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Can different definitions of date of cancer incidence explain observed international variation in cancer survival? An ICBP SURVMARK-2 study

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journal contribution
posted on 2021-03-18, 12:40 authored by TÅ Myklebust, T Andersson, A Bardot, S Vernon, A Gavin, D Fitzpatrick, MB Jerm, M Rutherford, DM Parkin, P Sasieni, M Arnold, I Soerjomataram, F Bray, PC Lambert, B Møller
Background
Differences in registration practices across population-based cancer registries may contribute to international variation in survival estimates. In particular, there are variations in recorded date of incidence (DOI) as cancer registries have access to different sources of information and use different rules to determine an official DOI. This study investigates the impact of different DOI rules on cancer survival estimates.

Materials and methods
Detailed data on dates of pathological confirmation and hospital admittance were collected from three registries participating in the ICBP SURVMARK-2 project (England, Northern Ireland and Norway). Multiple dates of incidence were determined for each cancer patient diagnosed during 2010–2014 by applying three sets of rules that prioritize either: a) histological date, b) hospital admittance date or c) the earliest date recorded. For each set of rules and registry, 1- and 5-year net survival were estimated for eight cancer sites (oesophagus, stomach, colon, rectum, liver, pancreas, lung and ovary).

Results
The mean difference between different DOIs within a country and cancer site ranged from 0.1–23 days. The variation in 1- and 5-year net survival using different DOIs were generally small for all registries and cancer sites. Only for liver and pancreatic cancer in Norway and ovarian cancer in England, were larger 1-year survival differences, of 2–3 % found.

Conclusion
In the ongoing discussion of the comparability of survival estimates across registry populations, the use of different DOI definitions can be considered to have a very limited impact.

Funding

Canadian Partnership Against Cancer; Cancer Council Victoria; Cancer Institute New South Wales; Cancer Research UK; Danish Cancer Society; National Cancer Registry Ireland; The Cancer Society of New Zealand; National Health Service England; Norwegian Cancer Society; Public Health Agency Northern Ireland, on behalf of the Northern Ireland Cancer Registry; The Scottish Government; Western Australia Department of Health; and Wales Cancer Network.

History

Citation

Cancer Epidemiology, Volume 67, August 2020, 101759

Author affiliation

Department of Health Sciences, University of Leicester

Version

  • VoR (Version of Record)

Published in

Cancer Epidemiology

Volume

67

Pagination

101759

Publisher

Elsevier BV

issn

1877-7821

eissn

1877-783X

Acceptance date

2020-05-30

Copyright date

2020

Available date

2021-03-18

Spatial coverage

Netherlands

Language

eng

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