Background And Purpose: This study aims to assess the disease burden and care quality along with cross-country inequalities for stroke at global, regional, and national levels from 1990 to 2021.
Methods: Data on stroke were extracted from the Global Burden of Disease (GBD) study 2021 for the globe, five sociodemographic index (SDI) regions, 21 GBD regions, and 204 countries/territories. The disease burden was quantified using the age-standardized disability-adjusted life years rate (ASDR). Quality of care (QoC) was evaluated through the age-standardized QoC index (QCI). To assess cross-country disparities in both disease burden and age-standardized QCI, the slope index of inequality (SII) and the concentration index were utilized.
Results: From 1990 to 2021, the global ASDR of stroke decreased from 3078.95 (95% uncertainty interval [UI]: 2893.58, 3237.34) to 1886.20 (95% UI: 1738.99, 2017.90) per 100,000 population, while the age-standardized QCI improved from 50.79 to 64.61. However, the results of inequalities showed worsening inequalities in both ASDR and QCI, with lower SDI countries shouldering a disproportionate burden and higher SDI countries maintaining higher QoC. The SII and concentration index for ASDR indicated a worsening inequality among lower SDI countries, with SII increasing to -2616.44 and the concentration index increasing to -0.1119 in 2021. Meanwhile, the SII and concentration index for age-standardized QCI showed a worsening inequality among higher SDI countries, with SII of 27.48 and concentration index of 0.0922 in 2021.
Conclusions: Despite notable global advancements, significant disparities in stroke still exist, particularly in lower SDI regions facing high disease burdens and substandard care.
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