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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