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Table 2 An example where performance falls in normal or impaired range depending on demographic adjustment/model used

From: A web-based normative calculator for the uniform data set (UDS) neuropsychological test battery

Sex
(M = 1; F = 2)
1           
Age 60 Sex, age, & education Sex only Age only Education only No adjustment
Education 20           
   Z Score Percentile Z Score Percentile Z Score Percentile Z Score Percentile Z Score Percentile
MMSE 27 -2.087 1.84 -1.306 9.59 -1.758 3.94 -2.052 2.01 -1.538 6.20
Logical Memory A: Immediate 7 -2.162 1.53 -1.614 5.33 -1.887 2.96 -1.033 15.09 -1.769 3.84
Logical Memory A: Delayed 4 -2.404 0.81 -1.826 3.39 -2.116 1.72 -2.481 0.65 -2.000 2.28
Length of Delay
(25-35 min)
25           
Digit Span Forward 6 -1.860 3.14 -1.333 9.12 -1.432 7.61 -1.706 4.40 -1.238 10.78
Digit Span Forward: Length 5 -2.089 1.84 -1.642 5.03 -1.701 4.44 -1.966 2.46 -1.545 6.11
Digit Span Backward 4 -1.910 2.81 -1.308 9.54 -1.511 6.54 -1.834 3.33 -1.318 9.37
Digit Span Backward: Length 3 -2.160 1.54 -1.576 5.75 -1.772 3.82 -2.072 1.91 -1.667 4.78
Category Fluency: Animals 9 -2.928 0.17 -1.989 2.33 -2.357 0.92 -2.565 0.52 -1.964 2.47
Category Fluency: Vegetables 7 -2.051 2.01 -1.391 8.20 -2.119 1.71 -2.031 2.11 -1.750 4.01
Trails A 29 -0.461 32.25 0.349 63.66 -0.131 44.78 0.017 50.67 0.364 64.19
Trails B 84 -0.887 18.76 0.065 52.60 -0.360 35.93 -0.380 35.21 0.126 55.01
WAIS-Digit Symbol 52 -0.484 31.43 0.559 71.19 -0.231 40.88 -0.057 47.74 0.400 65.54
Boston Naming Test (30 odd) 25 -1.590 5.59 -0.843 19.96 -0.916 17.99 -1.251 10.54 -0.688 24.59
  1. MMSE, Mini-Mental State Examination; WAIS, Wechsler Adult Intelligence Scale.
  2. Severely impaired = < 1%, Moderately impaired = 1% to 1.99%, Mildly impaired = 2% to 8.99%, Low average = 9% to 24.99%, Average = 25% to 74.99%, High average = 75% to 90.99, Superior = 91% to 97.99%, Very superior = 98%<