Lifetime exposure to smoking and substance abuse may be associated with late-onset multiple sclerosis: a population-based case-control study

Table 4 Clinical characteristics of LOMS cases and general population controls

MS type	Frequency N (%)
Progressive forms Relapsing forms	53 (63.8%) 30 (36.14%)
	Mean (years)
Age at MS diagnosis	55.2 ± 4.39
Age at first symptoms	53.5 ± 4.09
EDSS	1.68 2.1

ISSN: 1471-2377