Spatial Analysis of Global Prevalence of Multiple Sclerosis Suggests Need for an Updated Prevalence Scale

Table 1

Sample table of MS prevalence secondary sources and case ascertainment methods.

Region and journal reference	Prevalence data (per 100,000)	Prevalence year	Criteria for diagnosis	Case ascertainment method(s)
Canada [14]	Atlantic Region: 350; Quebec: 180; Ontario: 230; Prairie Region: 340; British Columbia: 240	2000-2001	Self-report	Canadian; Community; Health Survey; 1.1
United States [15]	Western Region: 97.5; Midwestern Region: 96.0; Northeastern Region: 96.5; Southern Region: 65.5	1982–1996	Self-report	National; Health; Interview; Survey
Russia [16]	35–70	2000	Unknown	Multiple; Sources