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Table 6 Transformation of VFT 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
0-4 1 < −1.79 < 32 < 73 0-1 1 < −1.79 < 32 < 73 0-6 1 < −1.74 < 33 < 74 0-3 1 < −2.22 < 28 < 67
0-4 1 < −1.79 < 32 < 73 2 1 −1.79 32 73 0-6 1 < −1.74 < 33 < 74 0-3 1 < −2.22 < 28 < 67
0-4 1 < −1.79 < 32 < 73 3 2 −1.63 34 76 0-6 1 < −1.74 < 33 < 74 0-3 1 < −2.22 < 28 < 67
0-4 1 < −1.79 < 32 < 73 4 5 −1.46 35 78 0-6 1 < −1.74 < 33 < 74 4 1 −2.22 28 67
5 1 −1.79 32 73 5 7 −1.30 37 80 0-6 1 < −1.74 < 33 < 74 5 1 −2.04 30 69
6 2 −1.6 34 76 6 10 −1.14 39 83 0-6 1 < −1.74 < 33 < 74 6 1 −1.86 31 72
7 5 −1.42 36 79 7 16 −0.98 40 85 7 1 −1.74 33 74 7 2 −1.68 33 75
8 11 −1.23 38 82 8 22 −0.81 42 88 8 1 −1.55 34 77 8 5 −1.51 35 77
9 16 −1.05 40 84 9 29 −0.65 43 90 9 4 −1.37 36 79 9 7 −1.33 37 80
10 20 −0.86 41 87 10 35 −0.49 45 93 10 9 −1.18 38 82 10 9 −1.15 38 83
11 24 −0.68 43 90 11 40 −0.33 47 95 11 17 −1.00 40 85 11 13 −0.97 40 85
12 30 −0.49 45 93 12 44 −0.16 48 98 12 23 −0.81 42 88 12 19 −0.8 42 88
13 38 −0.31 47 95 13 51 0.00 50 100 13 29 −0.63 44 91 13 25 −0.62 44 91
14 48 −0.12 49 98 14 61 0.16 52 102 14 37 −0.44 46 93 14 33 −0.44 46 93
15 58 0.06 51 101 15 67 0.33 53 105 15 46 −0.26 47 96 15 42 −0.26 47 96
16 66 0.25 52 104 16 72 0.49 55 107 16 54 −0.07 49 99 16 50 −0.09 49 99
17 73 0.43 54 106 17 79 0.65 57 110 17 62 0.11 51 102 17 56 0.09 51 101
18 79 0.62 56 109 18 83 0.81 58 112 18 68 0.30 53 104 18 64 0.27 53 104
19 83 0.8 58 112 19 87 0.98 60 115 19 72 0.48 55 107 19 72 0.45 54 107
20 84 0.99 60 115 20 89 1.14 61 117 20 76 0.67 57 110 20 78 0.62 56 109
21 87 1.17 62 118 21 90 1.30 63 120 21 80 0.85 59 113 21 84 0.80 58 112
22 89 1.35 64 120 22 92 1.46 65 122 22 84 1.04 60 116 22 88 0.98 60 115
23 92 1.54 65 123 23 94 1.63 66 124 23 87 1.22 62 118 23 90 1.16 62 117
24 95 1.72 67 126 24 95 1.79 68 127 24 89 1.41 64 121 24 93 1.33 63 120
25 97 1.91 69 129 25 97 1.95 70 129 25 92 1.59 66 124 25 95 1.51 65 123
26 98 2.09 71 131 26 97 2.11 71 132 26 95 1.78 68 127 26 96 1.69 67 125
27 98 2.28 73 134 27 97 2.28 73 134 27 96 1.96 70 129 27 96 1.87 69 128
28 98 2.46 75 137 28 98 2.44 74 137 28 97 2.15 71 132 28 97 2.04 70 131
29 98 2.65 76 140 29 98 2.60 76 139 29 98 2.33 73 135 29 98 2.22 72 133
30 98 2.83 78 143 30 99 2.76 78 141 30 98 2.52 75 138 30 99 2.40 74 136
31 98 3.02 80 145 31 99 2.93 79 144 31 98 2.71 77 141 31 99 2.58 76 139
32 98 3.20 82 148 32 99 3.09 81 146 32 99 2.89 79 143 32 99 2.75 78 141
33 98 3.39 84 151 33 99 3.25 83 149 33 99 3.08 81 146 33 99 2.93 79 144
34 99 3.57 86 154 34 99 3.42 84 151 34 99 3.26 83 149 34 99 3.11 81 147
> 34 99 > 3.57 > 86 > 154 35 99 3.58 86 154 > 34 99 > 3.26 > 83 > 149 35 99 3.29 83 149
> 34 99 > 3.57 > 86 > 154 36 99 3.74 87 156 > 34 99 > 3.26 > 83 > 149 36 99 3.46 85 152
> 34 99 > 3.57 > 86 > 154 37 99 3.90 89 159 > 34 99 > 3.26 > 83 > 149 37 99 3.64 86 155
> 34 99 > 3.57 > 86 > 154 38 99 4.07 91 161 > 34 99 > 3.26 > 83 > 149 38 99 3.82 88 157
> 34 99 > 3.57 > 86 > 154 > 38 99 > 4.07 > 91 > 161 > 34 99 > 3.26 > 83 > 149 > 38 99 > 3.82 > 88 > 157
N 64 N 109 N 204 N 136
Mean 14.67 Mean 13.00 Mean 16.39 Mean 16.49
SD 5.410 SD 6.149 SD 5.401 SD 5.633
Median 14 Median 13 Median 15 Median 16
Skewness 0.828 Skewness 0.921 Skewness 0.785 Skewness 1.371
Kurtosis 1.488 Kurtosis 1.849 Kurtosis 0.374 Kurtosis 6.377
Range 5-34 Range 2-38 Range 7-34 Range 4-48