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Japanese Journal of Clinical Oncology 2007 37(10):802-803; doi:10.1093/jjco/hym141
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© 2007 Foundation for Promotion of Cancer Research

Comparison of Time Trends in Ovary Cancer Incidence (1973–1997) in East Asia, Europe, and the USA, from Cancer Incidence in Five Continents Vols IV–VIII

Tomomi Marugame and Yuka Hirabayashi

Cancer Information Services and Surveillance Division Center for Cancer Control and Information Services National Cancer Center

Time trends of age-standardized rate (ASR) of ovary cancer incidence [ICD-10: ovary (C56)] were compared among 18 selected cancer registries and ethnic/racial groups in East Asia, Europe, and the USA. Data source was the Cancer Incidence in Five Continents Vols IV–VIII (years at diagnosis: 1973–77, 1978–82, 1983–87, 1988–92, and 1993–97, respectively). World population was used for age standardization.

Figure 1 shows time trends of ASR of ovary cancer incidence. East Asian regions showed a lower ASR as compared with SEER White (USA), SEER Black (USA), and regions in Europe. ASRs in Miyagi, Nagasaki, Osaka (Japan), Shanghai and Hong Kong (China) showed increasing trend from 1973–77 to 1993–97.


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  		Figure 1. Time trends in age-standardized ovary cancer incidence rate (ICD-10: C56) in 18 cancer registries in East Asia, Europe, and the USA. Note: data were downloaded from IARC CANCER Mondial Statistical Information System (http://www-dep.iarc.fr/). Data of number of incidence and population for Vols. IV–VIII were extracted from the file named CI5I-VIII_September_2005.ZIP and tabulated by the authors of this article. Periods of year at diagnosis were representative, and they included the following exceptions: the first period was 1975 for Shanghai (China), 1974–77 for Hong Kong (China), 1975–77 for Bas-Rhin (France), 1973–76 for West Midlands (England); the second period was 1979–82 for West Midlands (England); the first period (1976–77) of Varese (Italy) was excluded because there were no data for several age groups. Note that calculated incidence rates were values averaged across 5 years, which could have rounded rapid annual changes (a spike or drop). Responsibility for this presentation and interpretation lies with the authors of this article. LA, Los Angeles; SEER, Surveillance Epidemiology and End Results.

 
ASRs in any regions in Europe showed higher as compared with those in East Asian regions. Sweden and Denmark showed a decreasing trend during the overall study period. Bas-Rhin (France), Varese Province (Italy), South Thames (England), and West Midlands (England) showed a decreasing trend after 1983–88.

SEER White showed the highest ASRs in the USA. ASRs in SEER White, SEER Black, Los Angeles (LA) Japanese, and LA Chinese showed decreasing trend. ASRs during the study period did not show obvious decreasing or increasing trend in Hawaii Japanese, Hawaii Chinese, and LA Korean.


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This Article
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