Vaccination is associated with reduced mortality rates after surgery for hip fractures in the setting of recent COVID-19 infection: an observational study from the Kaiser Permanente Northern California Database.

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Title: Vaccination is associated with reduced mortality rates after surgery for hip fractures in the setting of recent COVID-19 infection: an observational study from the Kaiser Permanente Northern California Database.
Authors: Morrell AT; Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA., Kagan RP; Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA., Kelly M; Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA., Dekeyser GJ; Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA., Avins AL; Division of Research, The Permanente Medical Group, Pleasanton, CA, USA., Gigoyan LX; Division of Research, The Permanente Medical Group, Pleasanton, CA, USA., Cox JS; Department of Orthopedic Surgery, The Permanente Medical Group, Walnut Creek, CA, USA. John.S.Cox@kp.org.
Source: Acta orthopaedica [Acta Orthop] 2026 May 08; Vol. 97, pp. 286-293. Date of Electronic Publication: 2026 May 08.
Publication Type: Journal Article; Observational Study
Journal Info: Publisher: Medical Journals Sweden AB Country of Publication: Sweden NLM ID: 101231512 Publication Model: Electronic Cited Medium: Internet ISSN: 1745-3682 (Electronic) Linking ISSN: 17453674 NLM ISO Abbreviation: Acta Orthop Subsets: MEDLINE
Database: MEDLINE Ultimate
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  Data: Vaccination is associated with reduced mortality rates after surgery for hip fractures in the setting of recent COVID-19 infection: an observational study from the Kaiser Permanente Northern California Database.
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  Data: <searchLink fieldCode="AU" term="%22Morrell+AT%22">Morrell AT</searchLink>; Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA.<br /><searchLink fieldCode="AU" term="%22Kagan+RP%22">Kagan RP</searchLink>; Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA.<br /><searchLink fieldCode="AU" term="%22Kelly+M%22">Kelly M</searchLink>; Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA.<br /><searchLink fieldCode="AU" term="%22Dekeyser+GJ%22">Dekeyser GJ</searchLink>; Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA.<br /><searchLink fieldCode="AU" term="%22Avins+AL%22">Avins AL</searchLink>; Division of Research, The Permanente Medical Group, Pleasanton, CA, USA.<br /><searchLink fieldCode="AU" term="%22Gigoyan+LX%22">Gigoyan LX</searchLink>; Division of Research, The Permanente Medical Group, Pleasanton, CA, USA.<br /><searchLink fieldCode="AU" term="%22Cox+JS%22">Cox JS</searchLink>; Department of Orthopedic Surgery, The Permanente Medical Group, Walnut Creek, CA, USA. John.S.Cox@kp.org.
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  Data: <searchLink fieldCode="JN" term="%22101231512%22">Acta orthopaedica</searchLink> [Acta Orthop] 2026 May 08; Vol. 97, pp. 286-293. <i>Date of Electronic Publication: </i>2026 May 08.
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  Data: <i>Publisher: </i><searchLink fieldCode="PB" term="%22Medical+Journals+Sweden+AB%22">Medical Journals Sweden AB </searchLink><i>Country of Publication: </i>Sweden <i>NLM ID: </i>101231512 <i>Publication Model: </i>Electronic <i>Cited Medium: </i>Internet <i>ISSN: </i>1745-3682 (Electronic) <i>Linking ISSN: </i><searchLink fieldCode="IS" term="%2217453674%22">17453674 </searchLink><i>NLM ISO Abbreviation: </i>Acta Orthop <i>Subsets: </i>MEDLINE
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        Value: 10.2340/17453674.2026.45696
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              Text: 2026 May 08
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