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1
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Obeagu EI, Tukur M, Akaba K. Impacts of COVID-19 on hemostasis: coagulation abnormalities and management perspectives. Ann Med Surg (Lond) 2024; 86:5844-5850. [PMID: 39359765 PMCID: PMC11444586 DOI: 10.1097/ms9.0000000000002237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 05/22/2024] [Indexed: 10/04/2024] Open
Abstract
The COVID-19 pandemic caused by SARS-CoV-2 has transcended its initial characterization as a respiratory illness, revealing substantial implications for hemostasis and coagulation pathways. COVID-19-associated coagulopathies have emerged as critical determinants of disease severity and prognosis, presenting a multifaceted challenge in clinical management. This paper aims to elucidate the intricate interplay between COVID-19 and hemostasis, delving into the underlying mechanisms of coagulation abnormalities, exploring the spectrum of thrombotic complications, and discussing evolving management strategies. Therapeutic interventions and anticoagulation strategies tailored for managing COVID-19-related coagulopathies form a significant focus, encompassing prophylactic and therapeutic approaches, heparin-based therapies, and individualized treatment paradigms. This paper underscores the imperative for ongoing research endeavors to refine diagnostic modalities, identify novel therapeutic targets, and ascertain long-term sequelae of COVID-19-induced coagulation abnormalities. Ultimately, a comprehensive understanding of the intricate relationship between COVID-19 and hemostasis is pivotal in devising effective management strategies to mitigate thrombotic risks, improve clinical outcomes, and pave the way for tailored interventions in affected individuals.
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Affiliation(s)
| | - Muhammad Tukur
- Department of Science Education, Faculty of Education, Kampala International University, Kampala, Uganda
| | - Kingsley Akaba
- Department of Haematology, University of Calabar, Calabar, Cross-River State, Nigeria
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2
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Reis S, Faske A, Monsef I, Langer F, Müller OJ, Kranke P, Meybohm P, Weibel S. Anticoagulation in COVID-19 patients - An updated systematic review and meta-analysis. Thromb Res 2024; 238:141-150. [PMID: 38718472 DOI: 10.1016/j.thromres.2024.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 04/08/2024] [Accepted: 04/10/2024] [Indexed: 05/21/2024]
Abstract
BACKGROUND Thromboembolic events are common complications of COVID-19. Clinical study results on safety and efficacy of anticoagulation in COVID-19 are controversial. MATERIAL AND METHODS This report is the second update of our systematic review with meta-analysis on randomized controlled trials (RCTs) comparing standard thromboprophylaxis, intermediate or therapeutic dose anticoagulation or no anticoagulation in COVID-19 in- and outpatients. We searched eligible studies up to 5 October 2023. Certainty of evidence was assessed using GRADE. RESULTS For this update we included fourteen new RCTs and a total of 27 RCTs with 16,789 patients. Certainty of evidence ranged from very low to high depending on outcome and comparison. Standard thromboprophylaxis with low dose anticoagulation may have little or no effect for COVID-19 outpatients compared to no anticoagulation. In inpatients with moderate or severe COVID-19, intermediate dose anticoagulation may decrease any thrombotic events or death, but may increase major bleeding compared to standard thromboprophylaxis. Therapeutic dose anticoagulation decreases thrombotic events or deaths in inpatients with moderate COVID-19, but probably has little or no effect in patients with severe COVID-19 compared to standard thromboprophylaxis with low or intermediate dose anticoagulation. With therapeutic dose anticoagulation, the risk of major bleeding probably increases regardless of COVID-19 severity. We are uncertain on the effect of thromboprophylaxis with low dose anticoagulation compared to no anticoagulation in the post-discharge setting. CONCLUSIONS Hospitalized, moderately-ill COVID-19 patients may benefit from intermediate or therapeutic dose anticoagulation, while critically ill patients may not. Risk of major bleeding must be considered.
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Affiliation(s)
- Stefanie Reis
- University Hospital Würzburg, Department for Anaesthesiology, Intensive Care, Emergency and Pain Medicine, Würzburg, Germany
| | - Amon Faske
- University Hospital Würzburg, Department for Anaesthesiology, Intensive Care, Emergency and Pain Medicine, Würzburg, Germany
| | - Ina Monsef
- Cochrane Haematology, Institute of Population Health, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Florian Langer
- II. Medical Clinic and Polyclinic, University Medical Center Eppendorf, Hamburg, Germany
| | - Oliver J Müller
- Dept. of Internal Medicine V, University Hospital Schleswig-Holstein, German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Peter Kranke
- University Hospital Würzburg, Department for Anaesthesiology, Intensive Care, Emergency and Pain Medicine, Würzburg, Germany
| | - Patrick Meybohm
- University Hospital Würzburg, Department for Anaesthesiology, Intensive Care, Emergency and Pain Medicine, Würzburg, Germany
| | - Stephanie Weibel
- University Hospital Würzburg, Department for Anaesthesiology, Intensive Care, Emergency and Pain Medicine, Würzburg, Germany.
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Poloni A, Casalini G, Pozza G, Giacomelli A, Colaneri M, Carrozzo G, Caloni B, Ciubotariu CL, Zacheo M, Rabbione A, Pieruzzi M, Barone F, Passerini M, Ridolfo AL, Rizzardini G, Gori A, Antinori S. Major Bleeding Events in Hospitalized COVID-19 Patients: A Retrospective Observational Study. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:814. [PMID: 38792997 PMCID: PMC11122796 DOI: 10.3390/medicina60050814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/08/2024] [Accepted: 05/14/2024] [Indexed: 05/26/2024]
Abstract
Thromboprophylaxis/anticoagulation treatment is often required in hospitalized COVID-19 patients. We aimed to estimate the prevalence of major bleeding events in hospitalized COVID-19 patients. This was a retrospective observational study including all COVID-19 hospitalized patients ≥18 years of age at one reference center in northern Italy. The crude prevalence (between February 2020-2022) of major bleeding events was estimated as the number of major bleeding episodes divided by patients at risk. Uni- and multivariable Cox models were built to assess factors potentially associated with major bleeding events. Twenty-nine (0.98%) out of 2,945 COVID-19 patients experienced a major bleeding event [prevalence of 0.55% (95%CI 0.37-0.79)], of which five were fatal. Patients who experienced a major bleeding event were older [78 years (72-84 IQR) vs. 67 years (55-78 IQR), p-value < 0.001] and more frequently exposed to anti-aggregating therapy (44.8% vs. 20.0%, p-value 0.002) when compared to those who did not. In the multivariable Cox model, age [per 1 year more AHR 1.05 (CI95% 1.02-1.09)] was independently associated with an increased risk of major bleeding events. A strict monitoring of older hospitalized COVID-19 patients is warranted due to the risk of major bleeding events.
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Affiliation(s)
- Andrea Poloni
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Giacomo Casalini
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Giacomo Pozza
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Andrea Giacomelli
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Marta Colaneri
- II Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (M.C.); (M.P.)
| | - Giorgia Carrozzo
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Beatrice Caloni
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Cosmin Lucian Ciubotariu
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Martina Zacheo
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Andrea Rabbione
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Margherita Pieruzzi
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Federico Barone
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Matteo Passerini
- II Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (M.C.); (M.P.)
| | - Anna Lisa Ridolfo
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
| | - Giuliano Rizzardini
- I Division of Infectious Diseases, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy;
| | - Andrea Gori
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- II Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (M.C.); (M.P.)
- Centre for Multidisciplinary Research in Health Science (MACH), Università degli Studi di Milano, 20122 Milan, Italy
| | - Spinello Antinori
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20122 Milan, Italy; (A.P.); (G.P.); (G.C.); (B.C.); (C.L.C.); (M.Z.); (A.R.); (M.P.); (F.B.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy; (G.C.); (A.L.R.)
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Ferrandis R, Sierra P, Gomez-Luque A. COVID-19 thromboprophylaxis. New evidence. REVISTA ESPANOLA DE ANESTESIOLOGIA Y REANIMACION 2024; 71:34-47. [PMID: 37678450 DOI: 10.1016/j.redare.2022.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/17/2022] [Indexed: 09/09/2023]
Abstract
Recent publications have questioned the efficacy of using therapeutic or intermediate doses of low molecular weight heparin (LMWH) in COVID-19 patients, especially in the most severe patients. In order to update these recommendations, a non-systematic review has been carried out in the main medical databases. A total of 14 randomized clinical trials, 14 meta-analyses and the recommendations of 12 scientific societies were selected, stratified according to the type of patient (outpatient, hospitalized, admitted to critical care or post-discharge). The efficacy of LMWH and other therapeutic approaches (rivaroxaban, apixaban, sulodexide, acetylsalicylic acid and P2Y12 inhibitors) has been analyzed. The findings recommend using standard doses of LMWH as thromboprophylaxis in critically hospitalized COVID-19 patients and therapeutic doses in non-critically hospitalized patients if the risk of bleeding is low. In outpatients and those discharged from the hospital, LMWH could be used at a prophylactic dose if there are thrombotic risk factors, and the bleeding risk is low. It is not recommended to associate antiplatelet agents with LMWH unless previously indicated.
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Affiliation(s)
- R Ferrandis
- Servicio de Anestesiología-Reanimación y Terapéutica del Dolor, Hospital Universitari i Politècnic La Fe, SEDAR, Valencia, Spain; SEDAR Haemostasis, Transfusion Medicine and Fluid Therapy Division, Valencia, Spain
| | - P Sierra
- Servicio de Anestesiología-Reanimación y Terapéutica del Dolor, Hospital Universitario Virgen de la Victoria, SEDAR, Málaga, Spain; Servicio de Anestesiología-Reanimación y Terapéutica del Dolor, Fundació Puigvert, SEDAR, Barcelona, Spain
| | - A Gomez-Luque
- SEDAR Haemostasis, Transfusion Medicine and Fluid Therapy Division, Valencia, Spain; Servicio de Anestesiología-Reanimación y Terapéutica del Dolor, Hospital Universitario Virgen de la Victoria, SEDAR, Málaga, Spain.
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5
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Reis S, Popp M, Schießer S, Metzendorf MI, Kranke P, Meybohm P, Weibel S. Anticoagulation in COVID-19 patients - An updated systematic review and meta-analysis. Thromb Res 2022; 219:40-48. [PMID: 36113402 PMCID: PMC9451936 DOI: 10.1016/j.thromres.2022.09.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/30/2022] [Accepted: 09/03/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND Thromboembolic events are common complications of COVID-19. Clinical study results on safety and efficacy of anticoagulation in COVID-19 are controversial. MATERIAL AND METHODS This report updates our systematic review and random-effects meta-analysis on randomized controlled trials (RCTs) comparing standard prophylactic anticoagulation and intermediate or therapeutic anticoagulation in COVID-19 patients. We searched eligible studies for the update up to 4 February 2022 by weekly monitoring of RCTs in the Cochrane COVID-19 Study Register. Certainty of evidence was assessed using GRADE (Grading of Recommendations Assessment, Development and Evaluation). RESULTS For this update we included five new trials; a total of 13 RCTs with 7364 patients. Certainty of evidence was very low to low. We are uncertain whether low-dose prophylactic anticoagulation is favoured over placebo or no anticoagulation in the outpatient- or post-discharge-setting. In hospitalized patients with moderate and severe COVID-19, intermediate-dose anticoagulation may have little or no effect on thrombotic events or death (RR 1.03, 95 % CI 0.86-1.24), but may increase severe bleeding non-significantly (RR 1.48, 95 % CI 0.53-4.15). Therapeutic-dose anticoagulation may decrease thrombotic events or deaths in hospitalized patients with moderate COVID-19 (RR 0.64, 95 % CI 0.38-1.07; fixed-effect model RR 0.72, 95 % CI 0.57-0.91), but may have little or no effect in patients with severe disease (RR 0.98, 95 % CI 0.86-1.12). With therapeutic-dose anticoagulation, the risk of major bleeding may increase regardless of COVID-19 severity (RR 1.78, 95 % CI 1.15-2.74). CONCLUSIONS Hospitalized, moderately ill COVID-19 patients may benefit from therapeutic-dose anticoagulation, while critically ill patients may not. Risk of major bleeding must be considered.
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Affiliation(s)
- Stefanie Reis
- Department for Anesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, 97080 Würzburg, Germany
| | - Maria Popp
- Department for Anesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, 97080 Würzburg, Germany
| | - Selina Schießer
- Department for Anesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, 97080 Würzburg, Germany
| | - Maria-Inti Metzendorf
- Institute of General Practice, Faculty of Medicine, Heinrich Heine University Düsseldorf, 40227 Düsseldorf, Germany
| | - Peter Kranke
- Department for Anesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, 97080 Würzburg, Germany
| | - Patrick Meybohm
- Department for Anesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, 97080 Würzburg, Germany
| | - Stephanie Weibel
- Department for Anesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, 97080 Würzburg, Germany.
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6
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Vergidis P, Levy ER, Ristagno EH, Iyer VN, O'Horo JC, Joshi AY. COVID-19 in patients with B cell immune deficiency. J Immunol Methods 2022; 510:113351. [PMID: 36087764 PMCID: PMC9450485 DOI: 10.1016/j.jim.2022.113351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/22/2022] [Accepted: 09/02/2022] [Indexed: 12/31/2022]
Abstract
This article aims to describe the clinical manifestations and management of COVID-19 in patients with primary and secondary B cell deficient states. We describe the epidemiologic and clinical features as well as unique management paradigm including isolation precautions with COVID-19. We then focus upon primary and secondary preventive approaches including vaccination and pre- as well as post-exposure prophylaxis. Further, we elaborate upon the important disease specific risk factors in these patients and the need to conduct prospective clinical trials to develop individualized management strategies in this population.
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Affiliation(s)
- Paschalis Vergidis
- Division of Public Health, Infectious Diseases and Occupational Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - Emily R. Levy
- Division of Pediatric Critical Care Medicine, Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA,Division of Pediatric Infectious Diseases, Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA
| | - Elizabeth H. Ristagno
- Division of Pediatric Infectious Diseases, Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA
| | - Vivek N. Iyer
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, USA
| | - John C. O'Horo
- Division of Public Health, Infectious Diseases and Occupational Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, USA,Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, USA
| | - Avni Y. Joshi
- Division of Pediatric and Adult Allergy and Immunology, Mayo Clinic, Rochester, MN, USA,Corresponding author at: Mayo Clinic Childrens Center, 200 First Street SW, Rochester, MN 55905, USA
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Kham NI, Shahid R, Naik SS, Ramphall S, Rijal S, Prakash V, Ekladios H, Mulayamkuzhiyil Saju J, Mandal N, Balani P. The Comparison of Therapeutic With Prophylactic Anticoagulation on Mortality, Risk of Bleeding, and Thromboembolism in Hospitalized Patients With COVID-19: A Systematic Review. Cureus 2022; 14:e29932. [PMID: 36381788 PMCID: PMC9635931 DOI: 10.7759/cureus.29932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/04/2022] [Indexed: 11/07/2022] Open
Abstract
Thromboembolism is one of the most severe manifestations of coronavirus disease 2019 (COVID-19). Thrombotic complications have been reported even with the administration of thromboprophylaxis. This has led many experts to have variable opinions on the most effective prophylactic strategy and to anticipate the discovery of the ideal dosing of anticoagulation to reduce thromboembolic events and related mortality. We performed a systematic review to evaluate whether therapeutic-dose anticoagulation is superior to prophylactic-dose anticoagulation by comparing mortality rates, bleeding risks, and rates of thromboembolism. We adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines to create our systematic review. Twenty-two records were collected from PubMed, PubMed Central (PMC), and Medical Literature Analysis and Retrieval System Online (MEDLINE), after which they undertook quality appraisals. A total of 124 studies were analyzed in six systematic reviews and meta-analyses, one pooled analysis, two multicenter retrospective cohort studies, one observational study, one retrospective chart review, one evidence-based protocol, and four narrative reviews.
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Affiliation(s)
- Nang I Kham
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
- Hospital Medicine, University of Medicine 1, Yangon, MMR
| | - Rabia Shahid
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
| | - Shaili S Naik
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
- Internal Medicine, Surat Municipal Institute of Medical Education and Research (SMIMER) Hospital and Medical College, Surat, IND
| | - Shivana Ramphall
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
- Research, American University of Antigua, Osbourn, ATG
| | - Swarnima Rijal
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
| | - Vishakh Prakash
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
- Internal Medicine, Government Medical College, Kozhikode, IND
| | - Heba Ekladios
- Psychiatry, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
| | - Jiya Mulayamkuzhiyil Saju
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
- General Surgery, Government Medical College, Trivandrum, IND
- Internal Medicine, Sree Narayana Institute of Medical Sciences, Ernakulam, IND
| | - Naishal Mandal
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
- Internal Medicine, Surat Municipal Institute of Medical Education and Research (SMIMER) Hospital and Medical College, Surat, IND
| | - Prachi Balani
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
- Internal Medicine, Saint Vincent Hospital, Worcester, USA
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8
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Cuker A, Tseng EK, Schünemann HJ, Angchaisuksiri P, Blair C, Dane K, DeSancho MT, Diuguid D, Griffin DO, Kahn SR, Klok FA, Lee AI, Neumann I, Pai A, Righini M, Sanfilippo KM, Siegal DM, Skara M, Terrell DR, Touri K, Akl EA, Al Jabiri R, Al Jabiri Y, Boulos M, Brignardello-Petersen R, Charide R, Colunga-Lozano LE, Dearness K, Darzi AJ, Karam SG, Morgano GP, Morsi RZ, Philip BA, Benitez YR, Stevens A, Solo K, Wiercioch W, Mustafa RA, Nieuwlaat R. American Society of Hematology living guidelines on the use of anticoagulation for thromboprophylaxis for patients with COVID-19: March 2022 update on the use of anticoagulation in critically ill patients. Blood Adv 2022; 6:4975-4982. [PMID: 35748885 PMCID: PMC9236618 DOI: 10.1182/bloodadvances.2022007940] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 06/13/2022] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND COVID-19-related critical illness is associated with an increased risk of venous thromboembolism (VTE). OBJECTIVE These evidence-based guidelines of the American Society of Hematology (ASH) are intended to support patients, clinicians, and other health care professionals in decisions about the use of anticoagulation for patients with COVID-19. METHODS ASH formed a multidisciplinary guideline panel, including 3 patient representatives, and applied strategies to minimize potential bias from conflicts of interest. The McMaster University Grading of Recommendations Assessment, Development and Evaluation (GRADE) Centre supported the guideline development process, including performing systematic evidence reviews (up to January 2022). The panel prioritized clinical questions and outcomes according to their importance for clinicians and patients. The panel used the GRADE approach to assess evidence and make recommendations, which were subject to public comment. This is an update to guidelines published in February 2021 and May 2021 as part of the living phase of these guidelines. RESULTS The panel made 1 additional recommendation: a conditional recommendation for the use of prophylactic-intensity over therapeutic-intensity anticoagulation for patients with COVID-19-related critical illness who do not have suspected or confirmed VTE. The panel emphasized the need for an individualized assessment of thrombotic and bleeding risk. CONCLUSIONS This conditional recommendation was based on very low certainty in the evidence, underscoring the need for additional, high-quality, randomized controlled trials comparing different intensities of anticoagulation for patients with COVID-19-related critical illness.
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Affiliation(s)
- Adam Cuker
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Eric K. Tseng
- Division of Hematology/Oncology; St. Michael’s Hospital, University of Toronto, Toronto, ON, Canada
| | - Holger J. Schünemann
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
- Institut für Evidence in Medicine, Medical Center & Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Pantep Angchaisuksiri
- Division of Hematology, Department of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | | | - Kathryn Dane
- Department of Pharmacy, The Johns Hopkins Hospital, Baltimore, MD
| | - Maria T. DeSancho
- Division of Hematology-Oncology, Department of Medicine, Weill Cornell Medicine, New York Presbyterian Hospital, New York, NY
| | | | - Daniel O. Griffin
- Division of Infectious Diseases, College of Physicians & Surgeons of Columbia University, New York, NY
- Research and Development at United Health Group, Minnetonka, MN
- Prohealth NY, Lake Success, NY
| | - Susan R. Kahn
- Department of Medicine, McGill University, Montreal, QC, Canada
| | - Frederikus A. Klok
- Department of Medicine–Thrombosis and Hemostasis, Leiden University Medical Center, Leiden, the Netherlands
| | - Alfred Ian Lee
- Section of Hematology, Yale School of Medicine, New Haven, CT
| | - Ignacio Neumann
- Escuela de Medicina, Facultad de Medicina y Ciencia, Universidad San Sebastian, Santiago, Chile
| | - Ashok Pai
- Division of Hematology & Oncology, Kaiser Permanente, Oakland/Richmond, CA
| | - Marc Righini
- Division of Angiology and Hemostasis, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | | | - Deborah M. Siegal
- Department of Medicine and the Ottawa Hospital Research Institute, University of Ottawa, Ottawa, ON, Canada
| | | | - Deirdra R. Terrell
- Department of Biostatistics and Epidemiology, Hudson College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | | | - Elie A. Akl
- Department of Internal Medicine, American University of Beirut, Beirut, Lebanon
| | | | | | - Mary Boulos
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Romina Brignardello-Petersen
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Rana Charide
- Clinical Research Institute, American University of Beirut, Beirut, Lebanon
| | - Luis E. Colunga-Lozano
- Department of Clinical Medicine, Health Science Center, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Karin Dearness
- Library Services, St. Joseph’s Healthcare Hamilton, Hamilton, ON, Canada
| | - Andrea J. Darzi
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Samer G. Karam
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Gian Paolo Morgano
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Rami Z. Morsi
- Department of Neurology, University of Chicago, Chicago, IL; and
| | - Binu A. Philip
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Yetiani Roldan Benitez
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Adrienne Stevens
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Karla Solo
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Wojtek Wiercioch
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
| | - Reem A. Mustafa
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
- Department of Internal Medicine, Division of Nephrology, University of Kansas Medical Center, Kansas City, KS
| | - Robby Nieuwlaat
- Department of Health Research Methods, Evidence, and Impact, Michael G. DeGroote Cochrane Canada and GRADE Centres, McMaster University, Hamilton, ON, Canada
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9
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Kovács EH, Tánczos K, Szabó L, Turan C, Dembrovszky F, Ocskay K, Lee BY, Hegyi P, Molnár Z. Higher Dose Anticoagulation Cannot Prevent Disease Progression in COVID-19 Patients: A Systematic Review and Meta-Analysis. Biomedicines 2022; 10:2194. [PMID: 36140295 PMCID: PMC9496532 DOI: 10.3390/biomedicines10092194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 08/30/2022] [Accepted: 08/31/2022] [Indexed: 11/29/2022] Open
Abstract
Implementation of higher dose (HD) thromboprophylaxis has been considered in patients infected with coronavirus disease 2019 (COVID-19). Our aim was to compare HD to standard dose (SD) thromboprophylaxis in COVID-19 patients. The protocol is registered on PROSPERO (CRD42021284808). We searched for randomised controlled studies (CENTRAL, Embase, Medline and medRxviv) that compared HD to SD anticoagulation in COVID-19 and analysed outcomes such as mortality, thrombotic events, bleedings, and disease progression. The statistical analyses were made using the random effects model. Fourteen articles were included (6253 patients). HD compared with SD showed no difference in mortality (OR 0.83 [95% CI 0.54−1.28]). The use of HD was associated with a decreased risk of thrombosis (OR 0.58 [95% CI 0.44−0.76]), although with an increased risk of major bleeding (OR 1.64 [95% CI 1.25−2.16]). The cohort with D-dimer < 1 mg/mL showed no effect (OR 1.19 [95% CI 0.67−2.11]), but in the case of D-dimer > 1 mg/mL, a tendency of lower risk in the HD group was observed (OR 0.56 [95% CI 0.31−1.00]). The need for intubation in moderately ill patients showed a nonsignificant lower likelihood in the HD group (OR 0.82 [95% CI 0.63−1.08]). We cannot advocate for HD in all COVID-19 patients, although it shows some nonsignificant benefits on disease progression in those with elevated D-dimer who do not need ICU admission.
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Affiliation(s)
- Emőke Henrietta Kovács
- Centre for Translational Medicine, Semmelweis University, 1085 Budapest, Hungary
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1085 Budapest, Hungary
- Selye János Doctoral College for Advanced Studies, Semmelweis University, 1085 Budapest, Hungary
| | - Krisztián Tánczos
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1085 Budapest, Hungary
| | - László Szabó
- Centre for Translational Medicine, Semmelweis University, 1085 Budapest, Hungary
- Institute for Translational Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Caner Turan
- Centre for Translational Medicine, Semmelweis University, 1085 Budapest, Hungary
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1085 Budapest, Hungary
| | - Fanni Dembrovszky
- Centre for Translational Medicine, Semmelweis University, 1085 Budapest, Hungary
- Institute for Translational Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Klementina Ocskay
- Centre for Translational Medicine, Semmelweis University, 1085 Budapest, Hungary
- Institute for Translational Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Bo-Young Lee
- Centre for Translational Medicine, Semmelweis University, 1085 Budapest, Hungary
| | - Péter Hegyi
- Centre for Translational Medicine, Semmelweis University, 1085 Budapest, Hungary
- Institute for Translational Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
- Division of Pancreatic Diseases, Heart and Vascular Center, Semmelweis University, 1085 Budapest, Hungary
| | - Zsolt Molnár
- Centre for Translational Medicine, Semmelweis University, 1085 Budapest, Hungary
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1085 Budapest, Hungary
- Department of Anaesthesiology and Intensive Therapy, Faculty of Medicine, Poznan University of Medical Sciences, 61-701 Poznan, Poland
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10
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Pilia E, Belletti A, Fresilli S, Finco G, Landoni G. Efficacy and safety of heparin full-dose anticoagulation in hospitalized non-critically ill COVID-19 patients: a meta-analysis of multicenter randomized controlled trials. J Thromb Thrombolysis 2022; 54:420-430. [PMID: 35922578 PMCID: PMC9362611 DOI: 10.1007/s11239-022-02681-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/04/2022] [Indexed: 12/24/2022]
Abstract
Arterial and venous thrombotic events in COVID-19 cause significant morbidity and mortality among patients. Although international guidelines agree on the need for anticoagulation, it is unclear whether full-dose heparin anticoagulation confers additional benefits over prophylactic-dose anticoagulation. This systematic review and meta-analysis aimed to investigate the efficacy and safety of heparin full-dose anticoagulation in hospitalized non-critically ill COVID-19 patients. We searched Pubmed/Medline, EMBASE, Clinicaltrials.gov, medRxiv.org and Cochrane Central Register of clinical trials dated up to April 2022. Randomized controlled trials (RCTs) comparing full-dose heparin anticoagulation to prophylactic-dose anticoagulation or standard treatment in hospitalized non-critically ill COVID-19 patients were included in our pooled analysis. The primary endpoint was the rate of major thrombotic events and the co-primary endpoint was the rate of major bleeding events. We identified 4 studies, all of them multicenter, randomizing 2926 patients. Major thrombotic events were 23/1524 (1.5%) in full-dose heparin anticoagulation versus 57/1402 (4.0%) in prophylactic-dose [relative risk (RR) 0.39; 95% confidence interval (CI) 0.25–0.62; p˂0.01; I2 = 0%]. Clinical relevant bleeding events occurred in 1.7% (26/1524) among patients treated with heparin full anticoagulation dose compared to 1.1% (15/1403) in prophylactic-dose group (RR 1.60; 95% CI 0.85–3.03; p = 0.15; I2 = 20%). Mortality was 6.6% (101/1524) versus 8.6% (121/1402) (RR 0.63; 95% CI 0.33–1.19; p = 0.15). In this meta-analysis of high quality multicenter randomized trials, full-dose anticoagulation with heparin was associated with lower rate of major thrombotic events without differences in bleeding risk and mortality in hospitalized non critically ill COVID-19 patients. Study registration PROSPERO, review no. CRD42022301874.
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Affiliation(s)
- Eros Pilia
- Department of Medical Science and Public Health, University of Cagliari, Cagliari, Italy.,Department of Anesthesia, Resuscitation and Pain Therapy, University of Cagliari, Cagliari, Italy
| | - Alessandro Belletti
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Stefano Fresilli
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Gabriele Finco
- Department of Medical Science and Public Health, University of Cagliari, Cagliari, Italy.,Department of Anesthesia, Resuscitation and Pain Therapy, University of Cagliari, Cagliari, Italy
| | - Giovanni Landoni
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy. .,School of Medicine, Vita-Salute San Raffaele University, Milan, Italy.
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11
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Thomas MR, Scully M. Clinical features of thrombosis and bleeding in COVID-19. Blood 2022; 140:184-195. [PMID: 35452509 PMCID: PMC9040438 DOI: 10.1182/blood.2021012247] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 04/13/2022] [Indexed: 01/08/2023] Open
Abstract
Infection with the SARS-CoV-2 virus, resulting in COVID-19 disease, has presented a unique scenario associated with high rates of thrombosis. The risk of venous thrombosis is some three- to sixfold higher than for patients admitted to a hospital for other indications, and for patients who have thrombosis, mortality appears to increase. Thrombosis may be a presenting feature of COVID-19. Pulmonary thrombi are the most frequent events, some related to deep vein thrombosis, but also to in situ microvascular and macrovascular thrombosis. Other venous thromboses include catheter- and circuit-associated in patients requiring hemofiltration and extracorporeal membrane oxygenation. Arterial thrombosis is less commonly documented, with 3% of patients in intensive care units having major arterial strokes and up to 9% having myocardial infarction, both of which are most likely multifactorial. Risk factors for thrombosis above those already documented in hospital settings include duration of COVID-19 symptoms before admission to the hospital. Laboratory parameters associated with higher risk of thrombosis include higher D-dimer, low fibrinogen, and low lymphocyte count, with higher factor VIII and von Willebrand factor levels indicative of more severe COVID-19 infection. All patients should receive thromboprophylaxis when admitted with COVID-19 infection, but the dose and length of treatment are still debated. Thrombosis continues to be treated according to standard VTE guidelines, but adjustments may be needed depending on other factors relevant to the patient's admission.
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Affiliation(s)
- Mari R Thomas
- Department of Haematology, University College London Hospital (UCLH), London, United Kingdom; and
- Cardiometabolic Programme, National Institute for Health and Care Research (NIHR), UCLH, University College London Biomedical Research Centre (BRC), London, United Kingdom
| | - Marie Scully
- Department of Haematology, University College London Hospital (UCLH), London, United Kingdom; and
- Cardiometabolic Programme, National Institute for Health and Care Research (NIHR), UCLH, University College London Biomedical Research Centre (BRC), London, United Kingdom
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12
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Wills NK, Nair N, Patel K, Sikder O, Adriaanse M, Eikelboom J, Wasserman S. Efficacy and safety of intensified versus standard prophylactic anticoagulation therapy in patients with Covid-19: a systematic review and meta-analysis. Open Forum Infect Dis 2022; 9:ofac285. [PMID: 35859991 PMCID: PMC9214161 DOI: 10.1093/ofid/ofac285] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 06/01/2022] [Indexed: 11/30/2022] Open
Abstract
Background Randomized controlled trials (RCTs) have reported inconsistent effects from intensified anticoagulation on clinical outcomes in coronavirus disease 2019 (COVID-19). We performed an aggregate data meta-analysis from available trials to quantify effect on nonfatal and fatal outcomes and identify subgroups who may benefit. Methods We searched multiple databases for RCTs comparing intensified (intermediate or therapeutic dose) vs prophylactic anticoagulation in adults with laboratory-confirmed COVID-19 through 19 January 2022. We used random-effects meta-analysis to estimate pooled risk ratios for mortality, thrombotic, and bleeding events (at end of follow-up or discharge) and performed subgroup analysis for clinical setting and dose of intensified anticoagulation. Results Eleven RCTs were included (N = 5873). Intensified vs prophylactic anticoagulation was not associated with a mortality reduction up to 45 days (risk ratio [RR], 0.93 [95% confidence interval {CI}, .79–1.10]). There was a possible signal of mortality reduction for non–intensive care unit (ICU) patients, although with low precision and high heterogeneity (5 studies; RR, 0.84 [95% CI, .49–1.44]; I2 = 75%). Risk of venous thromboembolism was reduced (RR, 0.53 [95% CI, .41–.69]; I2 = 0%), with effect driven by therapeutic rather than intermediate dosing (interaction P = .04). Major bleeding was increased with intensified anticoagulation (RR, 1.73 [95% CI, 1.17–2.56]) with no interaction for dosing and clinical setting. Conclusions Intensified anticoagulation has no effect on mortality among hospitalized adults with COVID-19 and is associated with increased bleeding risk. The observed reduction in venous thromboembolism risk and trend toward reduced mortality in non-ICU settings requires exploration in additional RCTs. Clinical Trials Registration. CRD42021273449 (PROSPERO).
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Affiliation(s)
- Nicola K Wills
- University of Cape Town Department of Medicine, , Cape Town, South Africa
| | - Nikhil Nair
- McMaster University Michael G. DeGroote School of Medicine, , Hamilton, Ontario, Canada
| | - Kashyap Patel
- University of Ottawa School of Medicine, , Ottawa, Ontario, Canada
| | - Omaike Sikder
- McMaster University Michael G. DeGroote School of Medicine, , Hamilton, Ontario, Canada
| | | | - John Eikelboom
- McMaster University Michael G. DeGroote School of Medicine, , Hamilton, Ontario, Canada
| | - Sean Wasserman
- University of Cape Town Division of Infectious Diseases and HIV Medicine, Department of Medicine, , Cape Town, South Africa
- University of Cape Town Welcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, , Cape Town, South Africa
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13
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Wills NK, Nair N, Patel K, Sikder O, Adriaanse M, Eikelboom J, Wasserman S. Efficacy and safety of intensified versus standard prophylactic anticoagulation therapy in patients with Covid-19: a systematic review and meta-analysis. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2022:2022.03.05.22271947. [PMID: 35291298 PMCID: PMC8923119 DOI: 10.1101/2022.03.05.22271947] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Background Randomised controlled trials (RCTs) have reported inconsistent effects from intensified anticoagulation on clinical outcomes in Covid-19. We performed an aggregate data meta-analysis from available trials to quantify effect on non-fatal and fatal outcomes and identify subgroups who may benefit. Methods We searched multiple databases for RCTs comparing intensified (intermediate or therapeutic dose) versus standard prophylactic dose anticoagulation in adults with laboratory-confirmed Covid-19 through 19 January 2022. The primary efficacy outcome was all-cause mortality at end of follow-up or discharge. We used random effects meta-analysis to estimate pooled risk ratios for mortality, thrombotic, and bleeding events, and performed subgroup analysis for clinical setting and dose of intensified anticoagulation. Results Eleven RCTs were included (n = 5873). Intensified anticoagulation was not associated with a reduction in mortality for up to 45 days compared with prophylactic anticoagulation: 17.5% (501/2861) died in the intensified anticoagulation group and 18.8% (513/2734) died in the prophylactic anticoagulation group, relative risk (RR) 0.93; 95%CI, 0.79 - 1.10. On subgroup analysis, there was a possible signal of mortality reduction for inpatients admitted to general wards, although with low precision and high heterogeneity (5 studies; RR 0.84; 95% CI, 0.49 - 1.44; I 2 = 75%) and not significantly different to studies performed in the ICU (interaction P = 0.51). Risk of venous thromboembolism was reduced with intensified anticoagulation compared with prophylaxis (8 studies; RR 0.53, 95%CI 0.41 - 0.69; I 2 = 0%). This effect was driven by therapeutic rather than intermediate dosing on subgroup analysis (interaction P =0.04). Major bleeding was increased with use of intensified anticoagulation (RR 1.73, 95% CI 1.17 - 2.56) with no interaction for dosing and clinical setting. Conclusion Intensified anticoagulation has no effect on short term mortality among hospitalised adults with Covid-19 and is associated with increased risk of bleeding. The observed reduction in venous thromboembolism risk and trend towards reduced mortality in non-ICU hospitalised patients requires exploration in additional RCTs. Summary In this aggregate data meta-analysis, use of intensified anticoagulation had no effect on short term mortality among hospitalised adults with Covid-19 and was associated with increased risk of bleeding.
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Affiliation(s)
- Nicola K Wills
- Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Nikhil Nair
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Kashyap Patel
- School of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Omaike Sikder
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | | | - John Eikelboom
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Sean Wasserman
- School of Medicine, University of Ottawa, Ottawa, Ontario, Canada
- Division of Infectious Diseases and HIV Medicine, Department of Medicine, University of Cape Town, Cape Town, South Africa
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