SynthesisInfection2020
The epidemiological burden and overall distribution of chronic comorbidities in coronavirus disease-2019 among 202,005 infected patients: evidence from a systematic review and meta-analysis.
Synthesis in Infection, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 9 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
27 citing papers in PubMed, 9 syntheses or guidelines pooled it, 52 citations in OpenAlex.
- Romosozumab's Effect on Bone Mineral Density in Patients with Osteoporosis: A Systematic Review and Meta-Analysis.Current medicinal chemistry · 2026Pooled it
- Cytokines and inflammatory biomarkers and their association with post-operative delirium: a meta-analysis and systematic review.Scientific reports · 2025Pooled it
- Systemic therapy and radiotherapy related complications and subsequent hospitalisation rates: a systematic review.BMC cancer · 2024Pooled it
- Accumulating the key proteomic signatures associated with delirium: Evidence from systematic review.PloS one · 2024Pooled it
- Prevalence of hypertension and associated risks in hospitalized patients with COVID-19: a meta-analysis of meta-analyses with 1468 studies and 1,281,510 patients.Systematic reviews · 2022Pooled it
- The association between environmental cadmium exposure, blood pressure, and hypertension: a systematic review and meta-analysis.Environmental science and pollution research international · 2022Pooled it
- The role of vitamin B12 in viral infections: a comprehensive review of its relationship with the muscle-gut-brain axis and implications for SARS-CoV-2 infection.Nutrition reviews · 2022Pooled it
- Covid-19 and non-communicable diseases: evidence from a systematic literature review.BMC public health · 2021Pooled it
- ACC Health Policy Statement on Cardiovascular Disease Considerations for COVID-19 Vaccine Prioritization: A Report of the American College of Cardiology Solution Set Oversight Committee.Journal of the American College of Cardiology · 2021Guideline
- Article
- The effectiveness of oral motor interventions on the weight gain, independent oral feeding, and length of hospital stay in hospitalized preterm infants: A systematic review and meta-analysis.Health science reports · 2024Article
- Impact of Long COVID-19 on Health Outcomes Among Adults With Preexisting Cardiovascular Disease and Hypertension: A Systematic Review.CJC open · 2024Review
- COVID-19 effect on patients with noncommunicable diseases: A narrative review.Health science reports · 2023Article
- COVID-19 Case Management Outcomes Amongst Diabetes and Hypertensive Patients in the United Arab Emirates: A Prospective Study.International journal of environmental research and public health · 2022Article
- An Evaluation of Non-Communicable Diseases and Risk Factors Associated with COVID-19 Disease Severity in Dubai, United Arab Emirates: An Observational Retrospective Study.International journal of environmental research and public health · 2022Observational
- Duodenal tropism of SARS-CoV-2 and clinical findings in critically ill COVID-19 patients.Infection · 2022Article
- Effectiveness of COVID-19 Vaccines against Delta Variant (B.1.617.2): A Meta-Analysis.Vaccines · 2022Review
- Clinical features and predictors of mortality among hospitalized patients with COVID-19 in Niger.Conflict and health · 2021Article
- COVID-19 in patients with cardiac disease: Impact and variables associated with mortality in a cardiology center in Brazil.American heart journal plus : cardiology research and practice · 2021Article
- Perspectives on the use and risk of adverse events associated with cytokine-storm targeting antibodies and challenges associated with development of novel monoclonal antibodies for the treatment of COVID-19 clinical cases.Human vaccines & immunotherapeutics · 2021Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThe main purpose of this study was to examine the overall distribution of chronic comorbidities in coronavirus disease-19 (COVID-19) infected populations and the risk of the underlying burden of disease in terms of the case fatality ratio (CFR).
methodsWe carried out a systematic review and meta-analysis of studies on COVID-19 patients published before 10
resultsA median age of COVID-19 patients was 56.4 years and 55% of the patients were male. The most prevalent chronic comorbid conditions were: any type of chronic comorbidity (37%; 95% CI 32-41%), hypertension (22%; 95% CI 17-27%), diabetes (14%; 95% CI 12-17%), respiratory diseases (5%; 95% CI 3-6%), cardiovascular diseases (13%; 95% CI 10-16%) and other chronic diseases (e.g., cancer) (8%; 95% CI 6-10%). Furthermore, 37% of COVID-19 patients had at least one chronic comorbid condition, 28% of patients had two conditions, and 19% of patients had three or more chronic conditions. The overall pooled CFR was 7% (95% CI 6-7%). The crude CFRs increased significantly with increasing number of chronic comorbid conditions, ranging from 6% for at least one chronic comorbid condition to 13% for 2 or 3 chronic comorbid conditions, 12% for 4 chronic comorbid conditions, 14% for 5 chronic comorbid conditions, and 21% for 6 or more chronic comorbid conditions. Furthermore, the overall CFRs also significantly increased with higher levels of reported clinical symptoms, ranging from 14% for at least four symptoms, to 15% for 5 or 6 symptoms, and 21% for 7 or more symptoms.
conclusionsThe chronic comorbid conditions were identified as dominating risk factors, which should be considered in an emergency disease management and treatment choices. There is urgent need to further enhance systematic and real-time sharing of epidemiologic data, clinical results, and experience to inform the global response to COVID-19.
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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.