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Therefore, we aimed to analyze psychiatric patients' length of stay (LOS) and LOS-related factors at the ED and to investigate and quantify the likelihood of being hospitalized after an emergency psychiatric evaluation. Charts of 408 individuals who sought help at the ED were retrospectively assessed to identify patients' sociodemographic and clinical data upon ED admission and discharge. All interventions performed at the ED (e.g., medications, hospitalization, clinical advice at discharge) were collected as well. The LOS for psychiatric patients was relatively short (6.5\u00a0h), and substance\/alcohol intoxication was the main factor impacting LOS. Upon ED arrival, hospitalized patients were mostly men, most often had a yellow\/severe triage code, and most often had a positive history of psychiatric illness, psychotic symptoms, euphoric mood, or suicidal ideation. Manic symptoms and suicidal ideation were the conditions most frequently leading to hospitalization. Given the paucity of real-world data on psychiatric patients\u2019 LOS and outcomes in the ED context, our findings show that psychiatric patients are evaluated in a reasonable amount of time. Their hospitalization is mostly influenced by clinical conditions rather than predisposing (e.g., age) or system-related factors (e.g., mode of arrival).<\/jats:p>","DOI":"10.1007\/s11739-021-02820-x","type":"journal-article","created":{"date-parts":[[2021,8,11]],"date-time":"2021-08-11T09:03:25Z","timestamp":1628672605000},"page":"845-855","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Psychiatric patients at the emergency department: factors associated with length of stay and likelihood of hospitalization"],"prefix":"10.1007","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1328-9678","authenticated-orcid":false,"given":"Enrica","family":"Marzola","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elisa","family":"Duranti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlotta","family":"De-Bacco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2719-1217","authenticated-orcid":false,"given":"Enrico","family":"Lupia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vincenzo","family":"Villari","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5826-5664","authenticated-orcid":false,"given":"Giovanni","family":"Abbate-Daga","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,8,11]]},"reference":[{"key":"2820_CR1","unstructured":"Di Cesare M, Magliocchetti N, Romanelli M, Santori E (2018) Rapporto salute mentale"},{"key":"2820_CR2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0154449","volume":"11","author":"H Barratt","year":"2016","unstructured":"Barratt H, Rojas-Garc\u00eda A, Clarke K et al (2016) Epidemiology of mental health attendances at emergency departments: systematic review and meta-analysis. 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