Table 5.
Summary of logistic regression analysis predicting memory performance
| Model terms | B | SE | Wald | P-value | −2LL | Nagelkerke’s R2 | Percentage correct |
|---|---|---|---|---|---|---|---|
| Intercept | 0.0 | 0.3 | 0.00 | 1.00 | 55.452 | 50.0 | |
| Step 1: PIB-PET positive | −2.833 | 0.812 | 12.184 | <0.001 | 39.802 | 0.432 | 80.0 |
| Step 2: PIB-PET positive | −2.659 | 1.038 | 6.567 | 0.01 | 25.000 | 0.711 | 87.5 |
| Left hippocampal volume | −0.003 | 0.001 | 6.747 | 0.01 |
Notes: The dependent variable in this analysis was memory performance measured by long-delay recall on RAVLT coded so that 0= >3 (good performance) and 1= ≤3 (poor performance). The independent variables of interest were the result of PIB-PET scan, APOE ε4 carrier, and left hippocampal volume. The models were estimated using the stepwise forward LR method.
Abbreviations: PIB-PET, 11C-Pittsburgh compound-B; RAVLT, Auditory Verbal Learning Test (Total, delayed recall, recognition score); LR, likelihood ratio.