Prevalence and Incidence

Multiple Sclerosis, MS

Prevalence

Multiple Sclerosis (MS) is one of the most common neurological disorders in the United States. The prevalence of MS refers to the total number of people living with the disease at a given time. Recent estimates suggest that approximately 1 million people in the United States are living with MS. This estimate comes from studies conducted by the National Multiple Sclerosis Society and researchers, and it indicates a higher prevalence than previously thought. 

• Prevalence Rate: MS affects roughly 309 cases per 100,000 people in the United States, though the exact number varies by region, gender, and ethnic background. MS is more common in women than men, with a 3:1 female-to-male ratio. 

Incidence:

The incidence of MS refers to the number of new cases diagnosed each year. The incidence rate in the U.S. has been difficult to determine with high accuracy due to varying diagnostic practices, but it is estimated that there are around 10,000 to 15,000 new cases diagnosed each year. 

• Incidence Rate: Approximately 4 to 7 new cases per 100,000 people are diagnosed annually in the U.S.