ReviewJournal of clinical medicine2022
The Role of ABO Blood Type in Patients with SARS-CoV-2 Infection: A Systematic Review.
Review in Journal of clinical medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
11 citing papers in PubMed, 1 synthesis or guideline pooled it.
- ABO and Rhesus blood groups and multiple health outcomes: an umbrella review of systematic reviews with meta-analyses of observational studies.BMC medicine · 2024Pooled it
- ABO blood types and SARS-CoV-2 infection assessed using seroprevalence data in a large population-based sample: the SAPRIS-SERO multi-cohort study.Scientific reports · 2023Trial
- Individuals with ABO Groups Show Significant Differences in Levels of Circulating Biomarkers Related to Inflammation, Apoptosis, Endothelial Dysfunction, Tissue Remodeling and Neurodegeneration: A Pilot Study.Diseases (Basel, Switzerland) · 2026Article
- Clinical characteristics and cause analysis of false-positive results in treponemal testing among patients.Annals of medicine · 2025Article
- The Investigation of the Distribution of ABO/Rh Blood Group in Hospitalized COVID-19 Patients and Its Association With Disease Severity, Clinical Outcomes, Lab Tests, and Radiologic Findings.Health science reports · 2025Article
- Serological markers of transfusion transmissible infections and ABO blood groups in Najran, Saudi Arabia.Saudi medical journal · 2024Article
- Blood Group Variations in COVID-19 Convalescent Plasma and Regular Blood Donors: A Comparative Analysis in the Serbian Population.Microorganisms · 2024Article
- Association between ABO blood groups and SARS-CoV-2 infection in blood donors of Puglia region.Annals of hematology · 2023Observational
- Factors Associated with Pneumonia in Patients Hospitalized with COVID-19 and the Role of Vaccination.Vaccines · 2023Article
- Observational studies must be reformed before the next pandemic.Nature medicine · 2023Article
- Risk management and communication plans from SARS to COVID-19 and beyond.The International journal of health planning and management · 2022Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The SARS-CoV-2 infection has caused over 422 million contagions and 5.8 million deaths resulting in a global health crisis. Several studies have investigated the risk factors predisposing to the infection and reported that the host susceptibility can be linked to the ABO blood group, but the current evidence is controversial. We systematically searched for articles in EMBASE, PubMed, and Cochrane library published up to 7 May 2021 to explore the association of the ABO blood group with the susceptibility to SARS-CoV-2 infection. All studies in people undergoing SARS-CoV-2 test controls were included. Odds ratios were obtained in each study and then synthesised by using meta-analysis. Overall, 22 articles were selected and more than 1,200,000 individuals of whom 74,563 resulted positive to SARS-CoV-2 and 1,166,717 resulted negative, were included in the meta-analysis. Overall, 487,985 subjects had blood group A, 151,879 had group B, 52,621 had group AB, and 548,795 had group O. Group O was slightly less associated with infection, as compared to the other three blood groups (OR = 0.91, 95% CI = 0.85-0.99,
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.