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Maternal death related to COVID‐19: A systematic review and meta‐analysis focused on maternal co‐morbidities and clinical characteristics
Open accessAbstract
Background: Besides reducing the quality of obstetric care, the direct impact of COVID‐19 on pregnancy and postpartum is uncertain. Objective: To evaluate the characteristics of pregnant women who died due to COVID‐19. Search strategy: Cochrane Library, Embase, MEDLINE, Scopus, and Google Scholar were searched from inception to February 2021. Selection criteria: Studies that compared deceased and survived pregnant women with COVID‐19. Data collection and analysis: Relevant data were extracted and tabulated. The primary outcome was maternal co‐morbidity. Main results: Thirteen studies with 154 deceased patients were included. Obesity doubled the risk of death (relative risk [RR] 2.48, 95% confidence interval [CI] 1.41–4.36, I2 = 0%). No differences were found for gestational diabetes (RR 5.71; 95% CI 0.77–42.44, I2 = 94%) or asthma (RR 2.05, 95% CI 0.81–5.15, I2 = 0%). Overall, at least one severe co‐morbidity showed a twofold increased risk of death (RR 2.26, 95% CI 1.77–2.89, I2 = 76%). Admission to intensive care was related to a fivefold increased risk of death (RR 5.09, 95% CI 2.00–12.98, I2 = 56%), with no difference in need for respiratory support (RR 0.53, 95% CI 0.23–1.48, I2 = 95%) or mechanical ventilation (RR 4.34, 95% CI 0.96–19.60, I2 = 58%). Conclusion: COVID‐19 with at least one co‐morbidity increases risk of intensive care and mortality.
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Maternal obesity was a factor in the deaths of women infected with COVID-19 during pregnancy, with more than double the risk of death in women with BMI greater than 30 kg/m2.
“Maternal obesity was also a factor in the deaths of women who were infected with COVID‐19 during pregnancy, with more than double the risk of death in women with BMI > 30 kg m–2. 50”
From Overweight, obesity and excessive weight gain in pregnancy as risk factors for adverse pregnancy outcomes: A narrative review (2022) · cites this paper as [50]
The Results (Meta-analysis; page unavailable) report that maternal obesity was associated with a 2.48-fold risk of death during COVID-19 infection, supporting the more-than-double-risk claim. Our copy does not specify BMI >30 kg/m² as the obesity cutoff, so it does not establish the claim for that precise group. (LLM, conf=0.85)
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Newcastle-Ottawa Scale: comparing reviewers’ to authors’ assessments
Lo, C. K.-L., Mertz, D., & Loeb, M. (2014) · BMC Medical Research Methodology · doi:10.1186/1471-2288-14-45 · Cited by 2,477
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Langley‐Evans, S. C., Pearce, J., & Ellis, S. (2022) · Journal of Human Nutrition and Dietetics · doi:10.1111/jhn.12999 · Cited by 288
Carrión-Nessi, F. S., Castro, M. P., Freitas-De Nobrega, D. C., Moncada-Ortega, A., Omaña-Ávila, Ó. D., Mendoza-Millán, D. L., Marcano-Rojas, M. V., Trejo, N. J., Virriel, I. V., Chavero, M., et al. (2022) · BMC Pregnancy and Childbirth · doi:10.1186/s12884-022-05253-2 · Cited by 5
Metadata
- Authors
- La Verde, M., Riemma, G., Torella, M., Cianci, S., Savoia, F., Licciardi, F., Scida, S., Morlando, M., Colacurci, N., & De Franciscis, P.
- Affiliations
- Department of Woman, Child and General and Specialized Surgery, Obstetrics and Gynecology Unit University of Campania “Luigi Vanvitelli” Naples Italy
- University of Campania "Luigi Vanvitelli" (IT)
- University of Messina (IT)
- Corresponding author
- Riemma, Gaetano
- ORCID
- Venue
- International Journal of Gynecology & Obstetrics
- Publisher
- Wiley
- Published
- 2021-05-18
- Volume
- 154
- Issue
- 2
- Pages
- 212-219
- ISSN
- 0020-6695 (ISSN-L)
- 0020-7292
- 1879-3479
- PMC
- PMC9087672
- OpenAlex
- W3158859529
- Cited by
- 69
- References
- 2
- Citations by year
- 2026: 2 · 2025: 7 · 2024: 12 · 2023: 16 · 2022: 24 · 2021: 8
- FWCI
- 2.77
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- International Journal of Gynecology & Obstetrics (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Archivio Istituzionale della Ricerca - Università degli Studi della Campania "Luigi Vanvitelli" (submittedVersion)
- Topics
- Health Sciences › Medicine › Obstetrics and Gynecology › COVID-19 Impact on Reproduction
- Health Sciences › Medicine › Infectious Diseases › COVID-19 Clinical Research Studies
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Issues in Pregnancy
- Keywords
- COVID-19 pandemic, maternal mortality, pregnancy, maternal comorbidities, obesity, gestational diabetes mellitus, asthma, intensive care unit admission, mechanical ventilation, respiratory support, mortality risk factors
- MeSH terms
- COVID-19, SARS-CoV-2, Asthma, Female, Humans, Infant, Newborn, Maternal Mortality, Obesity, Pregnancy, Pregnancy Complications, Infectious, Comorbidity, Diabetes, Gestational, Postpartum Period, Pandemics, Maternal Death
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