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Japanese Journal of Clinical Oncology 2008 38(4):324-325; doi:10.1093/jjco/hyn028
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© The Author (2008). Published by Oxford University Press. All rights reserved

Comparison of Time Trends in Larynx Cancer Incidence (1973–97) in East Asia, Europe and 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
Tokyo, Japan

Time trends of age-standardized rate (ASR) of larynx cancer incidence (ICD-10: C32) 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, 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 larynx cancer incidence for males. In East Asia, Hong Kong showed a higher ASR compared with the other regions. The ASR was decreasing continuously through all observed periods in Hong Kong. No clear difference was seen between the three regions of Japan (Miyagi, Nagasaki and Osaka) and Shanghai. In the Europe region, the ASRs of Varese (Italy) and Bas-Rhin (France) were higher than those in other region. In these two regions, the ASRs were continuously decreasing in Varese (Italy) during the observed periods and started to decrease in Bas-Rhin (France) after 1983–87 period. In the USA, the ASR of black (SEER) was higher compared with those of other races. The decrease in the ASR among black (SEER) was observed in 1993–97 period. The ASR in white (SEER) was lower than those in black, but was higher than those in Asian races and was decreasing after 1978–82 period.


Figure 1
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  		Figure 1. Time trends in age-standardized larynx cancer incidence rate (ICD-10: C32) in 18 cancer registries in East Asia, Europe and USA, males.

 
Figure 2 shows time trends of ASR of larynx cancer incidence for females. The ASR for female was much lower than those for male. Note that the scale in Fig. 2 is different from Fig. 1. In East Asia, similar to male, Hong Kong showed a higher ASR compared with the other regions. The ASR decreased remarkably after 1978–82 period in Hong Kong. In the Europe region, ASR of Denmark was higher than those in other region. Decreasing trend was observed after 1983–87 period in Denmark. ASRs of Varese (Italy) and Bas-Rhin (France) was not as high as those of other regions except for Denmark. In the USA, the ASR of black (SEER) was remarkably high compared with those in other races and countries. The decrease in the ASR among black (SEER) was observed in 1993–97 period. The ASR of white (SEER) was secondary highest. The ASRs of Asian races in USA seemed to be similar or slightly lower than those in the Asian regions.


Figure 2
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  		Figure 2. Time trends in age-standardized larynx cancer incidence rate (ICD-10: C32) 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 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. 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.

 


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This Article
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