Epidemiology of multiple sclerosis: global trends, regional differences, and clinical implications.

Abstract

Introduction: Multiple sclerosis (MS) is one of the most common chronic neurological diseases. It predominantly affects young adults. Recent advances in diagnostic and therapeutic approaches have led to increased recognition and reporting of the disease.

State of the art: Global MS prevalence varies significantly by region, and is influenced by environmental, genetic, and healthcare factors. Higher rates are observed in northern latitudes, which has been linked to reduced sunlight exposure and vitamin D deficiency. Advances in diagnostic tools, particularly MRI, have contributed to earlier detection and increased incidence rates.

Clinical implications: Gender and age differences in MS epidemiology highlight unique challenges in management. Women are more frequently affected, while men tend to experience a more severe disease course. Paediatric and late-onset MS forms require distinct diagnostic and treatment strategies.

Future directions: Research should prioritise understanding regional and demographic variability, the role of genetic-environmental interactions, and the long-term impact of new therapies. Improved global access to healthcare and advanced diagnostics is crucial for addressing disparities in MS management.