Decrease in the number of new cancer diagnoses during the first year of the COVID-19 pandemic – cohort study of 3.5 million individuals in western Poland
IntroductionThe COVID-19 pandemic has considerably affected healthcare systems worldwide and is expected to influence cancer incidence, mortality, stage at diagnosis, and survival. This study aimed to assess COVID-19-related changes in cancer incidence observed in 2020 in the Greater Poland region.M...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-12-01
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| Series: | Frontiers in Oncology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fonc.2023.1230289/full |
| _version_ | 1797383228630237184 |
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| author | Maciej Trojanowski Piotr Radomyski Piotr Radomyski Witold Kycler Irmina Maria Michalek |
| author_facet | Maciej Trojanowski Piotr Radomyski Piotr Radomyski Witold Kycler Irmina Maria Michalek |
| author_sort | Maciej Trojanowski |
| collection | DOAJ |
| description | IntroductionThe COVID-19 pandemic has considerably affected healthcare systems worldwide and is expected to influence cancer incidence, mortality, stage at diagnosis, and survival. This study aimed to assess COVID-19-related changes in cancer incidence observed in 2020 in the Greater Poland region.Materials and methodsData from the Greater Poland Cancer Registry on cancer patients diagnosed between 2010 and 2020 were analysed. To quantify the change in the number of incident cancer cases during the COVID-19 pandemic, we calculated the standardized incidence ratio (SIR) and the incidence rate difference (IRD) to assume the pandemic-attributable gap in cancer incidence.ResultsIn 2020, in Greater Poland, the expected number of new cancer cases was 18 154 (9 226 among males and 8 927 among females), while the observed number was 14 770 (7 336 among males and 7 434 among females). The registered number of cancer cases decreased in 2020 by 20% (SIR 0·80, 95% CI 0·78 to 0·81) and 17% (SIR 0·83, 95% CI 0·81 to 0·85) in males and females, respectively. Among men, the most significant difference was reported for myeloma (SIR 0·59, 95% CI 0·45 to 0·77), among women for bone cancer (SIR 0·47, 95% CI 0·20 to 0·93). In females the observed incidence was higher than expected for cancer of an unspecified site (SIR 1·19, 95% CI 1·01 to 1·38). In our study, the decrease in new cancer cases was greater in males than in females.DiscussionThe observed incidence was affected in most cancer sites, with the most significant deviation from the expected number in the case of myeloma. An increase in the observed incidence was reported only in women diagnosed with cancer of an unspecified site, which might reflect shortages in access to oncological diagnostics. |
| first_indexed | 2024-03-08T21:17:53Z |
| format | Article |
| id | doaj.art-ecde7bafbe264211a162dfd710ed8391 |
| institution | Directory Open Access Journal |
| issn | 2234-943X |
| language | English |
| last_indexed | 2024-03-08T21:17:53Z |
| publishDate | 2023-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Oncology |
| spelling | doaj.art-ecde7bafbe264211a162dfd710ed83912023-12-21T15:07:45ZengFrontiers Media S.A.Frontiers in Oncology2234-943X2023-12-011310.3389/fonc.2023.12302891230289Decrease in the number of new cancer diagnoses during the first year of the COVID-19 pandemic – cohort study of 3.5 million individuals in western PolandMaciej Trojanowski0Piotr Radomyski1Piotr Radomyski2Witold Kycler3Irmina Maria Michalek4Greater Poland Cancer Registry, Greater Poland Cancer Centre, Poznan, PolandRadiology Department, Greater Poland Cancer Centre, Poznan, PolandElectroradiology Department, Poznan University of Medical Sciences, Poznan, PolandGastrointestinal Surgical Department, Greater Poland Cancer Centre, Poznan, PolandCancer Epidemiology and Primary Prevention Department, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, PolandIntroductionThe COVID-19 pandemic has considerably affected healthcare systems worldwide and is expected to influence cancer incidence, mortality, stage at diagnosis, and survival. This study aimed to assess COVID-19-related changes in cancer incidence observed in 2020 in the Greater Poland region.Materials and methodsData from the Greater Poland Cancer Registry on cancer patients diagnosed between 2010 and 2020 were analysed. To quantify the change in the number of incident cancer cases during the COVID-19 pandemic, we calculated the standardized incidence ratio (SIR) and the incidence rate difference (IRD) to assume the pandemic-attributable gap in cancer incidence.ResultsIn 2020, in Greater Poland, the expected number of new cancer cases was 18 154 (9 226 among males and 8 927 among females), while the observed number was 14 770 (7 336 among males and 7 434 among females). The registered number of cancer cases decreased in 2020 by 20% (SIR 0·80, 95% CI 0·78 to 0·81) and 17% (SIR 0·83, 95% CI 0·81 to 0·85) in males and females, respectively. Among men, the most significant difference was reported for myeloma (SIR 0·59, 95% CI 0·45 to 0·77), among women for bone cancer (SIR 0·47, 95% CI 0·20 to 0·93). In females the observed incidence was higher than expected for cancer of an unspecified site (SIR 1·19, 95% CI 1·01 to 1·38). In our study, the decrease in new cancer cases was greater in males than in females.DiscussionThe observed incidence was affected in most cancer sites, with the most significant deviation from the expected number in the case of myeloma. An increase in the observed incidence was reported only in women diagnosed with cancer of an unspecified site, which might reflect shortages in access to oncological diagnostics.https://www.frontiersin.org/articles/10.3389/fonc.2023.1230289/fullcancercancer diagnosesCOVID-19incidencepopulation-based cancer registrySMAPE |
| spellingShingle | Maciej Trojanowski Piotr Radomyski Piotr Radomyski Witold Kycler Irmina Maria Michalek Decrease in the number of new cancer diagnoses during the first year of the COVID-19 pandemic – cohort study of 3.5 million individuals in western Poland Frontiers in Oncology cancer cancer diagnoses COVID-19 incidence population-based cancer registry SMAPE |
| title | Decrease in the number of new cancer diagnoses during the first year of the COVID-19 pandemic – cohort study of 3.5 million individuals in western Poland |
| title_full | Decrease in the number of new cancer diagnoses during the first year of the COVID-19 pandemic – cohort study of 3.5 million individuals in western Poland |
| title_fullStr | Decrease in the number of new cancer diagnoses during the first year of the COVID-19 pandemic – cohort study of 3.5 million individuals in western Poland |
| title_full_unstemmed | Decrease in the number of new cancer diagnoses during the first year of the COVID-19 pandemic – cohort study of 3.5 million individuals in western Poland |
| title_short | Decrease in the number of new cancer diagnoses during the first year of the COVID-19 pandemic – cohort study of 3.5 million individuals in western Poland |
| title_sort | decrease in the number of new cancer diagnoses during the first year of the covid 19 pandemic cohort study of 3 5 million individuals in western poland |
| topic | cancer cancer diagnoses COVID-19 incidence population-based cancer registry SMAPE |
| url | https://www.frontiersin.org/articles/10.3389/fonc.2023.1230289/full |
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