{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,30]],"date-time":"2026-05-30T08:02:32Z","timestamp":1780128152790,"version":"3.54.0"},"reference-count":27,"publisher":"Elsevier BV","license":[{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"},{"start":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T00:00:00Z","timestamp":1759968000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Cancer Epidemiology"],"published-print":{"date-parts":[[2025,12]]},"DOI":"10.1016\/j.canep.2025.102942","type":"journal-article","created":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T19:12:02Z","timestamp":1760555522000},"page":"102942","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":0,"special_numbering":"C","title":["Approaches to handle missing follow-up time: A comparative analysis of contralateral breast cancer incidence"],"prefix":"10.1016","volume":"99","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4704-6570","authenticated-orcid":false,"given":"Sarah R.","family":"Haile","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0888-0690","authenticated-orcid":false,"given":"Miriam","family":"Wanner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9217-8038","authenticated-orcid":false,"given":"Dimitri","family":"Korol","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sabine","family":"Rohrmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"78","reference":[{"key":"10.1016\/j.canep.2025.102942_bib1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.breast.2018.11.005","article-title":"Risk factors for metachronous contralateral breast cancer: a systematic review and meta-analysis","volume":"44","author":"Akdeniz","year":"2019","journal-title":"Breast"},{"key":"10.1016\/j.canep.2025.102942_bib2","doi-asserted-by":"crossref","first-page":"1224","DOI":"10.1038\/s41416-022-01701-0","article-title":"Five ways to improve international comparisons of cancer survival: lessons learned from ICBP SURVMARK-2","volume":"126","author":"Andersson","year":"2022","journal-title":"Br. J. Cancer"},{"key":"10.1016\/j.canep.2025.102942_bib3","doi-asserted-by":"crossref","first-page":"747","DOI":"10.1016\/j.ejca.2008.11.032","article-title":"Evaluation of data quality in the cancer registry: principles and methods. Part I: comparability, validity and timeliness","volume":"45","author":"Bray","year":"2009","journal-title":"Eur. J. Cancer"},{"key":"10.1016\/j.canep.2025.102942_bib4","doi-asserted-by":"crossref","first-page":"432","DOI":"10.1002\/ijc.24344","article-title":"Implications of incomplete registration of deaths on long-term survival estimates from population-based cancer registries","volume":"125","author":"Brenner","year":"2009","journal-title":"Int. J. Cancer"},{"key":"10.1016\/j.canep.2025.102942_bib5","unstructured":"Bundesamt f\u00fcr Statistik 2024. R\u00e4umliche Verteilung der st\u00e4ndigen Wohnbev\u00f6lkerungnach institutionellen Gliederungen."},{"key":"10.1016\/j.canep.2025.102942_bib6","series-title":"Multiple Imputation And Its Application","author":"Carpenter","year":"2023"},{"key":"10.1016\/j.canep.2025.102942_bib7","doi-asserted-by":"crossref","first-page":"771","DOI":"10.1016\/S0140-6736(11)60993-8","article-title":"Relevance of breast cancer hormone receptors and other factors to the efficacy of adjuvant tamoxifen: Patient-level meta-analysis of randomised trials","volume":"378","author":"Early Breast Cancer Trialists\u2019 Collaborative Group (EBCTCG)","year":"2011","journal-title":"Lancet"},{"key":"10.1016\/j.canep.2025.102942_bib8","doi-asserted-by":"crossref","DOI":"10.1186\/1471-2288-11-129","article-title":"Imputation of missing values of tumour stage in population-based cancer registration","volume":"11","author":"Eisemann","year":"2011","journal-title":"BMC Med. Res. Method."},{"key":"10.1016\/j.canep.2025.102942_bib9","unstructured":"European Network of Cancer Registries 2025. ENCR recommendations."},{"key":"10.1016\/j.canep.2025.102942_bib10","doi-asserted-by":"crossref","first-page":"347","DOI":"10.1093\/aje\/kwr512","article-title":"Use of imputed population-based cancer registry data as a method of accounting for missing information: application to estrogen receptor status for breast cancer","volume":"176","author":"Howlader","year":"2012","journal-title":"Am. J. Epidemiol."},{"key":"10.1016\/j.canep.2025.102942_bib11","unstructured":"Krebsregistrierungsgesetz (KRG) 2023. Cancer registration act (Bundesgesetz \u00fcber die Registrierung von Krebserkrankungen)."},{"key":"10.1016\/j.canep.2025.102942_bib12","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1371\/journal.pone.0180033","article-title":"Validity of using multiple imputation for \"unknown\" stage at diagnosis in population-based cancer registry data","volume":"12","author":"Luo","year":"2017","journal-title":"PLOS One"},{"key":"10.1016\/j.canep.2025.102942_bib13","unstructured":"National Agency for Cancer Registration 2024. Cancer survival in Switzerland 1982 - 2021."},{"key":"10.1016\/j.canep.2025.102942_bib14","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1016\/j.breast.2023.07.010","article-title":"Breast cancer survival and incidence of second primary cancers after 30 years in a randomized study of two versus five years of adjuvant tamoxifen therapy","volume":"71","author":"Nordenskj\u00f6ld","year":"2023","journal-title":"Breast"},{"key":"10.1016\/j.canep.2025.102942_bib15","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1093\/ije\/dyp309","article-title":"Modelling relative survival in the presence of incomplete data: a tutorial","volume":"39","author":"Nur","year":"2010","journal-title":"Int. J. Epidemiol."},{"key":"10.1016\/j.canep.2025.102942_bib16","doi-asserted-by":"crossref","first-page":"756","DOI":"10.1016\/j.ejca.2008.11.033","article-title":"Evaluation of data quality in the cancer registry: principles and methods part II. Completeness","volume":"45","author":"Parkin","year":"2009","journal-title":"Eur. J. Cancer"},{"key":"10.1016\/j.canep.2025.102942_bib17","doi-asserted-by":"crossref","first-page":"44","DOI":"10.1016\/j.canep.2018.11.003","article-title":"Imputation of missing prostate cancer stage in English cancer registry data based on clinical assumptions","volume":"58","author":"Parry","year":"2019","journal-title":"Cancer Epidemiol."},{"key":"10.1016\/j.canep.2025.102942_bib18","first-page":"177","article-title":"Implications of missing data on reported breast cancer mortality","volume":"197","author":"Pitcha","year":"2023","journal-title":"Epidemiology"},{"key":"10.1016\/j.canep.2025.102942_bib19","doi-asserted-by":"crossref","first-page":"365","DOI":"10.1007\/s00432-015-2031-1","article-title":"Incidence of metachronous contralateral breast cancer in the canton of zurich: a population-based study of the cancer registry","volume":"142","author":"Prater","year":"2016","journal-title":"J. Cancer Res Clin. Oncol."},{"key":"10.1016\/j.canep.2025.102942_bib20","unstructured":"R Core Team 2024. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria."},{"key":"10.1016\/j.canep.2025.102942_bib21","doi-asserted-by":"crossref","first-page":"400","DOI":"10.1097\/CEJ.0000000000000881","article-title":"Better tools for better estimates: improving approaches to handling missing data in Swiss cancer registries","volume":"33","author":"Richter","year":"2024","journal-title":"Eur. J. Cancer Prev."},{"key":"10.1016\/j.canep.2025.102942_bib22","series-title":"Multiple Imputation for Nonresponse in Surveys","author":"Rubin","year":"1987"},{"key":"10.1016\/j.canep.2025.102942_bib23","doi-asserted-by":"crossref","first-page":"b2393","DOI":"10.1136\/bmj.b2393","article-title":"Multiple imputation for missing data in epidemiological and clinical research: potential and pitfalls","volume":"338","author":"Sterne","year":"2011","journal-title":"BMJ"},{"key":"10.1016\/j.canep.2025.102942_bib24","doi-asserted-by":"crossref","first-page":"932","DOI":"10.1002\/ijc.34568","article-title":"Predicting second breast cancer among women with primary breast cancer using machine learning algorithms, a population-based observational study","volume":"153","author":"Syleouni","year":"2023","journal-title":"Int. J. Cancer"},{"key":"10.1016\/j.canep.2025.102942_bib25","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v045.i03","article-title":"Mice: multivariate imputation by chained equations in R","volume":"45","author":"Buuren","year":"2011","journal-title":"J. Stat. Softw."},{"key":"10.1016\/j.canep.2025.102942_bib26","doi-asserted-by":"crossref","DOI":"10.1155\/2018\/7656197","article-title":"Indicators of data quality at the cancer registry Zurich and Zug in Switzerland","author":"Wanner","year":"2018","journal-title":"BioMed. Res. Int."},{"key":"10.1016\/j.canep.2025.102942_bib27","doi-asserted-by":"crossref","first-page":"1982","DOI":"10.1002\/sim.3618","article-title":"Imputing missing covariate values for the cox model","volume":"28","author":"White","year":"2009","journal-title":"Stat. Med."}],"container-title":["Cancer Epidemiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1877782125002024?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S1877782125002024?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2026,5,30]],"date-time":"2026-05-30T07:37:05Z","timestamp":1780126625000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S1877782125002024"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,12]]},"references-count":27,"alternative-id":["S1877782125002024"],"URL":"https:\/\/doi.org\/10.1016\/j.canep.2025.102942","relation":{},"ISSN":["1877-7821"],"issn-type":[{"value":"1877-7821","type":"print"}],"subject":[],"published":{"date-parts":[[2025,12]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Approaches to handle missing follow-up time: A comparative analysis of contralateral breast cancer incidence","name":"articletitle","label":"Article Title"},{"value":"Cancer Epidemiology","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.canep.2025.102942","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2025 The Authors. Published by Elsevier Ltd.","name":"copyright","label":"Copyright"}],"article-number":"102942"}}