Fig. 3

ASR-DALY health inequality index for young people with COPD in 1990 and 2021, based on the SDI of 204 countries and regions globally. (A) Slope Index (numbers in parentheses represent the slope); (B) Concentration Index. Each country or region is represented by a solid dot, with larger dots indicating higher population sizes. For comparison, China is highlighted. SDI, Sociodemographic Index; ASR, Age-Standardized Rate; DALY, Disability-Adjusted Life Year