Evidence map›Paper›PMID 39935358›Full record

ArticleActa oncologica (Stockholm, Sweden)2025

Changes in cancer incidence and stage during the COVID-19 pandemic in 2020-2021 in the Nordic countries.

Anna Johansson, Anna Skog, Tom Børge Johannesen, Tor Åge Myklebust, Simon M Kønig, Charlotte Wessel Skovlund, Lina Steinrud Mørch, Søren Friis, Marnar Fríðheim Kristiansen, David Pettersson and 9 more

Abstract read
In one paragraph

Article in Acta oncologica (Stockholm, Sweden), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from 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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

19 authors.

Anna JohanssonCancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden. Anna.Johansson@ki.se.ORCID 0000-0002-1191-7231
Anna SkogCancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway.
Tom Børge JohannesenCancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway.
Tor Åge MyklebustCancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway; Department of Research and Innovation, Møre and Romsdal Hospital Trust, Ålesund, Norway.
Simon M KønigDanish Cancer Institute, Danish Cancer Society, Copenhagen, Denmark.
Charlotte Wessel SkovlundDanish Cancer Institute, Danish Cancer Society, Copenhagen, Denmark.
Lina Steinrud MørchDanish Cancer Institute, Danish Cancer Society, Copenhagen, Denmark.
Søren FriisDanish Cancer Institute, Danish Cancer Society, Copenhagen, Denmark.
Marnar Fríðheim KristiansenCenter of Health Science, Faculty of Health Sciences, Tórshavn, Faroe Islands; National Hospital of the Faroe Islands, Tórshavn, Faroe Islands.
David PetterssonNational Board of Health and Welfare, Stockholm, Sweden.
Eva María GudmundsdóttirICS Research and Registration Center, Icelandic Cancer Society, Reykjavík, Iceland.
Nanna Margrét KristinsdóttirICS Research and Registration Center, Icelandic Cancer Society, Reykjavík, Iceland.
Helgi BirgissonICS Research and Registration Center, Icelandic Cancer Society, Reykjavík, Iceland.
Sandra IrenaeusRegional Cancer Center Central Sweden, Akademiska sjukhuset, Uppsala, Sweden; Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.
Johan AhlgrenRegional Cancer Center Central Sweden, Akademiska sjukhuset, Uppsala, Sweden.
Mats LambeDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden; Regional Cancer Center Central Sweden, Akademiska sjukhuset, Uppsala, Sweden.
Elli HirvonenFinnish Cancer Registry, Helsinki, Finland.
Janne PitkäniemiFinnish Cancer Registry, Helsinki, Finland.
Giske UrsinCancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway; Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway; Department of Preventive Medicine, University of Southern California, Los Angeles, CA, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeThe COVID-19 pandemic impacted substantially on cancer healthcare, including the temporary suspension of screening activities. We compared cancer incidence rates and stage during 2020-2021 to pre-pandemic rates in the Nordic countries. MATERIAL AND

methodsUsing data from the national cancer registries in Denmark, Finland, Iceland, Norway, and Sweden, we estimated age-, sex-, and period-adjusted incidence rate ratios, expressed as relative percentage change (%) with 95% confidence intervals (CIs), comparing rates in 2020-2021 to those in 2017-2019 (pre-pandemic).

resultsIn 2020-2021, 340,675 cancer cases were diagnosed. The incidence rates declined during the first pandemic wave (Q2 2020), ranging from -21.7% [95% CI: -23.3%; -20.2%] (Sweden) to -7.9% [-17.7%; 3.0%] (Iceland). Incidence rates also declined in the second pandemic wave (Q1 2021), ranging from -8.6% [-10.2%; -6.9%] (Sweden) to -2.3% [-4.6%; 0.1%] (Norway), and in Sweden also by -3.1% [-4.8%; -1.3%] in the third pandemic wave (Q4 2021). Stage I breast cancer incidence declined during 2020 in Denmark/Norway/Sweden, with some catch-up in stage II incidence in 2021. Prostate cancer rates declined in Denmark/Finland/Norway/Sweden during 2020-2021, while melanoma rates declined in Finland in 2020. During 2020, colon cancer rates declined in Denmark and Iceland, while rectal cancer rates declined in Denmark, and lung and kidney cancer rates declined in Norway.

interpretationDuring 2020-2021, cancer incidence rates declined across the Nordic countries with the largest declines in Sweden. During the third pandemic wave, the incidence rates were mostly similar to pre-pandemic rates. Changes in cancer stage may reflect reduced screening activities.

Indexed as

COVID-19NeoplasmsAdultAgedAged, 80 and overFemaleHumansIcelandIncidenceMaleMiddle AgedNeoplasm StagingPandemicsRegistriesSARS-CoV-2Scandinavian and Nordic Countries

Identifiers

PMID39935358
PMCPMC11833327

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Registered trials

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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.