OBJECTIVE: To estimate the global burden of bone cancer from 1990 to 2023 and forecast future trends to 2050.

DESIGN, SETTING, AND PARTICIPANTS: This systematic analysis estimated bone cancer incidence, mortality, and disability-adjusted life-years (DALYs) in 204 countries and territories grouped by GBD super-regions and World Bank income groups from 1990 to 2023, with forecasts through 2050. Individuals of all ages with bone cancers included in the GBD 2023 study were included in analyses. Data were analyzed from June 2023 to July 2025.

MAIN OUTCOMES AND MEASURES: The GBD 2023 study used standardized estimation methods to describe bone cancer incidence, mortality, and DALYs in 2023, as well as trends over the past 3 decades and forecasts through 2050. All estimates are presented with 95% uncertainty intervals (UIs), and age-standardized rates (ASRs) were calculated using GBD-specific age weights.

RESULTS: In 2023, there were 111 000 (95% UI, 81 300-164 000) malignant bone cancer cases, 76 600 (95% UI, 60 700-96 300) deaths, and 3.02 million (95% UI, 2.29 million-3.96 million) DALYs globally. A bimodal age distribution was noted in both incidence (peaking at ages 10 to 14 years and 65 to 69 years) and mortality (peaking at ages 15 to 19 years and 65 to 69 years). The highest ASRs for incidence were in Southeast Asia, East Asia, and Oceania (1.6 per 100 000; 95% UI, 1.1-2.4), while Sub-Saharan Africa had the highest ASRs for DALYs (51.0 per 100 000; 95% UI, 27.7-79.7). By World Bank income group, upper-middle-income countries had the highest ASRs for incidence, whereas low-income countries exhibited the highest ASRs for both mortality and DALYs. Globally, incident cases, deaths, and DALYs increased from 1990 to 2023, while global mortality and DALY ASRs were relatively stable; high-income countries experienced a decline in mortality and DALY ASRs. Forecasts suggest a potential increase in global cases and deaths by 2050.

OBJECTIVES: To estimate the global, regional, and national burden of ischemic heart disease and ischemic stroke attributable to elevated LDL-C (relative to 35-54 mg/dL) from 1990 to 2023 and to quantify the contributions of population growth, aging, risk-deleted burden, and exposure changes to burden trends.

DESIGN, SETTING, AND POPULATION: This comparative risk assessment, part of the Global Burden of Disease Study 2023, estimated population-level LDL-C exposure and associated health loss in 204 countries and territories. Mean LDL-C levels were estimated using spatiotemporal gaussian process regression based on 806 studies across 161 countries. Relative risks were derived from meta-analyses of 38 randomized clinical trials. Population-attributable fractions for deaths and disability-adjusted life-years (DALYs) were estimated by age and sex for adults aged 25 years or older from 1990 to 2023, with 95% uncertainty intervals.

EXPOSURE: Population-level LDL-C concentrations.

MAIN OUTCOMES AND MEASURES: Population-attributable fractions, counts, and rates (all ages and age standardized per 100 000) of LDL-C-attributable deaths and DALYs from ischemic heart disease and ischemic stroke, with uncertainty intervals.

RESULTS: In 2023, elevated LDL-C accounted for 3.6 million deaths (95% uncertainty interval, 2.2-5.4 million; 6.0% of global mortality) and 90.7 million DALYs (95% uncertainty interval, 58.9-123.3 million; 3.2% of DALYs). Although global all-ages rates remained stable, age-standardized death and DALY rates decreased by 45.6% and 39.5%, respectively, since 1990. In 2023, age-standardized LDL-C-attributable DALY rates were highest in Eastern Europe and lowest in high-income Asia-Pacific. One-third of the global LDL-C burden occurred in India and China. Population growth and aging drove the increasing burden, with notable regional disparities in LDL-C exposure and risk-deleted DALY rates shifting toward middle-sociodemographic settings.