Table 3.
Regression of Cognitive Scores and Demographic Variables
| Variable | Global Cognition | Perceptual Orientation | Perceptual Speed | Semantic Memory | Working Memory | Episodic Memory |
|---|---|---|---|---|---|---|
| White vs AA | ||||||
| Estimate (SE) | 0.248 (0.034) | 0.487 (0.036) | 0.294 (0.043) | 0.317 (0.043) | 0.227 (0.036) | 0.18 (0.041) |
| p Value | <.0001 | <.0001 | <.0001 | <.0001 | <.0001 | <.0001 |
| Gender (M/F) | ||||||
| Estimate (SE) | −0.213 (0.035) | 0.144 (0.038) | −0.300 (0.045) | −0.167 (0.045) | −0.105 (0.038) | −0.377 (0.043) |
| p Value | <.0001 | .0002 | <.0001 | .0002 | .005 | <.0001 |
| Education | ||||||
| Estimate (SE) | 0.041 (0.005) | 0.051 (0.005) | 0.059 (0.006) | 0.043 (0.006) | 0.052 (0.005) | 0.03 (0.006) |
| p Value | <.0001 | <.0001 | <.0001 | <.0001 | <.0001 | <.0001 |
| Age | ||||||
| Estimate (SE) | −0.047 (0.007) | −0.026 (0.002) | −0.057 (0.003) | −0.049 (0.003) | −0.022 (0.002) | −0.046 (0.003) |
| p Value | <.0001 | <.0001 | <.0001 | <.0001 | <.0001 | <.0001 |
| Baseline income | ||||||
| Estimate (SE) | 0.048 (0.006) | 0.048 (0.007) | 0.055 (0.008) | 0.056 (0.008) | 0.036 (0.007) | 0.044 (0.008) |
| p Value | <.0001 | <.0001 | <.0001 | <.0001 | <.0001 | <.0001 |
| PD (Y/N) | ||||||
| Estimate (SE) | −0.869 (0.182) | −0.472 (0.197) | −0.472 (0.197) | −1.26 (0.217) | −1.185 (0.185) | −0.848 (0.221) |
| p Value | <.0001 | .017 | .017 | <.0001 | <.0001 | .0001 |
| R2 | 0.21 | 0.19 | 0.23 | 0.18 | 0.12 | 0.17 |
Notes: AA = African American; PD = Parkinson’s disease; SE = standard error.