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Patients with proximal BAO were younger (66, middle 71, distal 76, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001), less often female (27.5%, middle 47.9%, distal 47.7%, <jats:italic>p<\/jats:italic>\u2009=\u20090.015), more often smokers (28.6%, middle 20.3%, distal 11.5%, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001), and fewer had atrial fibrillation (13.2%, middle 24.7%, distal 48.6%, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). Level of consciousness and NIHSS score did not differ by BAO subtype and 52.2% were alert on admission. Time from groin puncture to revascularization was significantly longer in patients with proximal BAO (71, middle 46, distal 42\u00a0min, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001), and angioplasty and\/or stenting was more often performed in patients with proximal (43.4%) and middle (27.4%) than distal (6.4%) BAO (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). Cumulative 90-day mortality was 38.6% (proximal 50.7%, middle 32.9%, distal 34.9%, <jats:italic>p<\/jats:italic>\u2009=\u20090.02). Older and pre-stroke dependent patients had higher mortality, as did patients in whom angioplasty\/stenting was performed.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>We confirm a serious outcome in BAO despite endovascular therapies, and demonstrate important differences relating to occlusion location in baseline characteristics, procedural time, therapeutic measures and outcome. Further in-depth analyses of factors affecting outcome in BAO are warranted.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00234-021-02843-3","type":"journal-article","created":{"date-parts":[[2021,10,30]],"date-time":"2021-10-30T05:03:59Z","timestamp":1635570239000},"page":"959-968","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Endovascular therapy in basilar artery occlusion in Sweden 2016\u20132019\u2014a nationwide, prospective registry study"],"prefix":"10.1007","volume":"64","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7510-431X","authenticated-orcid":false,"given":"Birgitta","family":"Ramgren","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Petrea","family":"Frid","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Norrving","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Johan","family":"Wass\u00e9lius","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Teresa","family":"Ullberg","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,10,30]]},"reference":[{"issue":"9","key":"2843_CR1","doi-asserted-by":"publisher","first-page":"1238","DOI":"10.1136\/jnnp.2004.049924","volume":"76","author":"WJ Schonewille","year":"2005","unstructured":"Schonewille WJ, Algra A, Serena J, Molina CA, Kappelle LJ (2005) Outcome in patients with basilar artery occlusion treated conventionally. 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