Multiple Sclerosis Patients with Markedly Low Intrathecal Antibody Response in Sri Lanka

Table 1

Demographic characteristics.

Clinical characteristics	MS; (%)
Total	69
Male : female ratio	1 : 1.7
Mean age (range) years	34 (16–58)
Mean age at onset (range) years	32 (16–57)
Mean disease duration (range) years	3 (1–18)
Clinical subtypes (%)
RRMS	37 (54)
SPMS	4 (6)
PPMS	1 (1)
CIS	27 (39)
Attack frequency (per year ± SD)	1.2 ± 0.5
Mean EDSS (range)	2.5 (0–8)
Upgraded Global MSSS	5.7 ± 2.6
Global ARMSSS	5.3 ± 2.9
History of travel to high MS prevalent country	2 (3)
Family history of MS	0

MS: multiple sclerosis; RRMS: relapsing remitting multiple sclerosis; SPMS: secondary progressive multiple sclerosis; PPMS: primary progressive multiple sclerosis; CIS: clinically isolated syndrome; SD: standard deviation; EDSS: Kurtzke expanded disability status scale; MSSS: multiple sclerosis severity score; ARMSSS: age related multiple sclerosis severity score.