摘要Objective:Liver cancer is a major health concern globally and in China.This analysis investigated deaths and disability-adjusted life years(DALYs)with respect to etiologies and risk factors for liver cancer in China and worldwide.Methods:Global and China-specific data were collected on liver cancer deaths,DALYs,and age-standardized rates(ASRs)from the Global Burden of Disease Study 2019 database.Liver cancer etiologies were classified into five groups and risk factors were categorized into three levels.Each proportion of liver cancer burden was calculated in different geographic regions.The joinpoint regression model were used to assess the trends from 1990-2019.Results:Liver cancer accounted for 484,577 deaths worldwide in 2019 with an ASR of 5.9 per 100,000 population.China had an elevated liver cancer death ASR in 2019 and males had an ASR 1.7 times the global rate.The global ASR for DALYs peaked at 75-79 years of age but peaked earlier in China.Hepatitis B virus was the prominent etiology globally(39.5%)and in China(62.5%),followed by hepatitis C virus and alcohol consumption.In high sociodemographic index countries,non-alcoholic steatohepatitis has gained an increasing contribution as an etiologic factor.The liver cancer burden due to various etiologies has decreased globally in both genders.However,metabolic risk factors,particularly obesity,have had a growing contribution to the liver cancer burden,especially among males.Conclusions:Despite an overall decreasing trend in the liver cancer burden in China and worldwide,there has been a rising contribution from metabolic risk factors,highlighting the importance of implementing targeted prevention and control strategies that address regional and gender disparities.