Table 4 Comparison of the results of the D2 attention test in patients with carotid artery stenosis taking into consideration the stenosed vessel (right/left) (Mann-Whitney U test).

From: Carotid revascularization improves cognition in patients with carotid stenosis

Variable

Right stenosed vessel

Left stenosed vessel

Z

p

Median

Q1-Q3

Median

Q1-Q3

WZ

368

318

414

353

307

395

−0,385

0,700

B

37

14

50

30

18

53

0,021

0,983

%B

10

5

15

9

6

13

0,010

0,992

WZ-B

328

268

372

313

267

368

−0,489

0,625

ZK

118

84

134

110

79

137

−0,375

0,708

GP

14

10

20

16

11

23

0,824

0,410

B1-4

9

4

13

11

4

14

0,136

0,892

B5-10

18

6

22

14

9

22

−0,031

0,975

B11-14

10

4

16

10

5

17

0,406

0,685

B1

30

12

42

27

16

51

0,572

0,567

B2

3

1

7

2

0

4

−1,765

0,078

  1. *Statistically significant, WZ - working speed, B - sum of all errors, %B - the percentage of errors, WZ-B - general perceptual ability, ZK - ability to concentrate, GP – indicator of the subject’s constant or changing way of working, B1-4 - errors from the first part of the tasks (lines 1–4), B5-10- errors from the middle part of the tasks (lines 5–10), B11-14 - errors from the last part of the tasks (lines 11–14), B1 - errors of omission, B2 - number of incorrectly crossed out letters.
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