© 1990 Oxford University Press
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Age-Period-Cohort Analysis of Pancreatic Cancer Mortality in Taiwan, 19711986
Institute of Public Health, College of Medicine, National Taiwan University 1 Jen-Ai Road, Sec. 1, Taipei, Taiwan, Republic of China
Reprint requests: R S Lin at above address.
Interest has recently emerged about the increasing trend of pancreatic cancer mortality in Taiwan, particularly in the elderly. The mortality data of pancreatic cancer over the period 19711986 for males and females aged 4084 in Taiwan were analysed using a log-linear Poisson model to examine the effects of age, calendar period of death, and birth cohort. This age-period-cohort model provides a summary guide for the reading and interpretation of cancer mortality trends. Age is the strongest factor in predicting pancreatic cancer mortality according to the models; the oldest age group 8084 years old has 14.5 times the risk of the youngest age group 4044. The cohort effect is also of particular interest because the generation at greatest risk for pancreatic cancer in both sexes, is the one born between 1917 and 1926, and a declining trend is observed thereafter for more recent cohorts. Parameters of the period factor show no observable trend before 1975, followed by a significantly increasing risk in the subsequent time period. However, the drop of pancreatic cancer mortality over all age groups between 198586 is puzzling and a further study to monitor the secular trends in the following years is warranted.
Received 1 March 1990
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