CANCER INCIDENCE IN JAPAN, 1985-89 - REESTIMATION BASED ON DATA FROM 8 POPULATION-BASED CANCER REGISTRIES

The Research Group for Population-based Cancer Registration in Japan h as been conducting a cooperative study to estimate cancer incidence in Japan since 1975. Estimated incidence data calculated annually were a ccumulated in 1996 for 18 years. The Group has separately provided ano ther re-calculated incidence estimate series which were prepared for 1 975-79, 1980-84 and 1985-89. The former two results, each of five year s were previously published elsewhere. These recalculated estimate ser ies made more reliable observations of time trends in incidence feasib le by using the same eligible registries' data throughout each 5-year period. This report presents results of the latter 5 years between 198 5 and 1989; age-specific, crude and age-standardized incidence rates, as well as the number of incidence according to site and gender, under the cooperation of eight eligible population-based cancer registries in Japan: Miyagi, Yamagata, Kanagawa, Fukui, Osaka, Tottori, Hiroshima City and Nagasaki City, incidence in Japan was estimated at 187 200 a nd 150 700 for ail cancer sites among males and among females, respect ively in 1985 and 216 700 and 166 900, respectively, in 1989. The lead ing site was the stomach among both males and females from 1985 to 198 9. Among males the second leading sits was the lung, followed by the l iver, colon and rectum. Among females, it was the breast, followed by the colon, uterus and lung in 1989. The proportion of the cases regist ered by a death certificate only for ail sites was 14.0-15.7 and 13.7- 15.3% and the ratio of incidence to mortality was 1.69-1.73 and 1.95-2 .01 among males and females, respectively, during the period.