Table 1 Patient background and clinical course in MS and NMOSD.

From: Progressive patterns of neurological disability in multiple sclerosis and neuromyelitis optica spectrum disorders

 

MS (n = 62)

NMOSD (n = 33)

p-value

Male:Female

12:50

3:30

0.25

Onset age (mean ± SD)

29.9 ± 8.6

48.5 ± 13.8

< 0.0001

Total EDSS follow-up period (person-year)

337

229

EDSS follow-up years per capita (median, IQR)

6 (3–7)

7 (5–9)

0.0460

Cross-sectional EDSS

EDSS at 5 years from onset (median, IQR)

1.5 (1.0–2.0; n = 53)

3.0 (2.0–5.0; n = 31)

< 0.0001

EDSS at 10 years from onset (median, IQR)

1.5 (1.0–2.0; n = 20)

4.5 (3.0–6.5; n = 18)

0.0002

EDSS annual deterioration (person-year)

Total

28/337 (8.3%)

20/229 (8.7%)

0.86

(With relapse)

11 (3.3%)

13 (5.7%)

0.16

(Without relapse)

17 (5.0%)

7 (3.1%)

0.29

EDSS annual improvement (person-year)

Total

32/337 (9.5%)

4/229 (1.7%)

0.0001

(With relapses)

5 (1.5%)

2 (0.9%)

0.71

(Without relapses)

27 (8.0%)

2 (0.9%)

< 0.0001

EDSS annually unchanged (person-year)

Total

277/337 (82.2%)

205/229 (89.5%)

0.0161

(With relapses)

22 (6.5%)

8 (3.5%)

0.13

(Without relapses)

255 (75.7%)

197 (86.0%)

0.0026

  1. All EDSS scores were evaluated in the chronic phase more than 3 months after the last clinical episodes; the scores within 3 months from the last episodes were not used in this study.
  2. EDSS Expanded Disability Status Scale, IQR interquartile range (25–75 percentile), MS multiple sclerosis, NMOSD neuromyelitis optica spectrum disorders, SD standard deviation.