title: Partial cancer prevalence in Japan up to 2020: estimates based on incidence and survival data from population-based cancer registries.
abstract: Measuring cancer prevalence in Japan has been difficult because population-based cancer registries have been conducted in limited areas. The purpose of this study was to estimate cancer prevalence in Japan from 1995 to 2020 for 5-year periods based on selected population-based cancer registry data. 1-, 2-3-, 4-5- and 5-year partial prevalence were estimated using incidence and survival data. Incidence and survival were calculated using data from selected cancer registries. We estimated the cancer survival by age group, primary site, and sex using the mixture cure fraction model. Kaplan-Meier estimates were applied to subgroups for which the survival did not converge to the estimated model. We projected that 1-year cancer prevalence for all sites would increase from 209 971 to 367 354 for men and from 164 622 to 275 776 for women, that 2-3-year prevalence would increase from 288 284 to 508 731 for men and from 255 684 to 418 630 for women, that 4-5-year prevalence would increase from 216 834 to 379 461 in men and from 211 764 to 342 031 in women, and that 5-year prevalence would increase from 715 089 to 1 255 546 in men and from 632 070 to 1 036 437 in women. This study is the first estimate of cancer prevalence in the future in Japan.
authors.affiliation: Department of Mathematical Health Science (Ohno Research Laboratory), Course of Health Science, Graduate School of Medicine, Osaka University, 1-7 Yamadaoka, Suita, Osaka 565-0871, Japan. nana-t@sahs.med.osaka-u.ac.jp
authors.forename: Nana
authors.initials: N
authors.lastname: Tabata
authors.forename: Yuko
authors.initials: Y
authors.lastname: Ohno
authors.forename: Rieko
authors.initials: R
authors.lastname: Matsui
authors.forename: Hiromi
authors.initials: H
authors.lastname: Sugiyama
authors.forename: Yuri
authors.initials: Y
authors.lastname: Ito
authors.forename: Hideaki
authors.initials: H
authors.lastname: Tsukuma
authors.forename: Akira
authors.initials: A
authors.lastname: Oshima
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D005260:Female; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000453:epidemiology*; D015995:Prevalence; D012042:Registries; D017678:Sex Distribution; D015996:Survival Rate