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Japanese Journal of Clinical Oncology 2009 39(1):71-72; doi:10.1093/jjco/hyn150
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© The Author (2008). Published by Oxford University Press. All rights reserved

Comparison of Time Trends in Stomach Cancer Incidence (1973–2002) in Asia, from Cancer Incidence in Five Continents, Vols IV–IX

Kota Katanoda and Hiroko Yako-Suketomo

Cancer Information Services and Surveillance Division
Center for Cancer Control and Information Services
National Cancer Center
Tokyo, Japan

Time trends of age-standardized rate (ASR) of cancer incidence (ICD-10: C16) were compared among 13 selected cancer registries and ethnic/racial groups in Asia. Data source was the Cancer Incidence in Five Continents Vol. IV-IX (year at diagnosis: 1973–77, 1978–82, 1983–87, 1988–92, 1993–97and 1998–2002, respectively). World population was used for age-standardization. Asia was divided into the following three areas, Eastern Asia, South-Eastern Asia and South-Central and Western Asia. Eastern Asia includes China and Japan; South-Eastern Asia includes Philippines, Singapore and Thailand; South-Central and Western Asia includes India, Israel and Kuwait.

Figure 1 shows time trends of ASR of stomach cancer incidence for males. There was an overall decreasing trend in all three Asian areas, and no increasing trend was observed. Miyagi, Osaka (Japan), Shanghai (China), and Chinese in Singapore had higher ASRs than other registries, among which Miyagi (Japan) had the highest ASR through the observation period. In Eastern Asia, two registries in Japan had higher ASRs than two registries in China. Hong-Kong (China) had lower ASR than Shanghai and Chinese in Singapore. In South-Eastern Asia, Chinese in Singapore had outstandingly higher ASR than the other registries. In South-Central and Western Asia, Jews in Israel and Chennai (India) tended to have higher ASRs than the other two registries, though they were at the same level as the lowest value in Eastern Asia.


Figure 1
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  		Figure 1. Time trends in age-standardized stomach cancer incidence rate (ICD-10: C16) in 13 cancer registries in Asia, males.

 
Figure 2 shows time trends of ASR of stomach cancer incidence for females. Females tended to have lower ASRs than males in all registries (Note that Figure 1 and Figure 2 use different vertical scales.). Females had almost the same patterns of time trends and geographical/ethnic/racial differences as observed for males.


Figure 2
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  		Figure 2. Time trends in age-standardized stomach cancer incidence rate (ICD-10: C16) in 13 cancer registries in Asia, females.

Note: Data were downloaded from IARC CANCER Mondial Statistical Information System (http://www-dep.iarc.fr/). Data were tabulated by the authors of this article. Periods of year at diagnosis were representative, and they included the following exceptions: the first period was 1974–77 for Hong Kong (China), 1975 for Shanghai (China), 1972–76 for Jews (Israel); the second period was 1979–82 for Osaka (Japan), 1982 for Chennai (India), 1977–81 for Jews (Israel), 1979–82 for Kuwait; the third period was 1982–1986 for Jews (Israel); the fourth period was 1988–1993 for Kuwait; the fifth period was 1994–1997 for Kuwait. Note that calculated incidence rates were values averaged across five 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.

 


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This Article
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