Table 3.
Regression equations for predicting one year learning and memory scores
| Cognitive scores | F(df) | R2 | SEesta | Cb | Variables in equationc |
|---|---|---|---|---|---|
| Same test | |||||
| HVLT-R Total | 89.12 (1,125) | 0.42*** | 4.69 | 7.56 | + (baseline HVLT-R Total *0.72) |
| HVLT-R DR | 59.08 (2,123) | 0.49*** | 2.57 | 11.26 | + (baseline HVLT-R DR *0.59) - (age*0.10) |
| List Learning | 51.59 (2,124) | 0.45*** | 4.45 | 29.98 | + (baseline List Learning*0.52) - (age*0.22) |
| List Recall | 58.35 (2,124) | 0.49*** | 1.88 | 7.49 | + (baseline List Recall*0.67) - (age*0.07) |
| Story Memory | 31.68 (3,123) | 0.44*** | 3.23 | 20.47 | + (baseline Story Memory*0.48) - (age*0.14) − (MCI*1.69) |
| Story Recall | 37.74 (2,124) | 0.38*** | 2.08 | 8.56 | + (baseline Story Recall*0.61) - (age*0.07) |
| Different test | |||||
| HVLT-R Total | 29.11 (2,124) | 0.32*** | 5.09 | 15.13 | + (baseline List Learning*0.42) − (MCI*3.13) |
| HVLT-R Total | 19.45 (3,123) | 0.32*** | 5.10 | 32.42 | + (baseline Story Memory*0.41) − (age*0.17) − (MCI*3.64) |
| HVLT-R DR | 30.14 (3,122) | 0.43*** | 2.73 | 15.78 | + (baseline List Recall*0.54) − (age*0.13) − (MCI*1.33) |
| HVLT-R DR | 26.34 (3,122) | 0.39*** | 2.81 | 14.82 | + (baseline Story Recall*0.42) − (age*0.13) − (MCI*1.88) |
| List Learning | 55.11 (2,124) | 0.47*** | 4.38 | 29.33 | + (baseline HVLT-R Total*0.55) − (age*0.21) |
| List Learning | 38.95 (2,124) | 0.39*** | 4.72 | 46.08 | + (baseline Story Memory*0.49) − (age*0.36) |
| List Recall | 51.45 (2,124) | 0.45*** | 1.94 | 5.93 | + (baseline HVLT-R DR*0.45) − (age*0.05) |
| List Recall | 28.77 (3,123) | 0.41*** | 2.02 | 6.62 | + (baseline Story Recall*0.44) − (age*0.06) − (MCI*1.33) |
| Story Memory | 32.32 (2,124) | 0.34*** | 3.48 | 15.75 | + (baseline HVLT-R Total*0.36) − (age*0.10) |
| Story Memory | 18.93 (3,123) | 0.32*** | 3.56 | 20.70 | + (baseline List Learning*0.21) − (age*0.11) − (MCI*1.84) |
| Story Recall | 32.74 (2,124) | 0.35*** | 2.13 | 10.40 | + (baseline HVLT-R DR*0.38) − (age*0.05) |
| Story Recall | 16.17 (3,123) | 0.28*** | 2.24 | 13.74 | + (baseline List Recall*0.29) − (age*0.08) − (MCI*1.00) |
Note. HVLT-R = Hopkins Verbal Learning Test – Revised, DR = Delayed Recall. For the R2, the following key denotes the significance of the final step within the regression model:
***
p<0.001,
**
p<0.01,
*
p<0.05.
a
Standard error of the estimate,
b
Constant,
c
Unstandardized beta weights for other variables in the equation. Age is years old at baseline visit. MCI status is coded as 0 = intact, 1 = MCI. To calculate the Predicted One Year score, use the following formula: (Constant value for the cognitive variable) + (Other variables in equation as noted in the Table).