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Table 3 ECAS outcome scores of patients with SMA type 2 and 3 before and after treatment initiation

From: Cognitive performance of adult patients with SMA before and after treatment initiation with nusinersen

ECAS outcome scores

Median (Range)

V0 – SMA type 2/3

(n = 23)

V1 - SMA type 2/3

(n = 23)

V0 vs. V1

Language (max. 28)

27.0 (25–28)

28.0 (25–28)

Z = − 2.352; p= 0.019 1; r= 0.49

below cut-off, n (%)

2 (8.7)

1 (4.3)

p > 0.9992; OR = 0.48

Verbal Fluency (max. 24)

12.0 (8–22)

16.0 (10–24)

Z= − 2.199;p= 0.0281; r= 0.46

below cut-off, n (%)

7 (30.4)

3 (13.0)

p = 0.2842; OR = 0.34

Executive Functions (max. 48)

39.0 (28–44)

40.0 (32–46)

Z= − 2.469;p= 0.0141; r= 0.51

below cut-off, n (%)

4 (17.4)

1 (4.3)

p = 0.3462; OR = 0.22

Memory (max. 24)

16.0 (11–21)

18.0 (14–23)

Z= − 2.979;p= 0.0031; r= 0.62

below cut-off, n (%)

0 (0.0)

0 (0.0)

p > 0.9992

Visuospatial (max. 12)

12.0 (11–12)

12.0 (8–12)

Z = − 1.511; p = 0.1311; r = 0.81

below cut-off, n (%)

1 (4.3)

4 (17.4)

p = 0.3462; OR = 4.63

ALS-specific (max. 100)

78.0 (64–90)

82.0 (72–96)

Z= − 3.241;p= 0.0011; r= 0.68

below cut-off, n (%)

11 (47.8)

8 (34.8)

p = 0.5502; OR = 0.58

Non-ALS-specific (max. 36)

28.0 (23–32)

30.0 (24–35)

Z= − 2.754;p= 0.0061; r= 0.57

below cut-off, n (%)

0 (0.0)

0 (0.0)

p > 0.9992

ECAS total (max. 136)

106.0 (91–119)

113.0 (96–130)

Z= − 3.318;p< 0.0011; r= 0.69

below cut-off, n (%)

3 (13.0)

0 (0.0)

p = 0.2332; OR = 0.00

  1. ALS: amyotrophic lateral sclerosis; ECAS: Edinburgh Cognitive and Behavioral ALS Screen; n: number; SMA: spinal muscular atrophy; SD: standard deviation; OR: odds ratio; V0: Baseline visit before treatment initiation; V1: Follow-up visit 14 months after treatment initiation; 1calculated by Wilcoxon signed-rank test for absolute ECAS scores in V0 and V1; 2calculated by Fisher’s exact test (differences between the groups with regard to the proportion of ECAS scores below the cut-off indicating cognitive impairment in V0 and V1); p values < 0.05 considered statistically significant and are marked bold; Cohen’s effect sizes of r = 0.10, r = 0.30, and r = 0.50 as thresholds for small, medium and large effects respectively [15]