Demographic and clinical data for patients with multiple sclerosis on prevalence day, 1 January 2013
| n | Per cent | Mean age at onset (years) | p Value | |
|---|---|---|---|---|
| Diagnostic classification | ||||
| Poser | ||||
| Definite MS | 493 | 47.6 | 31.7 | 0.97 |
| Probable MS | 112 | 10.8 | 33.0 | |
| McDonald | 430 | 41.5 | 31.5 | |
| Course of disease at onset | ||||
| Remitting–relapsing MS | 950 | 91.8 | 30.7 | 0.065 |
| Primary–progressive MS | 85 | 8.2 | 43.8 | |
| Gender | ||||
| Women | 660 | 63.8 | 33.4 | 0.35 |
| Men | 375 | 36.2 | 34.3 | |
| Total | 1035 | 31.8 | ||
MS, multiple sclerosis.