Methodology of an International Study of People with Multiple Sclerosis Recruited through Web 2.0 Platforms: Demographics, Lifestyle, and Disease Characteristics

Table 9

Comparison of data with NARCOMS and MSBase registries.

	HOLISM	NARCOMS [22]	MSBase [45]
Female (%)	82.2	74.9	71.5
Age at diagnosis (years)	37.0 (median)	36.9 (mean)	32.2 (mean)
Age at symptom onset (years)	31.0 (median)	32.4 (mean)	Data not provided
Age at enrolment (years)	46.0 (median)	42.8 (mean)	42.7 (mean)
Disease duration at enrolment (years)	6.0 (median)	Data not provided	10.4 (mean)