Table 1. Demographic and clinical characteristics of the groups with negative and positive history of optic neuritis (ON).

	ON negative history group	ON positive history group
N#	22	28
Age	43.9 (9.7)	37.1 (9.9)
Sex	14 F (64%)	18 F (64%)
Disease duration (years)	3.5 (0.7 to 14.2)	2.9 (0.45 to 30.4)
Time from ON (years)	/	3.0 (0.2 to 15.8)
EDSS	2.0 ± (0 to 5.5)	2.0 (0 to 4)
LCLA	22.9 (10.1)	23.1 (9.2)
VEP	125.7 (8.6)	129.0 (11.4)

Demographic data, LCLA abd VEP are reported as mean (SD) or n (%). Disease duration, time from ON and EDSS are reported at median (range).