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