{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,4]],"date-time":"2026-02-04T17:02:01Z","timestamp":1770224521974,"version":"3.49.0"},"reference-count":19,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2021,5,20]],"date-time":"2021-05-20T00:00:00Z","timestamp":1621468800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100008730","name":"Kreftforeningen","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100008730","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100008363","name":"Kr\u00e6ftens Bek\u00e6mpelse","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100008363","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000289","name":"Cancer Research UK","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000289","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001171","name":"Cancer Institute NSW","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001171","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000951","name":"Cancer Council Victoria","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000951","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Intl Journal of Cancer"],"published-print":{"date-parts":[[2021,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Survival from lung cancer remains low, yet is the most common cancer diagnosed worldwide. With survival contrasting between the main histological groupings, small\u2010cell lung cancer (SCLC) and non\u2010small cell lung cancer (NSCLC), it is important to assess the extent that geographical differences could be from varying proportions of cancers with unspecified histology across countries. Lung cancer cases diagnosed 2010\u20102014, followed until 31 December 2015 were provided by cancer registries from seven countries for the ICBP SURVMARK\u20102 project. Multiple imputation was used to reassign cases with unspecified histology into SCLC, NSCLC and other. One\u2010year and three\u2010year age\u2010standardised net survival were estimated by histology, sex, age group and country. In all, 404\u2009617 lung cancer cases were included, of which 47\u2009533 (11.7%) and 262\u2009040 (64.8%) were SCLC and NSCLC. The proportion of unspecified cases varied, from 11.2% (Denmark) to 29.0% (The United Kingdom). After imputation with unspecified histology, survival variations remained: 1\u2010year SCLC survival ranged from 28.0% (New Zealand) to 35.6% (Australia) NSCLC survival from 39.4% (The United Kingdom) to 49.5% (Australia). The largest survival change after imputation was for 1\u2010year NSCLC (4.9 percentage point decrease). Similar variations were observed for 3\u2010year survival. The oldest age group had lowest survival and largest decline after imputation. International variations in SCLC and NSCLC survival are only partially attributable to differences in the distribution of unspecified histology. While it is important that registries and clinicians aim to improve completeness in classifying cancers, it is likely that other factors play a larger role, including underlying risk factors, stage, comorbidity and care management which warrants investigation.<\/jats:p>","DOI":"10.1002\/ijc.33620","type":"journal-article","created":{"date-parts":[[2021,5,1]],"date-time":"2021-05-01T19:15:37Z","timestamp":1619896537000},"page":"1013-1020","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["The impact of reclassifying cancers of unspecified histology on international differences in survival for small cell and non\u2010small cell lung cancer (<scp>ICBP SurvMark<\/scp>\u20102 project)"],"prefix":"10.1002","volume":"149","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4242-6240","authenticated-orcid":false,"given":"Eileen","family":"Morgan","sequence":"first","affiliation":[{"name":"Cancer Surveillance Branch International Agency for Research on Cancer  Lyon France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1700-6831","authenticated-orcid":false,"given":"Melina","family":"Arnold","sequence":"additional","affiliation":[{"name":"Cancer Surveillance Branch International Agency for Research on Cancer  Lyon France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mark J.","family":"Rutherford","sequence":"additional","affiliation":[{"name":"Department of Health Sciences University of Leicester  Leicester UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aude","family":"Bardot","sequence":"additional","affiliation":[{"name":"Cancer Surveillance Branch International Agency for Research on Cancer  Lyon France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4927-6932","authenticated-orcid":false,"given":"Jacques","family":"Ferlay","sequence":"additional","affiliation":[{"name":"Cancer Surveillance Branch International Agency for Research on Cancer  Lyon France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Prithwish","family":"De","sequence":"additional","affiliation":[{"name":"Analytics and Informatics Cancer Care Ontario  Toronto Ontario Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gerda","family":"Engholm","sequence":"additional","affiliation":[{"name":"Danish Cancer Society  Copenhagen Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher","family":"Jackson","sequence":"additional","affiliation":[{"name":"Cancer Society of New Zealand  Wellington New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alana","family":"Little","sequence":"additional","affiliation":[{"name":"Cancer Institute NSW  Alexandria New South Wales Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nathalie","family":"Saint\u2010Jacques","sequence":"additional","affiliation":[{"name":"Nova Scotia Health Authority Cancer Care Program, Registry &amp; Analytics  Halifax Nova Scotia Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paul","family":"Walsh","sequence":"additional","affiliation":[{"name":"National Cancer Registry Ireland, Cork Airport Business Park  Cork Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ryan R.","family":"Woods","sequence":"additional","affiliation":[{"name":"BC Cancer  Vancouver British Columbia Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dianne L.","family":"O'Connell","sequence":"additional","affiliation":[{"name":"Cancer Research Division Cancer Council NSW  Sydney New South Wales Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3248-7787","authenticated-orcid":false,"given":"Freddie","family":"Bray","sequence":"additional","affiliation":[{"name":"Cancer Surveillance Branch International Agency for Research on Cancer  Lyon France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D. 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