Time trends and age-period-cohort analyses on incidence rates of thyroid cancer in Shanghai and Hong Kong

摘要: Increasing incidence rates of thyroid cancer have been noted worldwide, while the underlying reasons remain unclear. Using data from population-based registries, we examined time trends in two largest cities China, Shanghai and Hong Kong, during periods 1973–2009 1983–2011, respectively. We further performed age-period-cohort analyses to address possible for observed temporal trends. continuous increases since 1980s, addition higher 1970s both sexes Shanghai. The age-standardized rate increased by 3.1% [95% confidence interval (CI): 1.0%, 5.1%] 3.8% (95% CI: 1.9%, 5.7%) per year on average, respectively, men women period 1973–2009, it 2.2% 1.5%, 2.8%) 2.7% (1.6%, 3.8%) Kong 1983–2011. global changes across all age groups similar ways, varied different generations (birth cohorts). these Chinese populations recent decades may be contributable a combination introduction more sensitive diagnostic techniques increasing prevalence environmental exposures populations.