Diagnostic classification of prevalent patients in the Leeds Health Authority
| Poser classification | No (%) | Prevalence (/105) |
|---|---|---|
| Clinically definite | 320 (45) | 43.7 |
| Laboratory supported definite | 63 (9) | 8.6 |
| Clinically probable | 139 (19) | 19.0 |
| Laboratory supported probable | 4 (1) | 0.5 |
| Unclassified | 91 (13) | 12.4 |
| Suspected | 95 (13) | 13.0 |
| Total | 712 (100) | 93.7 |
Unclassified = probable or definite multiple sclerosis verified by a consultant neurologist but not classified according to the Poser criteria.