Table 7 Differences between patients according to duration of use

Tests used

1-5 Years

mean ± SD

6-10 Years

mean ± SD

11-15 Years

mean ± SD

>15 Years

mean ± SD

F value

P value

CTMT Time 1 ^b

70.68 ± 32.55

71.92 ± 25.81

75.60 ± 19.73

85.39 ± 22.61

F(3,101) = 2.74

0.05

CTMT Color errors 1 ^b

1.11 ± 1.41

0.45 ± 0.96

0.31 ± 0.86

0.84 ± 1.19

F(4,45) = 3.75

0.01

CTMT Time 2 ^b

115.63 ± 34.03

119.04 ± 29.24

122.49 ± 31.82

133.15 ± 40.95

F(3,80) = 2.83

0.04

Stroop time 4 ^b

25.38 ± 6.36

26.06 ± 6.61

28.87 ± 8.66

29.31 ± 8.28

F(3,101) = 2.68

0.05

Stroop Errors 4 ^b

2.76 ± 2.37

2.50 ± 2.00

3.29 ± 1.78

3.73 ± 2.46

F(3,50) = 2.80

0.05

Stroop Time 5 ^b

29.04 ± 7.77

29.71 ± 7.88

31.93 ± 10.15

34.35 ± 10.41

F(7,80) = 2.87

0.01

5 dots total score ^a

29.51 ± 7.98

28.45 ± 7.89

26.47 ± 2.94

24.64 ± 7.96

F(7,100) = 2.81

0.01

5 dots unique designs ^a

26.16 ± 7.99

25.28 ± 7.81

22.57 ± 8.76

21.93 ± 6.94

F(3,101) = 2.70

0.05

SDMT ^a

28.95 ± 11.16

31.85 ± 9.65

30.88 ± 10.58

25.49 ± 10.55

F(4,35) = 3.01

0.032

Benton Rotation errors ^b

0.32 ± 0.53

0.63 ± 0.87

1.22 ± 1.41

0.87 ± 1.24

F(2,81) = 4.452

0.01