ArticleBreast cancer research and treatment2023
COVID-19 related change in breast cancer diagnosis, stage, treatment, and case volume: 2019-2021.
Article in Breast cancer research and treatment, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 6 citations in OpenAlex.
- Impact of the COVID-19 pandemic on systemic anti-cancer therapy in patients with breast cancer: a systematic review and meta-analysis.Journal of pharmaceutical policy and practice · 2026Review
- Trends in the Management of Small HER2-Positive Breast Cancers.Annals of surgical oncology · 2025Article
- COVID-19 pandemic interruption of breast cancer screening is linked to clinical upstaging at presentation: the roles of demographics, socioeconomic status and unmet social needs.Breast cancer research and treatment · 2025Observational
- Impact of the Coronavirus disease pandemic on early breast cancer.Frontiers in oncology · 2024Article
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeEvaluate the COVID-19 pandemic impact on breast cancer detection method, stage and treatment before, during and after health care restrictions.
methodsIn a retrospective tertiary cancer care center cohort, first primary breast cancer (BC) patients, years 2019-2021, were reviewed (n = 1787). Chi-square statistical comparisons of detection method (patient (PtD)/mammography (MamD), Stage (0-IV) and treatment by pre-pandemic time 1: 2019 + Q1 2020; peak-pandemic time 2: Q2-Q4 2020; pandemic time 3: Q1-Q4 2021 (Q = quarter) periods and logistic regression for odds ratios were used.
resultsBC case volume decreased 22% in 2020 (N = 533) (p = .001). MamD declined from 64% pre-pandemic to 58% peak-pandemic, and increased to 71% in 2021 (p < .001). PtD increased from 30 to 36% peak-pandemic and declined to 25% in 2021 (p < .001). Diagnosis of Stage 0/I BC declined peak-pandemic when screening mammography was curtailed due to lock-down mandates but rebounded above pre-pandemic levels in 2021. In adjusted regression, peak-pandemic stage 0/I BC diagnosis decreased 24% (OR = 0.76, 95% CI: 0.60, 0.96, p = .021) and increased 34% in 2021 (OR = 1.34, 95% CI: 1.06, 1.70, p = .014). Peak-pandemic neoadjuvant therapy increased from 33 to 38% (p < .001), primarily for surgical delay cases.
conclusionsThe COVID-19 pandemic restricted health-care access, reduced mammography screening and created surgical delays. During the peak-pandemic time, due to restricted or no access to mammography screening, we observed a decrease in stage 0/I BC by number and proportion. Continued low case numbers represent a need to re-establish screening behavior and staffing.
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