Global burden of ischemic stroke attributable to high body mass index in 204 countries and territories, 1990-2021

Background A high body mass index (hBMI) is one of the major risk factors for ischemic stroke (IS), although independent estimates of the global burden and trend of IS attributable to hBMI are unclear. Methods Study data were extracted from the Global Burden of Diseases, Injuries, and Risk Factors Study and analysed by age, sex, year, and geographical location. The sociodemographic index (SDI) and the human development index (HDI) were used as indicators of national socioeconomic status. Geographic distributions and trends were assessed by calculating the estimated annual percentage change (EAPC). Associations between the age-standardized death rate (ASMR) or disability-adjusted life year rate (DALY) and socioeconomic status were analysed. Results Deaths and DALYs increased worldwide from 1990-2021, with increases of 95.74% for the former and 133.00% for the latter; the ASMR and ASDR decreased, with an ASMR and ASDR-related EAPCs of -1.10 (95% CI: -1.24--0.96) and 0.04 (95% CI:-0.47-0.55), respectively; women had greater numbers of deaths and DALYs, and the majority of deaths and DALYs were shared by those aged >= 70. The highest burden rates were shared by Eastern Europe, North Africa, the Middle East, and Central Asia. The ASMR-related EAPCs were associated with the ASMR in 1990 (R = -0.35, P < 0.001) and the SDI in 2021 in different countries (R = -0.66, P < 0.001); these patterns were similar to those of the ASDR; the HDI in 2021 was associated with the ASMR-related EAPC (R = -0.71, P < 0.001) and the ASDR-related EAPC in different countries (R = -0.71, P < 0.001). Conclusions The number of deaths and DALYs from ischemic stroke attributable to hBMI worldwide increased substantially from 1990-2021. Successful population-wide initiatives targeting hBMI may mitigate a wide range of burdens on this disease. Taking into account variations in the SDI burden, future prevention and control strategies must be developed and implemented according to country-specific development status.