| Group HM-C (n = 60) | Group HA-C (n = 82) | Group HAV-C (n = 48) | Group OND (n = 45) | |
| Age median (25th to 75th percentile) | 37 (28 to 49) | 58 (51 to 72) | 55 (32 to 70) | 60 (51 to 77) |
| Sex %M M/F | 46% 28/32 | 40% 29/43 | 56% 27/21 | 56% 25/20 |
HA-C, healthy aged controls; HAV-C, older controls not affected by neurological diseases but scheduled for venography; HM-C, healthy controls matched for age and gender with multiple sclerosis patients; OND, controls affected by other neurological diseases.