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Long-term survival and conditional survival of cancer patients in Japan using population-based cancer registry data

Although we usually report 5-year cancer survival using population-based cancer registry data, nowadays many cancer patients survive longer and need to be followed-up for more than 5 years. Long-term cancer survival figures are scarce in Japan. Here we report 10-year cancer survival and conditional...

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Detalles Bibliográficos
Autores principales: Ito, Yuri, Miyashiro, Isao, Ito, Hidemi, Hosono, Satoyo, Chihara, Dai, Nakata-Yamada, Kayo, Nakayama, Masashi, Matsuzaka, Masashi, Hattori, Masakazu, Sugiyama, Hiromi, Oze, Isao, Tanaka, Rina, Nomura, Etsuko, Nishino, Yoshikazu, Matsuda, Tomohiro, Ioka, Akiko, Tsukuma, Hideaki, Nakayama, Tomio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Blackwell Publishing Ltd 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4462379/
https://www.ncbi.nlm.nih.gov/pubmed/25183551
http://dx.doi.org/10.1111/cas.12525
Descripción
Sumario:Although we usually report 5-year cancer survival using population-based cancer registry data, nowadays many cancer patients survive longer and need to be followed-up for more than 5 years. Long-term cancer survival figures are scarce in Japan. Here we report 10-year cancer survival and conditional survival using an established statistical approach. We received data on 1 387 489 cancer cases from six prefectural population-based cancer registries in Japan, diagnosed between 1993 and 2009 and followed-up for at least 5 years. We estimated the 10-year relative survival of patients who were followed-up between 2002 and 2006 using period analysis. Using this 10-year survival, we also calculated the conditional 5-year survival for cancer survivors who lived for some years after diagnosis. We reported 10-year survival and conditional survival of 23 types of cancer for 15–99-year-old patients and four types of cancer for children (0–14 years old) and adolescent and young adults (15–29 years old) patients by sex. Variation in 10-year cancer survival by site was wide, from 5% for pancreatic cancer to 95% for female thyroid cancer. Approximately 70–80% of children and adolescent and young adult cancer patients survived for more than 10 years. Conditional 5-year survival for most cancer sites increased according to years, whereas those for liver cancer and multiple myeloma did not increase. We reported 10-year cancer survival and conditional survival using population-based cancer registries in Japan. It is important for patients and clinicians to report these relevant figures using population-based data.