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Table 3 Mean learning and memory performance (raw scores) on the Verbal Paired Associate Test and the California Verbal Learning Test (CVLT) in APOE ε4 carriers and non-carriers (SDs shown in parantheses)

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 ε 4 carriers t-values/ U-values p-values Effect sizesa
  (n = 31) (n = 39)    
*Verbal Paired Associate Test – learning (errors) 33 (22.7) 41 (22.2) -1.51c 0.14 0.52
*Verbal Paired Associate Test – recall (errors) 7 (4.2) 9 (4.8) -1.80c 0.08 0.63
CVLT      
List A Trial 1 recall 5.8 (2.6) 4.6 (2.2) 2.14b 0.04 0.51
List A Trial 5 recall 10.1 (3.8) 8.5 (3.3) 1.85b 0.07 0.46
*Total learning (trial 1–trial 5) 42 (15) 34.7 (11) 2.34b 0.02 0.57
*Short delay free recall 7.3 (4.3) 6.1 (3.9) 1.20b 0.24 0.30
Short delay cued recall 9.3 (3.8) 8.1 (3.4) 1.35b 0.18 0.34
*Long delay free recall 8.5 (4.3) 6.8 (3.9) 1.78b 0.08 0.44
Long delay cued recall 9.1 (3.5) 8.1 (3.5) 1.18b 0.24 0.29
Percent recognition discriminability 89 (10.1) 84 (11.4) 1.84b 0.07 0.47
Intrusions learning 0.3 (0.7) 0.8 (1.4) 467c 0.03 -0.25
Short delay intrusions 0.2 (0.5) 0.3 (0.6) 559.7c 0.45 -0.09
Long delay intrusions 0.4 (0.6) 0.7 (1.5) 545c 0.39 -0.10
Recognitions hits 14.3 (1.8) 13.9 (1.9) 521.5c 0.32 -0.12
Recognition false alarms 3.0 (4.3) 4.7 (4.2) 413.5c 0.02 -0.27
Response bias (recognition) 0.09 (0.4) 0.24 (0.4) 462c 0.09 -0.20
Percentage consistency 75.7 (17.1) 67.6 (15.9) 395c 0.01 -0.30
  1. Degrees of freedom for all parametric tests was 68
  2. * According to Bonferoni correction, a p-value of 0.01 was regarded as significant for these scores
  3. a For t-tests, Cohen's d, for nonparametric tests r were calculated
  4. b Test statistics according to independent t-tests
  5. c Test statistics according to Mann-Whitney U tests