ArticleCJEM2021
Unidentified patients in the emergency department: a historical cohort study.
Article in CJEM, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
6 citing papers in PubMed.
- Unidentified women in emergency services: care provided in public hospital emergency services.Revista brasileira de enfermagem · 2026Article
- Unidentified but Not Unknown: Evaluating the Phonetic Naming System in a UK Trauma Centre.Cureus · 2025Article
- Article
- The problem of unconscious and unidentified patients in emergency department admissions; a 3-year retrospective study.PloS one · 2024Article
- Assessment of the incremental prognostic value from the modified frailty index-5 in complete traumatic cervical spinal cord injury.Scientific reports · 2023Article
- Evaluating the utility and challenges associated with "unknown" and fictional patients in the electronic medical record.Academic pathologyArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesTo characterize unidentified patients presenting to a single, urban emergency department (ED) in Canada. We report their demographics, ED course, post-ED discharge outcomes, and mode of identification.
methodsWe performed a retrospective chart review using descriptive analyses to assess unidentified patients admitted to Royal University Hospital and St. Paul's Hospital EDs between May 1, 2018, and April 30, 2019, in Saskatoon, Saskatchewan, Canada. We assessed demographic data, clinical presentation, mode of identification, discharge information, and major clinical outcomes.
resultsUnidentified patients were disproportionately male (64.9%), and mostly presented as Canadian Triage and Acuity Scale (CTAS) 1 (41.6%) and CTAS 2 (44.2%). Most patients arrived via emergency medical services (80.7%). The most common presenting complaints were substance misuse (33.3%) and trauma (24.6%). The average ED length of stay was 8.7 h (SD 18.6). Many patients received an inpatient consult (58.8%), and 22.3% received support services (e.g., social work). The 30-day mortality of all patients was 13.2%. Of those patients who survived to ED discharge, common dispositions included: home (36.0%), police services (3.5%), or emergency shelters (3.5%). Four (3.5%) patients returned to the hospital unidentified within the study period, and 6.7% of patients discharged from the ED returned within 48 hours.
conclusionUnidentified patients are a high-needs demographic that present mostly with substance misuse or trauma. Repeat ED attendance, sometimes as unidentified patients again, calls for initiatives that facilitate prompt identification, better discharge planning, and linkage to social supports.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.