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Table 3 Comparison between patients in different disability groups according to EDSS

From: Correlation between functional MRI techniques and early disability in ambulatory patients with relapsing–remitting MS

 

No disability

N = 28

Minimal disability

N = 32

Moderate disability

N = 20

P value

Age (year) mean ± SD

35.7 ± 10.1

30.7 ± 6.6

33.6 ± 8.6

0.081

Sex

   

0.011

 Male

12 (42.9%)

20 (62.5%)

4 (20.0%)

 

 Female

16 (57.1%)

12 (37.5%)

16 (80.0%)

 

Duration (years)

1.6 ± 2.2

6.2 ± 5.1

6.3 ± 4.5

 < 0.001

Number of attacks/years

2 ± 0.5

3 ± 1.2

3.4 ± 0.5

 < 0.001

Disease modifying therapy

   

0.000

 No

24 (85.7%)

12 (37.5%)

16 (80.0%)

 

 Yes

4 (14.3%)

20(62.5%)

4 (20.0%)

 

Symptomatic treatment

   

0.000

 No

(57.1%)

4 (12.5%)

0 (0.0%)

 

 Yes

12 (42.9%)

28 (87.5%)

20 (100.0%)

 

Conventional MRI (cMRI)

    

 Number of plaques on T2 weighted images

4 ± 1.3

7 ± 3.9

6.4 ± 3.5

0.001

 Black holes

2.8 ± 1.2

4 ± 2.1

2.4 ± 3.4

0.037

 Enhanced plaques

12(42.9%)

0(0.0%)

12(60.0%)

 < 0.001

Non-conventional MRI

    

 ADC

1.12 ± 0.19

1.50 ± 0.35

1.51 ± 0.36

 < 0.001

 NAA/Cr NAWM

1.67 ± 0.03

1.6 ± 0.45

1.49 ± .033

0.297

 NAA/Cr plaque

1.34 ± 0.44

1.59 ± 0.51

1.11 ± 0.15

0.001

 Cho/NAA_NAWM

0.65 ± 0.07

0.69 ± .082

0.67 ± 0.08

0.094

 Cho/NAA plaque

0.72 ± 0.08

0.71 ± 0.10

0.74 ± 0.06

0.580

 Cho/Cr NAWM

1.05 ± 0.48

0.98 ± 0.16

0.98 ± 0.13

0.636

 Cho/Cr plaque

1.15 ± 0.42

1.03 ± 0.21

1.07 ± 0.21

0.296

  1. Cho/Cr choline/creatine; Cho/NAA choline/N-acetyl-aspartate; NAA/Cr N-acetyl-aspartate/creatine; EDSS expanded disability status scale; NAWM normal appearing white matter