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Efficacy of omega-3 fatty acids for hospitalized COVID-19 patients: a systematic review and meta-analysis of randomized controlled trials.
Asia Pacific Journal of Clinical Nutrition 2023 September
BACKGROUND AND OBJECTIVES: Emerging expert consensuses and guidelines recommend that omega-3 fatty acids may have anti-inflammatory effects in hospitalized patients with coronavirus disease (COVID-19). However, these recommendations are based on pathophysiological studies of inflammation rather than direct clinical evidence. We conducted this systematic review and meta-analysis to evaluate the efficacy of omega-3 fatty acid supplementation in hospitalized patients with COVID-19.
METHODS AND STUDY DESIGN: We retrieved literature from PubMed, Web of Science, Embase, China National Knowledge Infrastructure (CNKI), WANFANG, Chinese Biomedical Literature Database, and Cochrane Library databases up to May 1, 2023. Data from studies comparing omega-3 fatty acids with a placebo or other pharmaceutical nutrients were analyzed.
RESULTS: Of 3032 records, 42 full-text articles were reviewed, five eligible studies were identified, and one study was found in the references. In total of six studies involving 273 patients were included, pooled, and analyzed. Compared to the control group, omega-3 fatty acid intervention reduced the overall mortality of hospitalized patients with COVID-19 (RR=0.76; 95% CI, [0.61, 0.93]; p=0.010). No serious or unexpected drug-related adverse events were observed. No statistical significance was observed in inflammatory markers such as CRP (MD=-9.69; 95% CI, [-22.52, 3.15]; p=0.14; I2=97%) and IL-6; however, the neutrophil/lymphocyte ratio was significantly lower in the omega-3 FAs group on day 7 of intervention (p < 0.001).
CONCLUSIONS: Omega-3 fatty acid administration may be associated with reduced mortality in hospitalized patients with COVID-19. Given the small sample size of enrolled studies, more rigorous and large-scale trials are urgently needed in the future to verify its efficacy.
METHODS AND STUDY DESIGN: We retrieved literature from PubMed, Web of Science, Embase, China National Knowledge Infrastructure (CNKI), WANFANG, Chinese Biomedical Literature Database, and Cochrane Library databases up to May 1, 2023. Data from studies comparing omega-3 fatty acids with a placebo or other pharmaceutical nutrients were analyzed.
RESULTS: Of 3032 records, 42 full-text articles were reviewed, five eligible studies were identified, and one study was found in the references. In total of six studies involving 273 patients were included, pooled, and analyzed. Compared to the control group, omega-3 fatty acid intervention reduced the overall mortality of hospitalized patients with COVID-19 (RR=0.76; 95% CI, [0.61, 0.93]; p=0.010). No serious or unexpected drug-related adverse events were observed. No statistical significance was observed in inflammatory markers such as CRP (MD=-9.69; 95% CI, [-22.52, 3.15]; p=0.14; I2=97%) and IL-6; however, the neutrophil/lymphocyte ratio was significantly lower in the omega-3 FAs group on day 7 of intervention (p < 0.001).
CONCLUSIONS: Omega-3 fatty acid administration may be associated with reduced mortality in hospitalized patients with COVID-19. Given the small sample size of enrolled studies, more rigorous and large-scale trials are urgently needed in the future to verify its efficacy.
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