© The Author (2008). Published by Oxford University Press. All rights reserved
Comparison of Time Trends in Pancreatic Cancer Incidence (1973–97) in East Asia, Europe and USA, from Cancer Incidence in Five Continents Vol. IV–VIII
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 pancreatic cancer incidence (ICD-10: C25) were compared among 18 selected cancer registries and ethnic/racial groups in East Asia, Europe and USA. Data source was the Cancer Incidence in Five Continents Vol. IV–VIII (years at diagnosis: 1973–77, 78–82, 83–87, 88–92 and 93–97, respectively). World population was used for age–standardization.
Figure 1 shows time trends of ASR of pancreatic cancer incidence for males. In East Asia, Miyagi Nagasaki and Osaka (Japan) showed higher ASRs than Shanghai Hong Kong (China). The three registries in Japan and Shanghai showed an increasing trend from 1973–77 to 1988–92, and thereafter leveled off or slightly decreased. Hong Kong did not show a clear tendency. In Europe, Denmark, Sweden and South Thames (England) showed a decreasing trend, whereas Varese (Italy) showed an increase in trend and became the highest of the six European registries in the most recent period (1993–97). The ASRs of Bas–Rhin (France) were the lowest level of the six European registries in 1973–77, increased from 1978–82 to 1983–87, and became the middle level in 1993–97. West Midlands (England) did not show a clear tendency. In USA, Black (SEER) showed higher ASRs than White (SEER) and East Asian immigrants. Chinese immigrants in Los Angels (LA) tended to show lower ASRs than the other registries. Japanese immigrants showed a similar level of ASRs to the Japanese in their homeland. White and Black (SEER) showed a decreasing trend.
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Figure 2 shows time trends of ASR of pancreatic cancer incidence for females. Compared with males, females tended to have lower ASRs. In East Asia, the ASRs of the three registries in Japan tended to be higher than the two registries in China, though Shanghai showed a relatively sharp increase and reached the same level as Japan in 1993–97. In Europe, the observed pattern was similar to that for males, though an increase in South Thames (England) and an increase in Varese (Italy) were not so clear as observed for males. In USA, the ASRs of Black (SEER) were highest and those of Chinese immigrants in LA were the lowest during almost all periods, as observed for males. Japanese immigrants in Hawaii showed an increasing trend until 1988–92, whereas Chinese immigrants in Hawaii showed a decreasing trend until 1988–92. Similar to the pattern for males, there was no clear difference between the ASRs of Japanese immigrants in USA and those in their homeland.
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Note: Data were downloaded from IARC CANCER Mondial Statistical Information System (http://www-dep.iarc.fr/). Data of number of incidence and population for Vol. 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; the first two periods of Korean (LA) were excluded because the values were unstable. Note that the calculated incidence rates were values averaged across 5 years, which could have rounded rapid annual changes (a spike or drop). The responsibility for this presentation and interpretation lies with the authors of this article. LA: Los Angeles, SEER: Surveillance Epidemiology and End Results.
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