The effect of ε4 allele possession on outcome (EDSS 0–5.5 v 6–10 at ⩾5 years, and “severity score” <median v “severity score” >median value) (percentages)
| EDSS 0–5.5 ⩾5 years disease duration | EDSS 6–10 ⩾5 years disease duration | Total number of patients | “Severity score” <median value “Mild” disease | “Severity score” >median value “Aggressive” disease | Total number of patients | |
| ε4 Allele positive | 6 (54.6) | 5 (45.4) | 11 (100) | 7 (46.7) | 8 (53.3) | 15 (100) |
| ε4 Allele negative | 11 (47.8) | 12 (52.2) | 23 (100) | 18 (51.4) | 17 (48.6) | 35 (100) |