Table 3.
Results of multiple linear regression models of associations of each cognitive domain with age and education. N=1260 individuals with complete data on all tests.
| Domain | Covariate | Coefficient | SE | t | P value | 95% CI for Coefficient | Adjusted R2 | |
|---|---|---|---|---|---|---|---|---|
| Attention | Age 75-84 | -0.3897 | 0.0431 | -9.03 | <0.001 | -0.4743 | -0.3051 | 13.3% |
| Age ≥85 | -0.6723 | 0.0625 | -10.75 | <0.001 | -0.7950 | -0.5497 | ||
| Education =HS | 0.2664 | 0.0674 | 3.95 | <0.001 | 0.1342 | 0.3985 | ||
| Education >HS | 0.3279 | 0.0686 | 4.78 | <0.001 | 0.1933 | 0.4624 | ||
| Executive | Age 75-84 | -0.3474 | 0.0384 | -9.05 | <0.001 | -0.4227 | -0.2721 | 19.4% |
| Age ≥85 | -0.7477 | 0.0556 | -13.44 | <0.001 | -0.8569 | -0.6386 | ||
| Education =HS | 0.2991 | 0.0599 | 4.99 | <0.001 | 0.1815 | 0.4167 | ||
| Education >HS | 0.4349 | 0.0610 | 7.13 | <0.001 | 0.3152 | 0.5546 | ||
| Language | Age 75-84 | -0.3325 | 0.0408 | -8.16 | <0.001 | -0.4125 | -0.2525 | 17.7% |
| Age ≥85 | -0.7141 | 0.0591 | -12.09 | <0.001 | -0.8300 | -0.5981 | ||
| Education =HS | 0.2768 | 0.0637 | 4.35 | <0.001 | 0.1519 | 0.4017 | ||
| Education >HS | 0.4766 | 0.0648 | 7.36 | <0.001 | 0.3495 | 0.6037 | ||
| Memory | Age 75-84 | -0.4267 | 0.0398 | -10.72 | <0.001 | -0.5048 | -0.3486 | 21.7% |
| Age ≥85 | -0.8429 | 0.0577 | -14.61 | <0.001 | -0.9561 | -0.7297 | ||
| Education =HS | 0.2088 | 0.0622 | 3.36 | 0.001 | 0.0868 | 0.3308 | ||
| Education >HS | 0.4015 | 0.0633 | 6.34 | <0.001 | 0.2774 | 0.5257 | ||
| Visuospatial | Age 75-84 | -0.3780 | 0.0571 | -6.62 | <0.001 | -0.4901 | -0.2659 | 13.0% |
| Age ≥85 | -0.7403 | 0.0828 | -8.94 | <0.001 | -0.9027 | -0.5778 | ||
| Education =HS | 0.3695 | 0.0892 | 4.14 | <0.001 | 0.1945 | 0.5446 | ||
| Education >HS | 0.6615 | 0.0908 | 7.28 | <0.001 | 0.4834 | 0.8397 | ||
1
Reference group for age: 65-74 years.
2
Reference group for education: less than high school.