Table 1.

Demographic and clinical data for relapsing-remitting multiple sclerosis patients and healthy individuals (all Russians).

	RRMS, n = 565	Healthy individuals, n = 471
Sex ratio (female/male)	2.3:1 (395/170)	1.9:1 (310/161)
Age (years), mean ± SD	38.8 ± 10.6	44.2 ± 16.4
Individuals with familial history of MS (%)	27 (4.8%)	0
Age at onset (years), mean ± SD	27.4 ± 9.2	–
Disease duration (years), mean ± SD	11.4 ± 7.4	–
EDSS, mean ± SD	2.8 ± 1.2	–
MSSS, mean ± SD	3.4 ± 1.9	–

EDSS, Expanded Disability Status Scale; MSSS, Multiple Sclerosis Severity Score; SD, Standard Deviation; RRMS, Relapsing-Remitting Multiple Sclerosis.