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Tanaka K, Demchuk AM, Malo S, Hill MD, Holodinsky JK. Risk of stroke within 3, 7, 14, 21 and 30 days after influenza vaccination in Alberta, Canada: A population-based study. Eur J Neurol 2024; 31:e16172. [PMID: 38117538 DOI: 10.1111/ene.16172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 11/09/2023] [Accepted: 11/20/2023] [Indexed: 12/21/2023]
Abstract
BACKGROUND AND PURPOSE Influenza vaccination is associated with a longer-term protective effect against stroke; however, it has a short-term inflammatory response which may increase short-term risk of stroke. The aim was to investigate the association between influenza vaccination and short-term risk of stroke in adults. METHODS Administrative data were obtained from the Alberta Health Care Insurance Plan for all adults in Alberta, Canada, from September 2009 to December 2018. The hazard of any stroke (acute ischaemic stroke, intracerebral haemorrhage, subarachnoid haemorrhage and transient ischaemic attack) within 3, 7, 14, 21 and 30 days of influenza vaccination compared to unexposed time was analysed using Andersen-Gill Cox models, with adjustment for age, sex, anticoagulant use, atrial fibrillation, chronic obstructive pulmonary disease, diabetes, hypertension, income quintile, and rural or urban home location. RESULTS In the entire cohort consisting of 4,141,209 adults (29,687,899 person-years), 1,769,565 (42.7%) individuals received at least one vaccination. In total 38,126 stroke events were recorded with 1309 occurring within 30 days of a vaccination event. Influenza vaccination was associated with a significantly reduced hazard of stroke within 3 days (hazard ratio [HR] 0.83, 95% confidence interval [CI] 0.73-0.93), 7 days (HR 0.87, 95% CI 0.80-0.95), 14 days (HR 0.87, 95% CI 0.81-0.93), 21 days (HR 0.85, 95% CI 0.80-0.91) and 30 days (HR 0.66, 95% CI 0.65-0.68). CONCLUSIONS An increased early risk associated with vaccination was not observed. The risk of stroke was reduced at all time points within 30 days after influenza vaccination.
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Affiliation(s)
- Koji Tanaka
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Andrew M Demchuk
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Department of Radiology, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Shaun Malo
- Analytics and Performance Reporting Branch, Alberta Health, Edmonton, Canada
| | - Michael D Hill
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Department of Radiology, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Jessalyn K Holodinsky
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Department of Emergency Medicine, Cumming School of Medicine, University of Calgary, Calgary, Canada
- Centre for Health Informatics, Cumming School of Medicine, University of Calgary, Calgary, Canada
- O'Brien Institute for Public Health, Cumming School of Medicine, University of Calgary, Calgary, Canada
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Roland N, Neumann A, Hoisnard L, Duranteau L, Froelich S, Zureik M, Weill A. Use of progestogens and the risk of intracranial meningioma: national case-control study. BMJ 2024; 384:e078078. [PMID: 38537944 PMCID: PMC10966896 DOI: 10.1136/bmj-2023-078078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/22/2024] [Indexed: 04/06/2024]
Abstract
OBJECTIVE To assess the risk of intracranial meningioma associated with the use of selected progestogens. DESIGN National case-control study. SETTING French National Health Data System (ie, Système National des Données de Santé). PARTICIPANTS Of 108 366 women overall, 18 061 women living in France who had intracranial surgery for meningioma between 1 January 2009 and 31 December 2018 (restricted inclusion periods for intrauterine systems) were deemed to be in the case group. Each case was matched to five controls for year of birth and area of residence (90 305 controls). MAIN OUTCOME MEASURES Selected progestogens were used: progesterone, hydroxyprogesterone, dydrogesterone, medrogestone, medroxyprogesterone acetate, promegestone, dienogest, and intrauterine levonorgestrel. For each progestogen, use was defined by at least one dispensation within the year before the index date (within three years for 13.5 mg levonorgestrel intrauterine systems and five years for 52 mg). Conditional logistic regression was used to calculate odds ratio for each progestogen meningioma association. RESULTS Mean age was 57.6 years (standard deviation 12.8). Analyses showed excess risk of meningioma with use of medrogestone (42 exposed cases/18 061 cases (0.2%) v 79 exposed controls/90 305 controls (0.1%), odds ratio 3.49 (95% confidence interval 2.38 to 5.10)), medroxyprogesterone acetate (injectable, 9/18 061 (0.05%) v 11/90 305 (0.01%), 5.55 (2.27 to 13.56)), and promegestone (83/18 061 (0.5%) v 225/90 305 (0.2 %), 2.39 (1.85 to 3.09)). This excess risk was driven by prolonged use (≥one year). Results showed no excess risk of intracranial meningioma for progesterone, dydrogesterone, or levonorgestrel intrauterine systems. No conclusions could be drawn concerning dienogest or hydroxyprogesterone because of the small number of individuals who received these drugs. A highly increased risk of meningioma was observed for cyproterone acetate (891/18 061 (4.9%) v 256/90 305 (0.3%), odds ratio 19.21 (95% confidence interval 16.61 to 22.22)), nomegestrol acetate (925/18 061 (5.1%) v 1121/90 305 (1.2%), 4.93 (4.50 to 5.41)), and chlormadinone acetate (628/18 061 (3.5%) v 946/90 305 (1.0%), 3.87 (3.48 to 4.30)), which were used as positive controls for use. CONCLUSIONS Prolonged use of medrogestone, medroxyprogesterone acetate, and promegestone was found to increase the risk of intracranial meningioma. The increased risk associated with the use of injectable medroxyprogesterone acetate, a widely used contraceptive, and the safety of levonorgestrel intrauterine systems are important new findings.
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Affiliation(s)
- Noémie Roland
- EPI-PHARE Scientific Interest Group, French National Agency for Medicines and Health Products Safety, French National Health Insurance, Saint-Denis, France
| | - Anke Neumann
- EPI-PHARE Scientific Interest Group, French National Agency for Medicines and Health Products Safety, French National Health Insurance, Saint-Denis, France
| | - Léa Hoisnard
- EpiDermE Epidemiology in Dermatology and Evaluation of Therapeutics, EA7379, Paris Est Créteil University UPEC, Créteil, France
| | - Lise Duranteau
- Department of Medical Gynaecology, Bicêtre Hospital, Assistance Publique-Hôpitaux de Paris, Paris Saclay University, 94270, Le Kremlin-Bicêtre, France
| | - Sébastien Froelich
- Department of Neurosurgery, Lariboisière University Hospital, Paris-Cité University, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Mahmoud Zureik
- EPI-PHARE Scientific Interest Group, French National Agency for Medicines and Health Products Safety, French National Health Insurance, Saint-Denis, France
- University Versailles St-Quentin-en-Yvelines, Montigny le Bretonneux, France
| | - Alain Weill
- EPI-PHARE Scientific Interest Group, French National Agency for Medicines and Health Products Safety, French National Health Insurance, Saint-Denis, France
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Edwards KM, Griffin MR. Postmarketing Vaccine Safety Assessments: Important Work in Progress. JAMA 2024; 331:915-917. [PMID: 38502085 DOI: 10.1001/jama.2023.26630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Affiliation(s)
| | - Marie R Griffin
- School of Medicine, Vanderbilt University, Nashville, Tennessee
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Lu Y, Matuska K, Nadimpalli G, Ma Y, Duma N, Zhang HT, Chiang Y, Lyu H, Chillarige Y, Kelman JA, Forshee RA, Anderson SA. Stroke Risk After COVID-19 Bivalent Vaccination Among US Older Adults. JAMA 2024; 331:938-950. [PMID: 38502075 PMCID: PMC10951737 DOI: 10.1001/jama.2024.1059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 01/24/2024] [Indexed: 03/20/2024]
Abstract
Importance In January 2023, the US Centers for Disease Control and Prevention and the US Food and Drug Administration noted a safety concern for ischemic stroke among adults aged 65 years or older who received the Pfizer-BioNTech BNT162b2; WT/OMI BA.4/BA.5 COVID-19 bivalent vaccine. Objective To evaluate stroke risk after administration of (1) either brand of the COVID-19 bivalent vaccine, (2) either brand of the COVID-19 bivalent plus a high-dose or adjuvanted influenza vaccine on the same day (concomitant administration), and (3) a high-dose or adjuvanted influenza vaccine. Design, Setting, and Participants Self-controlled case series including 11 001 Medicare beneficiaries aged 65 years or older who experienced stroke after receiving either brand of the COVID-19 bivalent vaccine (among 5 397 278 vaccinated individuals). The study period was August 31, 2022, through February 4, 2023. Exposures Receipt of (1) either brand of the COVID-19 bivalent vaccine (primary) or (2) a high-dose or adjuvanted influenza vaccine (secondary). Main Outcomes and Measures Stroke risk (nonhemorrhagic stroke, transient ischemic attack, combined outcome of nonhemorrhagic stroke or transient ischemic attack, or hemorrhagic stroke) during the 1- to 21-day or 22- to 42-day risk window after vaccination vs the 43- to 90-day control window. Results There were 5 397 278 Medicare beneficiaries who received either brand of the COVID-19 bivalent vaccine (median age, 74 years [IQR, 70-80 years]; 56% were women). Among the 11 001 beneficiaries who experienced stroke after receiving either brand of the COVID-19 bivalent vaccine, there were no statistically significant associations between either brand of the COVID-19 bivalent vaccine and the outcomes of nonhemorrhagic stroke, transient ischemic attack, nonhemorrhagic stroke or transient ischemic attack, or hemorrhagic stroke during the 1- to 21-day or 22- to 42-day risk window vs the 43- to 90-day control window (incidence rate ratio [IRR] range, 0.72-1.12). Among the 4596 beneficiaries who experienced stroke after concomitant administration of either brand of the COVID-19 bivalent vaccine plus a high-dose or adjuvanted influenza vaccine, there was a statistically significant association between vaccination and nonhemorrhagic stroke during the 22- to 42-day risk window for the Pfizer-BioNTech BNT162b2; WT/OMI BA.4/BA.5 COVID-19 bivalent vaccine (IRR, 1.20 [95% CI, 1.01-1.42]; risk difference/100 000 doses, 3.13 [95% CI, 0.05-6.22]) and a statistically significant association between vaccination and transient ischemic attack during the 1- to 21-day risk window for the Moderna mRNA-1273.222 COVID-19 bivalent vaccine (IRR, 1.35 [95% CI, 1.06-1.74]; risk difference/100 000 doses, 3.33 [95% CI, 0.46-6.20]). Among the 21 345 beneficiaries who experienced stroke after administration of a high-dose or adjuvanted influenza vaccine, there was a statistically significant association between vaccination and nonhemorrhagic stroke during the 22- to 42-day risk window (IRR, 1.09 [95% CI, 1.02-1.17]; risk difference/100 000 doses, 1.65 [95% CI, 0.43-2.87]). Conclusions and Relevance Among Medicare beneficiaries aged 65 years or older who experienced stroke after receiving either brand of the COVID-19 bivalent vaccine, there was no evidence of a significantly elevated risk for stroke during the days immediately after vaccination.
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MESH Headings
- Aged
- Female
- Humans
- Male
- 2019-nCoV Vaccine mRNA-1273/adverse effects
- 2019-nCoV Vaccine mRNA-1273/therapeutic use
- Adjuvants, Immunologic/adverse effects
- Adjuvants, Immunologic/therapeutic use
- BNT162 Vaccine/adverse effects
- BNT162 Vaccine/therapeutic use
- COVID-19/prevention & control
- COVID-19 Vaccines/adverse effects
- COVID-19 Vaccines/therapeutic use
- Hemorrhagic Stroke/chemically induced
- Hemorrhagic Stroke/epidemiology
- Hemorrhagic Stroke/etiology
- Influenza Vaccines/adverse effects
- Influenza Vaccines/therapeutic use
- Ischemic Attack, Transient/chemically induced
- Ischemic Attack, Transient/epidemiology
- Ischemic Attack, Transient/etiology
- Medicare
- Stroke/epidemiology
- Stroke/etiology
- Stroke/prevention & control
- United States/epidemiology
- Vaccination/adverse effects
- Vaccination/methods
- Vaccines, Combined/adverse effects
- Vaccines, Combined/therapeutic use
- Centers for Disease Control and Prevention, U.S./statistics & numerical data
- United States Food and Drug Administration/statistics & numerical data
- Ischemic Stroke/chemically induced
- Ischemic Stroke/epidemiology
- Ischemic Stroke/etiology
- Influenza, Human/prevention & control
- Aged, 80 and over
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Affiliation(s)
- Yun Lu
- Center for Biologics Evaluation and Research, US Food and Drug Administration, Silver Spring, Maryland
| | | | | | - Yuxin Ma
- Acumen LLC, Burlingame, California
| | | | - Henry T Zhang
- Center for Biologics Evaluation and Research, US Food and Drug Administration, Silver Spring, Maryland
| | | | - Hai Lyu
- Acumen LLC, Burlingame, California
| | | | | | - Richard A Forshee
- Center for Biologics Evaluation and Research, US Food and Drug Administration, Silver Spring, Maryland
| | - Steven A Anderson
- Center for Biologics Evaluation and Research, US Food and Drug Administration, Silver Spring, Maryland
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Palaiodimou L. Accruing real-world data confirm that SARS-CoV-2 vaccination is not associated with stroke. J Neurol Sci 2024; 456:120850. [PMID: 37923646 DOI: 10.1016/j.jns.2023.120850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 10/22/2023] [Indexed: 11/07/2023]
Affiliation(s)
- Lina Palaiodimou
- Second Department of Neurology, National and Kapodistrian University of Athens, School of Medicine, "Attikon" University Hospital, Athens, Greece.
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Kassianos G, MacDonald P, Aloysius I, Pather S. Responses to Common Misconceptions Relating to COVID-19 Variant-Adapted mRNA Vaccines. Vaccines (Basel) 2024; 12:57. [PMID: 38250870 PMCID: PMC10819631 DOI: 10.3390/vaccines12010057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 01/02/2024] [Indexed: 01/23/2024] Open
Abstract
The evolution of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and the waning of immunity over time has necessitated the use of booster doses of original coronavirus disease 2019 (COVID-19) vaccines. This has also led to the development and implementation of variant-adapted messenger RNA (mRNA) vaccines that include an Omicron sub-lineage component in addition to the antigen based on the wild-type virus spike protein. Subsequent emergence of the recombinant XBB sub-lineages triggered the development of monovalent XBB-based variant-adapted mRNA vaccines, which are available for vaccination campaigns in late 2023. Misconceptions about new variant-adapted vaccines may exacerbate vaccine fatigue and drive the lack of vaccine acceptance. This article aims to address common concerns about the development and use of COVID-19 variant-adapted mRNA vaccines that have emerged as SARS-CoV-2 has continued to evolve.
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Affiliation(s)
- George Kassianos
- Royal College of General Practitioners, London NW1 2FB, UK;
- British Global and Travel Health Association, London NW1 2FB, UK
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Pina Vegas L, Penso L, Sbidian E, Claudepierre P. Influence of sex on the persistence of different classes of targeted therapies for psoriatic arthritis: a cohort study of 14 778 patients from the French health insurance database (SNDS). RMD Open 2023; 9:e003570. [PMID: 38114199 DOI: 10.1136/rmdopen-2023-003570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 10/02/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND Sex differences in phenotype presentation, disease trajectory and treatment response in psoriatic arthritis (PsA) have been reported. Nevertheless, whether classes of targeted therapies differentially affect men and women with PsA remains unclear. OBJECTIVES To assess the effect of sex on the long-term persistence of each class of targeted therapies in PsA. METHODS This nationwide cohort study involved the administrative healthcare database of the French health insurance scheme linked to the hospital discharge database. We included all adults with PsA who were new users of targeted therapies (not in the year before the index date) during 2015-2021 and studied all treatment lines during the study period. Persistence was defined as the time from treatment initiation to discontinuation and was estimated by the Kaplan-Meier method. Comparison of persistence by sex involved multivariate frailty models with conventional synthetic disease-modifying antirheumatic drugs and prednisone as time-dependant variables. RESULTS We included 14 778 patients with PsA who were new users of targeted therapies: 8475 (57%) women (mean age 50±13 years; 15 831 lines), 6303 (43%) men (mean age 51±13 years; 10 488 lines). Overall, 1-year persistence was 52% for women and 62% for men and at 3 years it was 27% and 39%, respectively. After adjustments, persistence was lower for women than men for inhibitors of tumour necrosis factor (TNFi) (adjusted HR (HRa) 1.4, 99% CI 1.3 to 1.5) and interleukin 17 inhibitor (IL17i) (HRa 1.2, 99% CI 1.1 to 1.3) but not IL12/23i (HRa 1.1, 99% CI 0.9 to 1.3), IL23i (HRa 1.1, 99% CI 0.7 to 1.5) or Janus kinase inhibitor (JAKi) (HRa 1.2, 99% CI 0.9 to 1.6). CONCLUSION The treatment persistence was lower for women than men for TNFi and IL17i but not for IL12/23i, IL23i or JAKi.
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Affiliation(s)
- Laura Pina Vegas
- EpiDermE, Université Paris-Est Créteil Val de Marne, Créteil, France
- Service de Rhumatologie, Hopital Henri Mondor, Créteil, France
| | - Laetitia Penso
- EpiDermE, Université Paris-Est Créteil Val de Marne, Créteil, France
| | - Emilie Sbidian
- EpiDermE, Université Paris-Est Créteil Val de Marne, Créteil, France
- Inserm, Centre d'investigation clinique 1430, Hopital Henri Mondor, Créteil, France
| | - Pascal Claudepierre
- EpiDermE, Université Paris-Est Créteil Val de Marne, Créteil, France
- Service de Rhumatologie, Hopital Henri Mondor, Créteil, France
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Bruxvoort KJ, Sy LS, Hong V, Lewin B, Qian L, Huang X, Holmquist KJ, Han B, Xu S. Factors associated with uptake of bivalent mRNA COVID-19 vaccines in a large US health care system. Vaccine 2023; 41:7460-7468. [PMID: 37953096 PMCID: PMC10954380 DOI: 10.1016/j.vaccine.2023.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/27/2023] [Accepted: 11/04/2023] [Indexed: 11/14/2023]
Abstract
BACKGROUND Bivalent mRNA COVID-19 vaccines were developed to provide protection against the original SARS-CoV-2 strain and Omicron BA.4/BA.5 variants, but uptake in the United States has been low. Sociodemographic disparities in COVID-19 vaccine uptake have been documented, but it is unclear if similar disparities persist among individuals who previously completed a primary series of monovalent COVID-19 vaccine. METHODS We conducted a retrospective cohort study at Kaiser Permanente Southern California (KPSC) including youth aged 5-17 years and adults aged ≥18 years who were KPSC members and had completed a primary series of monovalent COVID-19 vaccine. Individuals were followed from index date (date of eligibility for bivalent vaccine) to 03/31/2023 to ascertain receipt of any dose of bivalent mRNA COVID-19 vaccine or until disenrollment from KPSC or death. Multivariable robust Poisson regression was conducted to assess the adjusted relative risk and 95 % confidence intervals of factors associated with receipt of bivalent vaccine. RESULTS The final cohorts included 305,339 youth and 2,534,619 adults, of whom 19.5 % and 30.7 %, respectively, had received bivalent COVID-19 vaccine. Factors associated with being more likely to receive bivalent COVID-19 vaccine included older age, Asian race, more prior year outpatient and virtual visits, Charlson score ≥1, and immunocompromised status. Factors associated with being less likely to receive a bivalent COVID-19 vaccine included age 12-17 vs 5-11 years, Hispanic and non-Hispanic Black race/ethnicity, ≥1 prior year inpatient or emergency department visits, prior history of SARS-CoV-2 infection (adults only), Medicaid insurance, and higher neighborhood deprivation index. CONCLUSION Even among youth and adults who had previously received a primary series of monovalent COVID-19 vaccine, sociodemographic and clinical disparities were observed in receipt of bivalent COVID-19 vaccine. These findings are critical to inform equitable strategies for the implementation of the updated monovalent COVID-19 vaccine targeting the Omicron XBB strain.
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Affiliation(s)
- Katia J Bruxvoort
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL 35233, United States; Department of Research & Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles Ave, 5th Floor, Pasadena, CA 91101, United States.
| | - Lina S Sy
- Department of Research & Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles Ave, 5th Floor, Pasadena, CA 91101, United States
| | - Vennis Hong
- Department of Research & Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles Ave, 5th Floor, Pasadena, CA 91101, United States
| | - Bruno Lewin
- Department of Research & Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles Ave, 5th Floor, Pasadena, CA 91101, United States
| | - Lei Qian
- Department of Research & Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles Ave, 5th Floor, Pasadena, CA 91101, United States
| | - Xuan Huang
- Department of Research & Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles Ave, 5th Floor, Pasadena, CA 91101, United States
| | - Kimberly J Holmquist
- Department of Research & Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles Ave, 5th Floor, Pasadena, CA 91101, United States
| | - Bing Han
- Department of Research & Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles Ave, 5th Floor, Pasadena, CA 91101, United States
| | - Stanley Xu
- Department of Research & Evaluation, Kaiser Permanente Southern California, 100 S. Los Robles Ave, 5th Floor, Pasadena, CA 91101, United States; Department of Health Systems Science, Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, CA 91101, United States
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9
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Gorenflo MP, Davis PB, Kaelber DC, Xu R. Ischemic stroke after COVID-19 bivalent vaccine administration in patients aged 65 years and older in the United States. NPJ Vaccines 2023; 8:180. [PMID: 37996515 PMCID: PMC10667491 DOI: 10.1038/s41541-023-00777-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 11/06/2023] [Indexed: 11/25/2023] Open
Abstract
The Centers for Disease Control and Prevention announced in January 2023 a potential connection between administration of the Pfizer novel coronavirus disease-2019 (COVID-19) bivalent vaccine booster and ischemic stroke (IS). A retrospective cohort study was conducted to compare the hazard of IS in patients aged 65 years and over administered the Pfizer bivalent booster versus those administered the Pfizer/Moderna monovalent or Moderna bivalent boosters. De-identified patient electronic health data were collected from TriNetX, a cloud-based analytics platform that includes data from over 90 million unique patients in the United States. Patients aged 65 years and over at the time of administration of a Pfizer bivalent, Moderna bivalent, or Pfizer/Moderna monovalent booster were included for analysis. Cohorts were propensity-score matched. The hazard ratios (HR) and 95% confidence intervals (CI) for IS between matched cohorts at 1-21 and 22-42 days after booster administration were calculated. There was reduced hazard of IS in the Pfizer bivalent cohort compared to the monovalent cohort at both timepoints: 1-21 days after vaccination (HR: 0.54, 95% CI: 0.47-0.62), and 22-42 days after vaccination (HR: 0.62, 95% CI: 0.54-0.72) (n = 79,036 patients per cohort). There was reduced hazard of IS in the Pfizer bivalent cohort compared to the Moderna bivalent cohort at 1-21 days after vaccination (HR: 0.75, 95% CI: 0.58-0.96) (n = 26,962 patients per cohort). This analysis provides no evidence that the Pfizer bivalent vaccine is associated with increased hazard of IS compared to the monovalent or Moderna bivalent vaccines.
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Affiliation(s)
- Maria P Gorenflo
- Center for Artificial Intelligence in Drug Discovery, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Pamela B Davis
- Center for Community Health Integration, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - David C Kaelber
- Center for Clinical Informatics Research and Education, The MetroHealth System, and Department of Internal Medicine, Pediatrics, and Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Rong Xu
- Center for Artificial Intelligence in Drug Discovery, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
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10
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Abstract
This study investigates the association between bivalent COVID-19 vaccines and ischemic stroke, as well as the effect of simultaneous influenza vaccination on the association.
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Affiliation(s)
- Nick Andrews
- Immunisation Division, UK Health Security Agency, London, United Kingdom
| | - Julia Stowe
- Immunisation Division, UK Health Security Agency, London, United Kingdom
| | - Elizabeth Miller
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Mary Ramsay
- Immunisation Division, UK Health Security Agency, London, United Kingdom
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