Past analyses of mortality data from mesothelioma relied on unspecific codes,
such as pleural neoplasms. We calculated temporal trends in age-specific
mortality rates in Canada, the United States, Japan, France, Germany, Italy, the
Netherlands, Poland, the United Kingdom, and Australia on the basis of the 10th
version of the International Classification of Diseases, which includes a
specific code for mesothelioma. Older age groups showed an increase (in the
United States, a weaker decrease) during the study period, whereas in young age
groups, there was a decrease (in Poland, a weaker increase, starting, however,
from low rates). Results were consistent between men and women and between
pleural and peritoneal mesothelioma, although a smaller number of events in
women and for peritoneal mesothelioma resulted in less precise results. The
results show the heterogeneous effect of the reduction of asbestos exposure on
different age groups; decreasing mortality in young people reflects reduced
exposure opportunity, and increasing mortality in the elderly shows the
long-term effect of early exposures.