The global, regional, and national burden of myocarditis in 204 countries and territories, 1990–2021: Results from the Global Burden of Disease Study 2021

Aims To estimate the global burden of myocarditis in the general population from 1990 to 2021. Methods and results Data on myocarditis were retrieved from the Global Burden of Disease Study 2021. Incidence, deaths, and disability‐adjusted life years (DALYs), along with their age‐standardized rates (ASRs) per 100 000 population, were used to measure the burden of myocarditis. Global, regional, and national analyses were performed for the period between 1990 and 2021. Further sub‐analyses were conducted based on age group, sex, and sociodemographic index (SDI). In 2021, there were 1.3 million (95% uncertainty interval [UI]: 1.1 to 1.6) incident cases, 31.7 thousand (95% UI: 25.5 to 37.1) deaths, and 96.3 thousand (95% UI: 79.6 to 114.8) DALY cases globally. The ASRs of incidence, death, and DALYs significantly decreased from 1990 to 2021, with percentage changes of −3.9% (95% UI: −4.7% to −2.9%), −28.2% (95% UI: −42.2% to −12.5%), and −37.8% (95% UI: −50.5% to −24.3%), respectively. The global burden of myocarditis was higher in males, children, and the elderly. Additionally, the burden of myocarditis varied widely across different SDI regions, with high SDI regions having the highest ASR of incidence, and high‐middle SDI regions having the highest ASRs of deaths and DALYs. Conclusion Although the ASRs of incidence, deaths, and DALYs significantly decreased from 1990 to 2021, the global number of incidences, deaths, and DALYs increased substantially. Certain populations, including males, children, the elderly, and regions with advanced sociodemographic levels, experienced a heavier burden of myocarditis.