute medical reason for their visit, or at least none that can be quickly identified [13,14]. However, it is known that older adults who present with nonspecific complaints, such as “fatigue,” “weakness,” or “feeling unwell,” are at risk for serious conditions (ie, acute coronary syndrome, metabolic or endocrine disturbances, transient ischemic attack, urinary tract infection, dehydration, etc) [15,16]. Older adults may also present with a combination of acute, chronic, social, or functional issues [17-20]. If diagnostic clarity is lacking or if patients are unable to be safely discharged—but they also do not seemingly require a hospital bed—they are often labelled as a “social admission” [17,19]. Other synonymous labels include “failure to cope/thrive” [13,21]; “community emergencies” [22]; or other colloquial terms based on local hospital policy, culture, or media [19,21]. There is no single common term used to describe this older adult population. However, it is known that these patients are at high risk for inappropriate disposition and adverse outcomes [23].

Older adults typically present with geriatric syndromes, including delirium, falls, poorly managed pain, malnutrition, depression, functional decline, sensory impairment, and incontinence [17,19]. If older adults present with poorly controlled or multiple geriatric syndromes, then a “social admission” may occur if no specific diagnosis can be identified [21]. Not infrequently, these patients cannot return to their prior place of residence without additional support, which may require extensive discharge liaison and planning. Examples of these discharge predicaments include the need for additional home supports (including nursing and/or social supports), home equipment or structural remodeling to accommodate physical decline, or placement in a care facility, among others.

Many of these older patients present to the ED in the later stages of their complex health issues and may not return home [21]. There are a few potential contributing factors that may lead to a “social admission,” which include patient (eg, multimorbidity, polypharmacy, frailty, medication adverse events, or progression of or poorly managed health conditions), family/informal caregiver (eg, caregiver burnout, lack of a “back-up” plan, or time and financial constraints for caregiver), peer group (ie, social isolation), institutional (eg, single-system complaints or barriers to formal caregivers), or societal and policy (eg, government policy, accessibility, or age-friendly activities) factors [17,24-29]. If admitted, many health care providers may continue to view these patients as “bed blockers” or “inappropriate admissions” [19,28]. In addition, community-based health care professionals lack the resources, collaborative networks, and organizational infrastructure necessary to provide medical, social, and functional support outside of the hospital setting [30-32]. Thus, these patients continue to use the ED [33,34] and are at risk for further decline (eg, pressure ulcers, sleep deprivation, or delirium) once there [2,35-37]. Several studies also report high mortality rates among older adults with “acopia” (22%) [13], “failure to thrive” (32.5%) [38], and nonspecific chief complaints (20.2%) [39] that present to the ED.

Ideally, alternative pathways to care should exist outside the hospital setting, but our health care systems have not adapted to the demographic changes and increased health care needs of older adults [40]. Thus, many EDs remain ill-equipped to provide adequate care for these patients [40,41]. Historically, medical education systems train physicians and health care systems are designed with a focus on single-system complaints. However, this approach does not effectively meet the needs of older adults with nonacute, nonspecific, or multifactorial complaints [19,21]. The issue is perpetuated when ED health care professionals lack the expertise or comfort in managing these complex patients, while ED trainees often prefer to focus their efforts on more acute presentations [19]. ED-trained health care professionals are not equipped to manage these patient presentations from a time, training, or resource perspective [19,21].

While many EDs have implemented programs or interventions for older adults, they do not specifically target the older adults that present as a “social admission,” “failure to cope/thrive,” or “community emergency” [22,42]. There is a paucity of data around the patient characteristics, adverse events, and health outcomes of these patients that present to the ED. In this scoping review, we hope to describe what is currently known about these patients and identify knowledge gaps that may direct future research or interventions to potentially improve health outcomes.

The aim of this scoping review is to describe older adults (aged ≥65 years) who present to the ED and are labelled as a “social admission” (or other synonymous terms) or present with nonspecific complaints or without an apparent acute medical reason for their visit. The review objective is to summarize patient characteristics, adverse events, exposures, interventions, and disposition from the ED/hospital from the included study population.

The protocol was developed based on the proposed framework from the Joanna Briggs Institute for scoping reviews [43], which builds on the framework previously described by Arksey and O’Malley [44]. The PRISMA-ScR (Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews) checklist has guided the reporting of this protocol and will guide the future reporting of the review itself [45] (see Multimedia Appendix 1).

A scoping review was felt to be the most appropriate to (1) map key concepts and evidence available, (2) summarize current evidence, and (3) identify knowledge gaps in the literature. We also recognize the need for a scoping review to be iterative and that the protocol may deviate to obtain the best results. If a study author identifies the need for a protocol update, other authors will be notified and involved in the process. A consensus will be reached between authors. Protocol deviations will be reported to JMIR Research Protocols.

The inclusion and exclusion criteria are described in Table 1. The criteria are not exhaustive and may be modified throughout the search process, as necessary. If a study author identifies a search term, type of participant, variable, or outcome that they deem potentially relevant, other authors will be notified. A consensus will be reached between authors on whether to update the inclusion and exclusion criteria.

A research librarian, in collaboration with the review team, developed search strategies to identify potentially relevant articles for screening. The following databases will be searched: (1) MEDLINE, (2) Embase, (3) Scopus, (4) PsycINFO, and (5) CINAHL. The search strategies are presented in Multimedia Appendices 2-6. Search dates are from 1946 to November 8, 2022. Some of the search terms included are “social admission,” “social patient,” “acopia,” “bed blocker,” geriatric emergenc*,” and “community emergency,” among others (see Multimedia Appendix 1). The search strategies were piloted by ensuring that they captured a few key articles that are likely to be included in the final review. Records will be exported to EndNote software (Clarivate Analytics) [46] for deduplication and citation management and then into Covidence [47] for article screening. A final search will be repeated prior to the draft of the manuscript. Searches of the databases will be supplemented by manual searches through the references lists of original journal article publications, as well as citation searching when appropriate. If a relevant review or meta-analysis is identified, we will manually search the associated reference list.

Two reviewers will independently screen titles and abstracts identified by all electronic databases against the predetermined inclusion and exclusion criteria (see Table 1) and document their findings in Covidence [47]. To ensure interrater reliability, 10% of the titles and abstracts were piloted before starting the formal screening process. A flow chart will be used to report the study selection process according to the PRISMA-ScR statement. Any disagreement of the titles and abstracts identified between reviewers will be resolved via consensus between reviewers or via arbitration by a third reviewer if consensus is not achievable.

Next, articles that are deemed relevant will be reviewed in full and screened according to the inclusion and exclusion criteria. Any disagreement of the full-text review between reviewers will be resolved via consensus between reviewers or via arbitration by a third reviewer if consensus is not achievable. When a duplicate study is identified, the data will be extracted from the most informative study sample, but all published articles will be included in the reference list. When important data are missing, the authors of all eligible studies will be contacted.

Reviewers will use standardized pro forma data extraction Microsoft Excel sheets to independently extract relevant data from included studies. To ensure interrater reliability, we will pilot 10 studies prior to formally starting the data collection process using the data extraction sheets. Variables and data to be extracted are listed in Textbox 1. Other key information related to the review objectives may also be collected. Further data points may be added if unforeseen, useful data can be extracted. We will provide a narrative synthesis of study data. Text and tables will be used to provide a descriptive summary of included studies and study characteristics.

As this is a scoping review of the available evidence, no quality assessment will be performed.

The results of this scoping review aim to inform ED physicians and other ED health care practitioners about this population. We hope that appropriate stakeholders and policy makers can adapt their approach to the population labelled as a “social admission” and with nonacute, nonspecific complaints. We aim to describe the characteristics of this population, how they present, and any exposures or adverse events experienced during their ED stay or “social admission.” It is expected that this population may demonstrate frailty, comorbidity, and polypharmacy. We expect the reasons for presentation to include nonspecific complaints, such as “weakness” or “generally unwell,” but to also include functional or social reasons that are difficult for ED physicians to navigate. We expect acute medical illnesses to be missed and for disposition and discharge planning to be difficult. We also expect adverse events, revisit, admission, and mortality rates to be high, if documented.

To date, several original journal articles have been published in this area. However, the terms used to describe this population varies greatly between institutions and over decades. To our knowledge, this is the first review to be conducted on this topic with the intention of including all synonymous and colloquial terms in the literature equivalent to “social admission” and nonacute and nonspecific complaints in the ED. Strengths of our study include our broad-scope search strategies and the inclusion of a wide range of study designs. We chose to conduct a scoping review and not a systematic review as we wanted to focus on the state of research that exists for this emerging topic, not necessarily its quality. Limitations may include the inability to make evidence-based recommendations for clinical guidelines and a lack of risk of bias assessment for included full-text studies.

We hope that this scoping review identifies priority areas for future research. Dissemination will help practitioners and the public understand this patient population. A multidisciplinary approach will help guide the dissemination of results at local hospitals and clinical sites. We plan to publish our results in a peer-reviewed academic journal and present at national and international conferences.