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This paper explores characteristics associated with non\u2010fatal overdoses and aims to identify possible trends among these events in an urban area in Norway.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design and Methods<\/jats:title><jats:p>This is a retrospective analysis of non\u2010fatal overdoses from Bergen ambulance services from 2012 to 2013. Demographic, temporal and geographic data were explored.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>During the two years, 463 non\u2010fatal opioid overdoses were attended by ambulance services. Ambulance call\u2010outs occurred primarily during the late afternoon and evening hours of weekdays. Summer months had more overdoses than other seasons, with a peak in August. Overdoses were nearly twice as likely to occur in a public location in August (risk ratio 1.92, P\u2009=\u20090.042). Ambulance response times were more likely to be longer to private locations, and these victims were more likely to be treated and left at the scene. There was no difference in arrival time for drug\u2010related and non\u2010drug related dispatch.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion and Conclusions<\/jats:title><jats:p>The temporal patterns suggest that non\u2010fatal overdoses occur during non\u2010recreational time periods. The longer ambulance response time and disposition for private addresses indicate potential opportunities for peer interventions. Our analysis describes circumstances surrounding non\u2010fatal overdoses and can be useful in guiding relevant, targeted prevention interventions. [Madah\u2010Amiri D, Clausen T, Myrmel L, Bratteb\u00f8 G, Lobmaier P. Circumstances surrounding non\u2010fatal opioid overdoses attended by ambulance services. <jats:italic>Drug Alcohol Rev<\/jats:italic> 2017;36:288\u2010294]<\/jats:p><\/jats:sec>","DOI":"10.1111\/dar.12451","type":"journal-article","created":{"date-parts":[[2016,12,30]],"date-time":"2016-12-30T14:50:46Z","timestamp":1483109446000},"page":"288-294","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Circumstances surrounding non\u2010fatal opioid overdoses attended by ambulance services"],"prefix":"10.1111","volume":"36","author":[{"given":"Desiree","family":"Madah\u2010Amiri","sequence":"first","affiliation":[{"name":"The Norwegian Centre for Addiction Research The University of Oslo  Oslo Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thomas","family":"Clausen","sequence":"additional","affiliation":[{"name":"The Norwegian Centre for Addiction Research The University of Oslo  Oslo Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lars","family":"Myrmel","sequence":"additional","affiliation":[{"name":"Bergen Emergency Medical Services, Department of Anaesthesia and Intensive Care Haukeland University Hospital  Bergen Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guttorm","family":"Bratteb\u00f8","sequence":"additional","affiliation":[{"name":"Bergen Emergency Medical Services, Department of Anaesthesia and Intensive Care Haukeland University Hospital  Bergen Norway"},{"name":"Department of Clinical Medicine University of Bergen  Bergen Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philipp","family":"Lobmaier","sequence":"additional","affiliation":[{"name":"The Norwegian Centre for Addiction Research The University of Oslo  Oslo Norway"},{"name":"Division of Mental Health and Addiction Oslo University Hospital  Oslo Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2016,12,30]]},"reference":[{"key":"e_1_2_7_2_1","unstructured":"European Drug Report.Lisbon: European Monitoring Centre for Drugs and Drug Addiction 2015(cited 2015 June 5). 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