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Table 7 Transformation of VLT-D subtest scores

From: The screen for cognitive impairment in psychiatry: diagnostic-specific standardization in psychiatric ill patients

< Secondary school

≥ Secondary school

18-39

40-55

18-39

40-55

PD

P

z

T

IQ

PD

P

z

T

IQ

PD

P

z

T

IQ

PD

P

z

T

IQ

0

2

−2.42

26

64

0

4

−1.94

31

71

0

1

−2.66

23

60

0

4

−1.94

31

71

1

4

−1.97

30

70

1

9

−1.50

35

77

1

1

−2.21

28

67

1

9

−1.5

35

77

2

7

−1.52

35

77

2

15

−1.07

39

84

2

4

−1.76

32

74

2

15

−1.07

39

84

3

14

−1.08

39

84

3

24

−0.63

44

91

3

10

−1.32

37

80

3

24

−0.63

44

91

4

24

−0.63

44

91

4

40

−0.20

48

97

4

20

−0.87

41

87

4

40

−0.2

48

97

5

41

−0.18

48

97

5

61

0.24

52

104

5

35

−0.42

46

94

5

61

0.24

52

104

6

62

0.26

53

104

6

76

0.68

57

110

6

50

0.02

50

100

6

76

0.68

57

110

7

77

0.71

57

111

7

85

1.11

61

117

7

66

0.47

55

107

7

85

1.11

61

117

8

88

1.16

62

117

8

93

1.55

65

123

8

80

0.92

59

114

8

93

1.55

65

123

9

94

1.60

66

124

9

97

1.98

70

130

9

90

1.36

64

120

9

97

1.98

70

130

10

98

2.05

71

131

10

99

2.42

74

136

10

97

1.81

68

127

10

99

2.42

74

136

N

64

N

109

N

204

N

136

Mean

5.41

Mean

4.45

Mean

5.95

Mean

5.34

SD

2.238

SD

2.295

SD

2.238

SD

2.401

Median

5

Median

4

Median

6

Median

6

Skewness

−0.153

Skewness

−0.025

Skewness

−0.156

Skewness

−0.410

Kurtosis

0.129

Kurtosis

−0.232

Kurtosis

−0.473

Kurtosis

−0.095

Range

0-10

Range

0-10

Range

0-10

Range

0-10