Authors: Al Sulaiman K, Al Juhani O, Badreldin HA, Salah KB, Alharbi A, Arabi YM



Due to its supposed clinical efficacy, relative safety, and low cost, ascorbic acid represents an appealing option for clinicians to utilize in the context of a global health pandemic of COVID-19 patients.
The aim of this study was to evaluate the efficacy and safety of using ascorbic acid as adjunctive therapy in critically ill patients with COVID-19.
: This was a multi-center, non-interventional, retrospective cohort study. All critically ill adult patients admitted to ICU with a confirmed COVID-19 between March 1st to December 31 st , 2020 were included in the final analysis. The study was conducted at two large governmental tertiary hospitals in Saudi Arabia. The purpose was to investigate the association between clinical outcomes with ascorbic acid use as an adjunctive therapy in COVID-19 after propensity score matching using baseline severity scores, systemic use of corticosteroids and study centers.
: A 739 patients were included in this study; 296 patients were included after propensity score matching. There was no association between the administration of ascorbic acid and in-hospital mortality nor 30-day ICU mortality (OR (95%CI): 0.77 (0.476, 1.234), p-value=0.2738 and OR (95%CI): 0.73 (0.438 ,1.204), p-value=0.215 respectively). Using ascorbic acid was associated with lower incidence of thrombosis compared with the non-ascorbic acid group (6.1% vs. 13% respectively); OR (95%CI): 0.42 (0.184, 0.937), p-value=0.0342).
Ascorbic acid use as an adjunctive therapy in COVID19 critically ill patients was not associated with mortality benefits; but associated with lower incidence of thrombosis. Further studies are required to confirm these findings.

Keywords: ascorbic acid, COVID-19

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