Table 2. Demographics of the control populations.

	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.