Table 2 Assessment of cognitive functions among the studied population

Attention

 Digit span

6.0 ± 1.5

8.3 ± 2.8

 < 0.001^*

Working memory

 Digit span

6.0 ± 1.5

8.3 ± 2.8

 < 0.001^*

 Arithmetic

4.5 ± 1.9

7.3 ± 2.4

 < 0.001*

Language

 Vocabulary

18.1 ± 4.2

20.9 ± 7.6

0.018^*

 Similarities

8.5 ± 5.2

10.4 ± 5.0

0.063

 Verbal fluency test

12.1 ± 7.1

14.8 ± 7.3

0.054

Visuospatial orientation

 Block design

11.4 ± 8.7

16.9 ± 5.0

 < 0.001*

 Digit symbol

35.3 ± 6.9

39.9 ± 12.8

0.021*