ObjectivesTo analyze the trend of incidence and mortality of bladder cancer from 1990 to 2017 and the effects of age, time period and birth cohort on bladder cancer incidence and mortality.MethodsData on age-standardized incidence rate (ASIR) and age-standardized death rate (ASDR) of bladder cancer from 1990 to 2017 were extracted from the Global Burden of Disease 2017 (GBD 2017) database. Joinpoint regression model was used to analyze the average annual percentage change of ASIR and ASDR of bladder cancer. The age-period-cohort model was established to analyze the age, period and birth cohort effects on ASIR and ASDR of bladder cancer.ResultsFrom 1990 to 2017, both ASIR and ASDR of bladder cancer decreased slightly. ASIR decreased from 6.42 per 100 000 in 1990 to 6.04 per 100 000 in 2017, with an average annual percentage change of −0.9% (−1.0% to −0.8%), and ASDR decreased from 3.15 per 100 000 in 1990 to 2017 2.57/100 000, with an average annual percentage change of −0.4% (−0.4% to −0.3%). The age-period-cohort model results showed that as age increased, the risk of bladder cancer incidence and mortality increased; as the birth cohort progressed, the risk of bladder cancer morbidity and mortality decreased. The time period had little effect on the incidence and mortality of bladder cancer.ConclusionsThe incidence and mortality of bladder cancer are declining globally. On the other hand, the increase of the aging global population could reverse the incidence and mortality trend, active measures should be taken to address the adverse effects of aging.
Objective To analyze the spatiotemporal evolution characteristics of the disease burden of esophageal cancer in China from 2001 to 2021, and provide scientific evidence for optimizing public health intervention strategies. Methods Data were derived from the Global Burden of Diseases (GBD 2021) database, extracting indicators including incidence, prevalence, mortality, disability-adjusted life year (DALY) rate, and years of life lost (YLL) rate for esophageal cancer in China. The Joinpoint regression model was employed to assess long-term trends in disease burden across genders and age groups, combined with age-standardization using the GBD world standard population. Average annual percentage change (AAPC) and 95% confidence intervals (CI) were calculated, and Excel 2019 was used for data collation and descriptive statistics. Results In 2021, the crude incidence, prevalence, and mortality rates of esophageal cancer in China were 22.55, 38.37, and 20.26 per 100 000 population, respectively, representing increases of 13.49%, 23.41%, and 1.30% compared to 2001. The DALY and YLL rates were 450.14 and 436.29 per 100 000, decreasing by 18.01% and 16.10% over the same period. Significant gender disparities were observed, with males exhibiting higher age-standardized incidence, prevalence, mortality, DALY, and YLL rates than females. In 2021, the male age-standardized incidence (34.29/100 000) and mortality (31.06/100 000) rates were 3.3 and 3.5 times those of females, respectively. Disease burden increased exponentially with age, peaking in the 70 to 74-year-old group for incidence, prevalence, and DALY rates, with males showing significantly higher values than females. Trend analysis of standardized rates revealed significant declines from 2001 to 2021, with AAPC values of −2.03% for incidence, −1.42% for prevalence, −2.57% for mortality, and −2.84% for DALY rate (all P<0.05). Conclusion The age-standardized disease burden of esophageal cancer in China has decreased over the past two decades, while crude rates have continued to rise, with a pronounced burden among males and older populations. Against the backdrop of accelerating population aging, targeted early screening, behavioral interventions, and optimized resource allocation are imperative to address the challenges in preventing and controlling esophageal cancer.