Abstract
In survival analyses using cancer registry data, second and subsequent primary cancers diagnosed in individuals are typically excluded. However, this approach may lead to biased comparisons of survival between cancer registries, or over time within a single registry. To examine the impact of including multiple primary cancers in the derivation of survival estimates using data from a population-based national cancer registry. Five-year relative survival estimates for persons aged 15-99 years at diagnosis were derived using all eligible primary cases from the Canadian Cancer Registry (CCR)-a population-based registry containing information on cases diagnosed from 1992 onward-and then again using first primary cases only. Any pre-1992 cancer history of persons on the CCR was obtained by using auxiliary information. The inclusion of multiple cancers resulted in lower estimates of 5-year relative survival for virtually all cancers studied. The effect was somewhat attenuated by age-standardization (e.g., from 1.3% to 1.0% for all cancers combined), and was greatest for bladder cancer (-2.4%) followed by oral cancer (-1.9%)-cancers that had the first and third lowest proportions of first cancers, respectively. For the majority of canc...Continue Reading
References
Jun 28, 2007·International Journal of Cancer. Journal International Du Cancer·Hermann Brenner, Timo Hakulinen
May 6, 2008·European Journal of Cancer : Official Journal for European Organization for Research and Treatment of Cancer (EORTC) [and] European Association for Cancer Research (EACR)·A GondosUNKNOWN EUNICE Survival Working Group
Jan 6, 2009·European Journal of Cancer : Official Journal for European Organization for Research and Treatment of Cancer (EORTC) [and] European Association for Cancer Research (EACR)·Stefano RossoUNKNOWN EUROCARE Working Group
Jan 9, 2009·European Journal of Cancer : Official Journal for European Organization for Research and Treatment of Cancer (EORTC) [and] European Association for Cancer Research (EACR)·Roberta De AngelisUNKNOWN EUROCARE Working Group
Feb 1, 2000·International Journal of Clinical Oncology·K Ohnishi
Citations
Apr 6, 2013·Cancer Causes & Control : CCC·Hannah K WeirTrevor D Thompson
Feb 15, 2012·Advances in Nutrition·Shannon L KelleherVeronica Lopez
Jun 20, 2014·International Journal of Cancer. Journal International Du Cancer·Libby EllisBernard Rachet
Oct 1, 2015·European Journal of Cancer : Official Journal for European Organization for Research and Treatment of Cancer (EORTC) [and] European Association for Cancer Research (EACR)·Silvia RossiUNKNOWN EUROCARE-5 Working Group:
Sep 12, 2015·Rehabilitation Research and Practice·Sherry L GraceSimon L Bacon
Dec 4, 2014·Lancet·Claudia AllemaniUNKNOWN CONCORD Working Group
Jul 30, 2016·Cancer Epidemiology·Baozhen QiaoAmy R Kahn
Nov 9, 2010·Cancer Causes & Control : CCC·Armin D WeinbergRochelle L Rollins
Jul 19, 2014·Cancer Causes & Control : CCC·Prithwish DeDagny Dryer
Jan 21, 2016·The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques·Garth M Bray, Deanna L Huggett
Sep 3, 2011·BJU International·Lanting LuKen Stein
Jun 28, 2014·BMJ Open·M Constantine SamaanLehana Thabane
Nov 3, 2017·Journal of Epidemiology·Ayako OkuyamaHiroshi Nishimoto
Aug 16, 2021·Japanese Journal of Clinical Oncology·Shihoko KoyamaIsao Miyashiro
Oct 9, 2021·Cancer·Gonçalo ForjazAngela B Mariotto