Thrombocytopenia and clinical outcomes among patients with COVID-19 disease: A cohort study

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Abstract

Background and Aims: Thrombocytopenia is increasingly recognized among patients with critical illness and plays a role in several diseases affecting different organ systems. Therefore, we studied the prevalence of thrombocytopenia among hospitalized COVID-19 patients and its correlation with disease severity and clinical outcomes. Methods: This was an observational retrospective cohort study conducted on 256 hospitalized COVID-19 patients. Thrombocytopenia is defined as a platelet count below 150,000/μL. Disease severity was classified based on the five-point CXR scoring tool. Results: Thrombocytopenia was found in 66 (25.78%) patients. In outcomes, 41 (16%) patients were admitted to intensive care unit, 51 (19.9%) died, and 50 (19.5%) had acute kidney injury (AKI). Of the total patients with thrombocytopenia, 58 (87.9%) had early thrombocytopenia, while 8 (12.1%) had late thrombocytopenia. Notably, mean survival time was markedly decreased in late-onset thrombocytopenia cases (p < 0.0001). Patients with thrombocytopenia showed a significant increase in creatinine compared to those with normal platelet counts (p < 0.05). Moreover, thrombocytopenia was more prevalent in patients with chronic kidney disease compared to other comorbidities (p < 0.05). In addition, hemoglobin was significantly lower in the thrombocytopenia group (p < 0.05). Conclusion: Thrombocytopenia is a common finding among COVID-19 patients, with a predilection toward a specific group of patients, though the exact reasons are unclear. It predicts poor clinical outcomes and is closely linked to mortality, AKI, and the need for mechanical ventilation. These findings suggest that more research is required to study the mechanism of thrombocytopenia and the possibility of thrombotic microangiopathy in COVID-19 patients.

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Alkhalifa, H., Alsalman, Z., Alfaraj, A., Algaraash, M., & Alsalman, M. (2023). Thrombocytopenia and clinical outcomes among patients with COVID-19 disease: A cohort study. Health Science Reports, 6(2). https://doi.org/10.1002/hsr2.1111

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