ArticleCMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne2023
Impact of the COVID-19 pandemic on cancer diagnoses, stage and survival in Alberta.
Article in CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.
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Who cites it
25 citing papers in PubMed, 1 synthesis or guideline pooled it.
- The multifaceted impact of the COVID-19 pandemic on colorectal cancer care: a systematic review of management disruptions, stage migration, and survival outcomes.Frontiers in oncology · 2026Pooled it
- Addressing the distressing: Pancreatic enzyme replacement therapy mitigates abdominal symptoms and weight loss during chemotherapy for advanced pancreatic cancer: A prospective study.Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition · 2026Article
- Changes in 1-year relative survival of patients with cancer during the COVID-19 pandemic in Denmark, Finland, Iceland, Norway, and Sweden: A population-based cohort study.International journal of cancer · 2026Article
- Impact of the COVID-19 pandemic and its measures on one-year and three-year cancer survival using Swiss cantonal cancer registry data.Cancer causes & control : CCC · 2026Article
- Colorectal cancer incidence before and during the COVID-19 pandemic: a non-linear interrupted time-series analysis.Scientific reports · 2026Article
- Article
- Evaluation of prostate cancer diagnosis during the COVID-19 crisis in the French Caribbean.Scientific reports · 2026Article
- Populational analysis of the mortality-to-incidence ratio across 20 cancer groupings in the Russian Federation.Journal of global health · 2026Article
- Changes in oncological surgical volume and postoperative survival during the COVID-19 pandemic: a retrospective multicenter study in a regional German hospital network.Frontiers in oncology · 2026Article
- Antimicrobial use trends in Canadian adult hematology/oncology inpatient wards: a multi-year exploratory analysis from 2018 to 2023.Antimicrobial stewardship & healthcare epidemiology : ASHE · 2026Article
- Impact of the COVID-19 Pandemic on Diagnosis and Multidisciplinary Treatment of NSCLC in Ontario, Canada.JTO clinical and research reports · 2025Article
- Prognosis of Patients with Breast Cancer Following Delayed Diagnosis During the COVID-19 Pandemic: A Real-World Cohort Study.Annals of surgical oncology · 2025Article
- Effect of the COVID-19 pandemic and lockdown on cancer stage distribution and time to treatment initiation using cancer registry data of the Swiss cantons of Zurich and Zug from 2018 to 2021.Journal of cancer research and clinical oncology · 2025Article
- Changes in female cancer diagnostic billing rates over the COVID-19 period in the Ontario Health Insurance Plan.Therapeutic advances in medical oncology · 2025Article
- Decreased overall survival in patients with hepatocellular carcinoma during the COVID-19 pandemic.Translational gastroenterology and hepatology · 2025Article
- Association between time to colonoscopy after positive fecal testing and colorectal cancer outcomes in Alberta, Canada.Journal of medical screening · 2024Article
- The impact of the COVID-19 pandemic on symptomatic breast cancer presentations in an Irish breast cancer unit: a retrospective cohort study.Irish journal of medical science · 2024Article
- The Impact of the Pandemic on the Quality of Colorectal and Anal Cancer Care, and 2-Year Clinical Outcomes.Current oncology (Toronto, Ont.) · 2024Article
- Impact of the COVID-19 pandemic on lymphoma incidence and short-term survival - a Swedish Lymphoma Register Study.Acta oncologica (Stockholm, Sweden) · 2024Article
- Measuring the impact of COVID-19 on cancer survival using an interrupted time series analysis.JNCI cancer spectrum · 2024Article
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10 authors.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundThe COVID-19 pandemic is suspected to have affected cancer care and outcomes among patients in Canada. In this study, we evaluated the impact of the state of emergency period during the COVID-19 pandemic (Mar. 17 to June 15, 2020) on cancer diagnoses, stage at diagnosis and 1-year survival in Alberta.
methodsWe included new diagnoses of the 10 most prevalent cancer types from Jan. 1, 2018, to Dec. 31, 2020. We followed patients up to Dec. 31, 2021. We used interrupted time series analysis to examine the impact of the first COVID-19-related state of emergency in Alberta on the number of cancer diagnoses. We used multivariable Cox regression to compare 1-year survival of the patients who received a diagnosis during 2020 after the state of emergency with those who received a diagnosis during 2018 and 2019. We also performed stage-specific analyses.
resultsWe observed significant reductions in diagnoses of breast cancer (incidence rate ratio [IRR] 0.67, 95% confidence interval [CI] 0.59-0.76), prostate cancer (IRR 0.64, 95% CI 0.56-0.73) and colorectal cancer (IRR 0.64, 95% CI 0.56- 0.74) and melanoma (IRR 0.57, 95% CI 0.47-0.69) during the state of emergency period compared with the period before it. These decreases largely occurred among early-stage rather than late-stage diagnoses. Patients who received a diagnosis of colorectal cancer, non-Hodgkin lymphoma and uterine cancer in 2020 had lower 1-year survival than those diagnosed in 2018; no other cancer sites had lower survival.
interpretationThe results from our analyses suggest that health care disruptions during the COVID-19 pandemic in Alberta considerably affected cancer outcomes. Given that the largest impact was observed among early-stage cancers and those with organized screening programs, additional system capacity may be needed to mitigate future impact.
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