Analysis of the burden of gastric cancer and the fractions and trends attributed to population aging in China and the world
Objective To analyze the burden of stomach cancer,along with the associated fractions and trends,attributable to population aging,adult population size,age-specific incidence,and case fatality rate in both China and the global popu-lation from 1990 to 2019.Methods The incidence,mortality,and corresponding population of gastric cancer among peo-ple aged 25 years in China and the world were extracted from the Global Disease Burden Study database from 1990 to 2019.Taking the cancer deaths in 1990 as a reference,factor decomposition method was used to calculate the total num-ber,male and female gastric cancer deaths over the years attributable to population aging,adult population size,age-spe-cific incidence,and case fatality rate of gastric cancer from 1990 to 2019.The proportion of attributable deaths from gas-tric cancer to the total number of deaths from gastric cancer that year and its temporal trend were calculated.Results Be-tween 1990 and 2019,the number of new cases of gastric cancer among individuals aged 25 years and older witnessed an increase from 317 300 to 612 800 in China,and from 883 300 to 1 269 800 globally.Correspondingly,the number of deaths due to gastric cancer also rose from 305 500 to 421 500 in China and from 788 300 to 957 200 worldwide during the same period.In China,the burden of stomach cancer attributed to population aging,adult population size,age-specific incidence,and case fatality rate accounted for 143 800(34.15%of total stomach cancer deaths in 2019),200 500(47.61%),-83 800(-19.89%),and-143 500(-34.08%)respectively.Comparatively,in the global context,stom-ach cancer deaths attributable to population aging,adult population size,age-specific incidence,and case fatality rate a-mounted to 184 500(19.33%),507 200(53.13%),-342 100(-35.83%),and-179 600(-18.81%)respectively.The impact of aging on stomach cancer deaths and its fractions has seen a rapid increase since 1995,while the estimates were on a downward trend before 1995.Notably,the number of stomach cancer deaths attributed to aging and its fraction has been consistently rising on a global scale.The burden of stomach cancer in China was more significantly influenced by aging than globally.Conclusions The burden of gastric cancer attributed to population aging is progressively increasing.Compared with the world,the population ageing process in China was one of the major contributors to the increase in stomach cancer burden in recent years,and has a tendency to outweigh the impact of population growth.Consequently,promoting activities aimed at healthy aging becomes crucial for effective cancer prevention and control strategies.