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Table 2 Descriptive Statistics for Age, Educational Level, Gender, Memory Item Score, Digit Span Forward, Digit Span Backward, and the Trail Making Test Parts A and memory item

From: Normative scores for a brief neuropsychological battery for the detection of HIV-associated neurocognitive disorder (HAND) among South Africans

  Statistics        
Age Group 18-29 (n = 68) Mean (S.D) Median Minimum - Maximum Skewness Kurtosis 1 SD from mean 2 SD from
mean
Female          
   Age 23.29 (2.88) 23 18 - 29     
   memory 3.77 0.47 4 2 4 -2.33 8.09 3 3
   DSF 6.50 1.38 6 4 9 0.17 2.30 5 4
   DSB 3.63 0.97 3 2 7 1.01 4.18 3 2
   TMT-A 40.73 17.41 35 17 93 1.36 4.25 58 76
   TMT-B 72.57 25.97 35.5 37 220 3.13 18.29 99 125
Male          
   Age 22.62 (2.82) 22 19 - 29     
   memory 3.39 0.55 3.5 2.5 4 -0.16 1.75 3 2
   DSF 6.33 1.12 6 4 8 0.70 3.42 5 4
   DSB 4.56 0.73 5 3 5 -1.24 3.17 4 3
   TMT-A 35.89 8.94 35 21 55 0.67 4.05 45 54
   TMT-B 87.78 26.51 77 61 135 0.69 2.11 115 141
Age Group 30-50 (n = 42)          
Female          
   Age 38.39 (5.15) 39 30 - 50     
   memory 3.66 0.48 4 2 4 -1.46 5.03 3 3
   DSF 6.14 1.40 6 4 9 0.40 2.21 5 3
   DSB 3.29 0.83 3 2 6 1.35 5.32 3 2
   TMT-A 48.54 18.70 50 18 90 0.33 2.38 67 86
   TMT-B 89.26 28.42 85 53 180 1.10 4.23 118 146
Male          
   Age 36 (5.1) 35 29 - 43     
   memory 3.19 0.96 3.5 1.5 4 -0.83 2.18 2 1
   DSF 6.00 1.07 6 5 8 0.75 2.50 5 4
   DSB 3.88 0.99 4 3 6 1.19 3.75 3 2
   TMT-A 50.00 13.63 53 28 65 -0.43 1.76 64 77
   TMT-B 114.25 43.10 103 67 185 0.49 1.83 157 201
  1. Memory Item: the number of words correctly recalled out of four words.
  2. DSF and DSB: the number of items repeated in the correct sequence.
  3. TMT Part A and TMT Part B: the number of seconds taken to complete test.