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Japanese Journal of Clinical Oncology 2008 38(6):456-457; doi:10.1093/jjco/hyn044
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© The Author (2008). Published by Oxford University Press. All rights reserved

Comparison of Time Trends in Lip Cancer Incidence (1973–97) in East Asia, Europe and USA, from Cancer Incidence in Five Continents, Vols IV–VIII

Hiroko Yako-Suketomo and Tomomi Marugame

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 lip cancer incidence (ICD-10: C00) were compared among 18 selected cancer registries and ethnic/racial groups in East Asia, Europe and USA. The 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 the ASR of lip cancer incidence for males. The ASRs in East Asia, East Asian immigrants and blacks (SEER) in USA were lower than those in Europe and whites (SEER) in USA. The ASRs in Europe showed a decreasing trend. Registries in Europe can be classified into three groups: Denmark was high, Varese (Italy) and Sweden were in the middle and Bas-Rhin (France) and two registries in England (South Thames and West Midlands) were at low levels in the ASRs. The ASRs in whites (SEER) in USA dramatically decreased. The ASRs in whites (SEER) in USA showed higher than those in blacks (SEER) and East Asian immigrants in USA. The ASRs for East Asian immigrants (Hawaii and Los Angeles) were as low as those in their homelands.


Figure 1
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  		Figure 1. Time trends in age-standardized lip cancer incidence rate (ICD-10: C00) in 18 cancer registries in East Asia, Europe and USA, males.

 
Figure 2 shows time trends of the ASR of lip cancer incidence for females. The ASRs for females were approximately one-fifth to one-tenth of those for males. Note that the vertical scale in Fig. 2 is different from that in Fig. 1. The ASRs for females were so low that they tended to have unstable values. Denmark and Sweden in Europe and whites (SEER) in USA showed higher ASRs than the other registries. Sweden in Europe consistently showed an increasing trend.


Figure 2
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  		Figure 2. Time trends in age-standardized lip cancer incidence rate (ICD-10: C00) in 18 cancer registries in East Asia, Europe and USA, females.

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 the 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.

 


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This Article
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