By Pooja Toshniwal PahariaAug 14 2023Reviewed by Sophia Coveney In a recent study published in Scientific Reports, researchers performed a meta-analysis to evaluate the impact of convalescent serum therapy on all-cause mortality among coronavirus disease 2019 patients.
Convalescent serum treatment is a passive type of immunization in which serum from a previously recovered patient is transfused into a currently ill individual suffering from that disease. The antibodies by the convalescent individual confer humoral immunity to the ill individual. The Cochrane Library, PubMed, Google Scholar, and Medline were searched for high-quality and peer-reviewed full-text RCTs published in English and including hospitalized adult COVID-19 patients. The initial and subsequent data searches were conducted on 15 September 2021 and 29 January 2022, respectively. Observational studies, case reports, case series and RCTs including pregnant females were excluded from the analysis.
Results Initially, 415 publications, including 39 RCTs, were identified, from which 12 duplicate records were removed. Further, after the title and abstract screening, 15 records were excluded. After the full-text screening, 19 RCTs, including 17,021 individuals, were analyzed, of which 8,738 individuals received convalescent serum with the best medical treatment , whereas 8,283 individuals were provided with the best medical treatment alone or in combination with a placebo .
The sensitivity and leave-one-out analysis findings were comparable to those of the primary analysis, indicative of the robustness of the findings. No statistically significant small-study effects were observed in the included studies.
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