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Japanese Journal of Clinical Oncology 2009 39(5):337-338; doi:10.1093/jjco/hyp043
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© The Author (2009). Published by Oxford University Press. All rights reserved

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

Takahiro Higashi

Cancer Screening Research Division
Research Center for Cancer Screening and Prevention
National Cancer Center
Tokyo, Japan

Yuka Hirabayashi

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

We compared time trends of age-standardized rate (ASR) of uterine cancer incidence (ICD-10: C53–C54) across 13 selected cancer registries and ethnic/racial groups in Asia. We obtained data published in the Cancer Incidence in Five Continents, Vols IV–IX (year at diagnosis: 1973–77, 1978–82, 1983–87, 1988–92, 1993–97 and 1998–2002, respectively) and used the world population for age-standardized. Asia was divided into Eastern Asia (Japan and China), South-Eastern Asia (Philippines, Singapore and Thailand) and South-Central and Western Asia (India, Israel and Kuwait).

Figure 1 shows time trends of ASR of cancer incidence in cervix uteri. The ASRs for most groups were decreasing. In Eastern Asia, Hong Kong and Osaka had the highest ASR, but these ASR became about one-third during the 30-year observation period from 1973–77 to 1998–2002. Shanghai and Miyagi, which had the relatively low ASR at the beginning of the observation period has a further decrease, and went into a stable phase in 1983–87. In South-Eastern Asia, ethnic Indians in Singapore had a rapid decrease, whereas other groups had a slower decrease. The ASR among Malays in Singapore was stable until 1983–87 and rose temporarily from 1983–87 to 1988–92. The ASR in Chiang Mai was stable since the start of observation in 1983–87 and gradually increased in 1998–2002. In South-Central and Western Asia, Chennai, India, experienced a rapid decrease in ASR, whereas other regions had a stable trend. The ASR in Israel showed a gradual increase.


Figure 1
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  		Figure 1. Time trends in age-standardized cancer incidence rate of cervix uteri (ICD-10: C53) in 13 cancer registries in Asia, females.

 
In contrast to the decrease in incidence of cervical cancer, the age-standardized incidence rate of uterine corpus cancer increased in the observed groups (Fig. 2). In Eastern Asia, Hong Kong had higher incidence rate throughout the observation period. ASR in all areas increased at the same rate except Osaka, whose increase slowed down over time. In South-Eastern Asia, the ASRs also increased in general except in Chiang Mai, Thailand. Although Malays and ethnic Indians in Singapore experienced a dip in early years (1978–82 to 1983–87), they caught up with other groups in later years in observation. The ASR in Manila, Philippines, was stable from the start of observation to 1993–97 and turned into an upward trend afterwards. Groups in South-Central and Western Asia had a slower increase than other regions, except Jews in Israel, which started at the highest ASR at the beginning and further increased as rapidly as in other increasing areas.


Figure 2
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  		Figure 2. Time trends in age-standardized cancer incidence rate of corpus uteri (ICD-10: C54) 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) and 1972–76 for Jews (Israel); the second period was 1979–82 for Osaka (Japan), 1982 for Chennai (India), 1977–81 for Jews (Israel) and 1979–82 for Kuwait; the third period was 1982–86 for Jews (Israel); the fourth period was 1988–93 for Kuwait; and the fifth period was 1994–97 for Kuwait. 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.

 


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This Article
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