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Table 2 Mean performance (SDs shown in parantheses) of APOE ε4 carriers and non-carriers on cognitive measures (raw scores)

From: APOE status and its association to learning and memory performance in middle aged and older Norwegians seeking assessment for memory deficits

  ε 4 non-carriers (n = 31) ε 4 carriers (n = 39) t-values/U-values p-values Effect sizesa
MMSE 28.4 (1.6) 27.5 (1.8) 2.19c 0.03 0.53
WASI-IQ 105 (13.4)b 106 (15.3)b 0.068c,e 0.95 0.01
Stroop Color Word Test (seconds) 94 (54.3) 106 (58.0) -0.840c 0.40 0.22
WAIS-R Digit Symbol (items) 35 (10.5) 32 (12.1) 1.166c 0.25 0.27
FAS (items) 30 (12.0) 31 (12.8) -0.262c 0.79 0.08
Animal fluency (items) 16 (5.8) 17 (5.6) -0.299c 0.77 0.18
Trail Making A (seconds) 48 (22.0) 58 (26.9) 477d 0.13 -0.18
Trail Making B (seconds) 144 (112.6) 165 (89.4) 479.5d 0.14 -0.18
Boston Naming (items) 15 (1.1) 14 (1.1) 539.5d 0.03 -0.26
Rey Complex Figure Test – copy (points) 33 (5.4) 31 (7.0) 487d 0.16 -0.17
Rey Complex Figure Test – recall (points) 16 (9.0) 11 (7.5) 410.5d 0.02 -0.27
  1. Degrees of freedom for all parametric tests was 68
  2. a For t-tests, Cohen's d, for nonparametric tests r were calculated
  3. b Standardized scores
  4. c Test statistics according to independent t-tests
  5. d Test statistics according to Mann-Whitney U tests
  6. e Test statistic based on age-adjusted scores