ENOrphanet Journal of Rare Diseases | Global Burden Trends of Motor Neuron Disease from 1990 to 2046
Date: April 05, 2025
Classification: Frontiers
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Based on GBD 2021 data, this study systematically analyzed the changing trends in the burden of motor neuron disease (MND) at global, regional, and national levels, and projected the burden up to 2046. The research highlights the significant impact of population aging and higher SDI levels on the MND burden, while also revealing increasing disparities between countries, offering critical insights for global health policy.
Literature Overview
This article, titled The global burden of motor neuron disease: a systematic and additional analysis of global burden disease study 2021, published in the Orphanet Journal of Rare Diseases, reviews and summarizes the epidemiological burden of motor neuron disease (MND) from 1990 to 2021, and further predicts trends up to 2046. Using trend, decomposition, inequality, frontier, and prediction methods, the study evaluates changes in incidence, prevalence, mortality, and DALYs across regions, genders, and age groups. The research emphasizes that population growth and aging are the main drivers of the increasing MND burden, and notes a significant rise in burden in high SDI areas, with widening disparities between countries. The APC model reveals contributions of age, period, and birth cohort effects to DALYs, while frontier analysis suggests that some high SDI countries perform poorly, indicating that socioeconomic development may not effectively reduce MND burden.
Background Knowledge
Motor neuron disease (MND) is a group of rare neurodegenerative disorders characterized by progressive degeneration of motor neurons, with amyotrophic lateral sclerosis (ALS) being the most common subtype. MND typically occurs in middle to old age, with higher incidence in males, and exhibits notable geographic variation. Although previous studies have explored some epidemiological features of MND, data gaps remain in understanding global trends, disparities between countries, and future burden projections. The Global Burden of Disease (GBD) study provides a systematic approach to quantify MND burden across regions and identify influencing factors. This study applies EAPC, APC, decomposition, frontier, and inequality analyses to explore the drivers behind MND burden, gender and age disparities, and cross-country inequalities, while forecasting future trends. Current research challenges include accurately distinguishing MND subtypes, missing data in certain regions, inconsistent diagnostic criteria, and the applicability of predictive models. Thus, this study not only offers the latest global MND burden analysis but also provides a scientific basis for targeted public health policies.
Research Methods and Findings
This study utilized GBD 2021 data and applied EAPC, APC, decomposition, frontier, and inequality analyses to systematically evaluate the global, regional, and national incidence, prevalence, mortality, and DALYs of MND from 1990 to 2021. It further predicted disease burden trends up to 2046 and conducted frontier analysis using LOESS regression and bootstrapping to assess the lowest achievable disease burden benchmarks at various SDI levels.
Key Findings and Insights
Significance and Future Directions
This study provides the most comprehensive and longest temporal analysis of global MND burden, revealing the complex relationship between demographic changes, socioeconomic status, and disease burden. The findings offer valuable references for public health policy-making, early diagnosis, and international collaboration. Future studies should explore genetic and environmental risk factors and improve predictive accuracy by integrating clinical data.
Conclusion
This study systematically analyzed the epidemiological trends of global MND burden from 1990 to 2021 and predicted future directions up to 2046. Although age-standardized rates remain largely stable, population growth and aging have significantly increased the absolute burden of MND. High SDI regions generally exhibit higher burden, and disparities between countries are widening, suggesting the need for more targeted public health policies. The study also revealed age and birth cohort effects, indicating that later generations face lower MND risk, likely due to improved healthcare. Future research should integrate genetic, environmental, and lifestyle factors to further understand MND heterogeneity and promote global collaboration for better diagnosis and treatment. Overall, MND remains an increasingly pressing global health challenge, especially in aging societies, necessitating early allocation of healthcare resources to address the rising burden.
