Acetylsalicylic Acid Compared with Enoxaparin for the Prevention of Thrombosis and Mechanical Ventilation in COVID-19 Patients: A Retrospective Cohort Study
Shaker Heba Wagih Abdelwahab, Shaker Wagih Shaltout, Hazem A Sayed Ahmed, Ahmed Mahmoud Fouad, Eric Merrell, Jeffrey B Riley, Rasha Salama, Ahmed Gharib Abdelrahman, Edward Darling, Ghada Fadel, Mohamed S A Elfar, Khaled Sabry, Jaffer Shah, Hossam Amin, Gary F Nieman, Adel Mishriky, Hani Aiash
Clinical Drug Investigation, doi:10.1007/s40261-021-01061-2
Background and Objective Low-dose acetylsalicylic acid (ASA, aspirin) is a well-known and frequently studied drug for primary and secondary prevention of disease due to its anti-inflammatory and coagulopathic effects. COVID-19 complications are attributed to the role of thrombo-inflammation. Studies regarding the use of low-dose ASA in COVID-19 are limited. For this reason, we propose that the use of low-dose ASA may have protective effects in COVID-19-related thromboembolism and lung injury. This study was conducted to assess the efficacy of low-dose ASA compared with enoxaparin, an anticoagulant, for the prevention of thrombosis and mechanical ventilation. Methods We conducted a retrospective cohort study on COVID-19-confirmed hospitalized patients at the Mansoura University Quarantine Hospital, outpatients, and home-isolated patients from September to December 2020 in Mansoura governorate, Egypt. Binary logistic regression analysis was used to assess the effect of ASA compared with enoxaparin on thromboembolism, and mechanical ventilation needs. Results This study included 225 COVID-19 patients. Use of ASA-only (81-162 mg orally daily) was significantly associated with reduced thromboembolism (OR 0.163, p = 0.020), but both low-dose ASA and enoxaparin, and enoxaparin-only (0.5 mg/kg subcutaneously (SC) daily as prophylactic dose or 1 mg/kg SC every 12 hours as therapeutic dose) were more protective (odds ratio [OR] 0.010, OR 0.071, respectively, p < 0.001). Neither ASA-only nor enoxaparin-only were associated with a reduction in mechanical ventilation needs. Concomitant use of low-dose ASA and enoxaparin was associated with reduced mechanical ventilation (OR 0.032, 95% CI 0.004-0.226, p = 0.001). Conclusions Low-dose ASA-only use may reduce the incidence of COVID-19-associated thromboembolism, but the reduction may be less than that of enoxaparin-only, and both ASA and enoxaparin. Concomitant use of ASA and enoxaparin demonstrates promising results with regard to the reduction of thrombotic events, and mechanical ventilation needs.
Declarations Funding No financial support was obtained from any individual, institutions, agencies, drug industries or organizations.
Competing interests The authors declare that they have no competing interests.
Ethics approval This study was approved by the Mansoura Institutional Research Board Ethics (code number: R.20.08.971), which waived the need for informed consent.
Consent to participate The Ethics Committee of Mansoura University waived the need for informed consent from the study population for the collection, analysis, and publication of the retrospectively obtained and anonymized data for this non-interventional study.
Consent to publish Not applicable. Author contributions HWA, SWS, and HASA contributed equally to this work and share first authorship. HA put the idea of the research, built the research team, designed the study, revised the manuscript, and approved the final version of manuscript. HWA and SWS participated in designing the study, collected the data, revised the manuscript, and approved the final version of manuscript. HASA participated in designing the study, wrote the manuscript draft, and approved the final version of manuscript. AMF participated in designing the study, analyzed the data, revised the manuscript, and approved the final version of manuscript. AM and AGA participated in designing the study and in statistical analysis, revised the manuscript, and approved the final version. EM, ED, JBR, GF, and GFN participated in designing..
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