SynthesisInternational journal of cancer2021
Cancer associates with risk and severe events of COVID-19: A systematic review and meta-analysis.
Synthesis in International journal of cancer, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 89 papers, 14 of them syntheses 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
89 citing papers in PubMed, 14 syntheses or guidelines pooled it.
- The impact of cancer on the severity of disease in patients affected with COVID-19: an umbrella review and meta-meta-analysis of systematic reviews and meta-analyses involving 1,064,476 participants.Clinical and experimental medicine · 2023Pooled it
- Predictors of poor serologic response to COVID-19 vaccine in patients with cancer: a systematic review and meta-analysis.European journal of cancer (Oxford, England : 1990) · 2022Pooled it
- Methodological Considerations on COVID-19 Mortality in Cancer Patients: A Systematic Review and Meta-Analysis.JNCI cancer spectrum · 2022Pooled it
- Are patients with cancer at higher risk of COVID-19-related death? A systematic review and critical appraisal of the early evidence.Journal of cancer policy · 2022Pooled it
- Immunological and clinical efficacy of COVID-19 vaccines in immunocompromised populations: a systematic review.Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases · 2022Pooled it
- Distinct Symptoms and Underlying Comorbidities with Latitude and Longitude in COVID-19: A Systematic Review and Meta-Analysis.Canadian respiratory journal · 2022Pooled it
- Is Cancer an Independent Risk Factor for Fatal Outcomes of Coronavirus Disease 2019 Patients?Archives of medical research · 2021Pooled it
- Pre-existing health conditions and severe COVID-19 outcomes: an umbrella review approach and meta-analysis of global evidence.BMC medicine · 2021Pooled it
- A systematic review and meta-analysis of regional risk factors for critical outcomes of COVID-19 during early phase of the pandemic.Scientific reports · 2021Pooled it
- A systematic review of health sector responses to the coincidence of disasters and COVID-19.BMC public health · 2021Pooled it
- Effect of antitumor therapy on cancer patients infected by SARS-CoV-2: A systematic review and meta-analysis.Cancer medicine · 2021Pooled it
- Cancer associates with risk and severe events of COVID-19: A systematic review and meta-analysis.International journal of cancer · 2021Pooled it
- Antibody Responses to COVID-19 Vaccination in Cancer: A Systematic Review.Frontiers in oncology · 2021Pooled it
- Pooled it
- Anti-SARS-CoV-2 glyco-humanized polyclonal antibody XAV-19: phase II/III randomized placebo-controlled trial shows acceleration to recovery for mild to moderate patients with COVID-19.Frontiers in immunology · 2024Trial
- Safety and preliminary efficacy of the Gam-COVID-Vac vaccine and outcomes of SARS-CoV-2 infection in Russian patients with genitourinary malignancies.Journal of hematology & oncology · 2021Trial
- Differences in COVID-19-related hospitalization burden between kidney transplant recipients and hemodialysis patients vaccinated against COVID-19.Human vaccines & immunotherapeutics · 2026Observational
- Mobile apps for cancer patient education: a technology foresight analysis.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2026Article
- COVID-19 infection and cancer regression: a review of current evidence, potential mechanisms, and clinical perspectives on a Paradoxical phenomenon.Infectious agents and cancer · 2025Review
- Serological Response After the Fourth Dose of COVID-19 Vaccine in Highly Immunosuppressed Patients.Vaccines · 2025Article
29 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
Abstract
Evidence is mounting to indicate that cancer patients may have more likelihood of having coronavirus disease 2019 (COVID-19) but lack consistency. A robust estimate is urgently needed to convey appropriate information to the society and the public, in the time of ongoing COVID-19 pandemic. We performed a systematic review and meta-analysis through a comprehensive literature search in major databases in English and Chinese, and two investigators conducted publication selection and data extraction independently. A meta-analysis was used to obtain estimates of pooled prevalence of cancer in patients with COVID-19 and determine the association of cancer with severe events, after assessment of potential heterogeneity, publication bias, and correction for the estimates when necessary. Total 38 studies comprising 7094 patients with COVID-9 were included; the pooled prevalence of cancer was estimated at 2.3% (95% confidence limit [CL] [0.018, 0.029]; P < .001) overall and 3.2% (95% CL [0.023, 0.041]; P < .001) in Hubei province; the corresponding estimates were 1.4% and 1.9% after correction for publication bias; cancer was significantly associated with the events of severe cases (odds ratio [OR] = 2.20, 95% CL [1.53, 3.17]; P < .001) and death (OR = 2.97, 95% CL [1.48, 5.96]; P = .002) in patients with COVID-19, there was no significant heterogeneity and a minimal publication bias. We conclude that cancer comorbidity is associated with the risk and severe events of COVID-19; special measures should be taken for individuals with cancer.
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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.