Table 2 Comparison of the results of the D2 attention test between patients with stenosis ≤ 90% and patients with stenosis > 90% (Mann-Whitney U test).

From: Carotid revascularization improves cognition in patients with carotid stenosis

Variable

Stenosis ≤ 90% (n = 29)

Stenosis > 90% (n = 21)

Z

p

median

Q1-Q3

median

Q1-Q3

WZ

348

318

400

388

297

424

1,071

0,284

B

30

11

44

43

22

65

2,173

0,030*

%B

9

4

12

10

8

19

1,749

0,080

WZ-B

325

288

354

337

264

374

0,305

0,761

ZK

112

92

139

110

81

129

−0,551

0,582

GP

14

10

21

16

10

22

0,414

0,679

B1-4

9

4

12

10

4

18

1,075

0,282

B5-10

9

5

20

19

14

29

2,459

0,014*

B11-14

8

4

12

13

5

21

1,861

0,063

B1

25

10

39

40

19

54

2,232

0,026*

B2

1

0

5

3

2

6

1,918

0,055

  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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