Table 2.
Demographic characteristics of the study participants
| Variable | N | M (SD) | rage | P |
|---|---|---|---|---|
| Age (years) | 165 | 70.15 (4.50) | ||
| Men [N (%)] | 165 | 81 (49%) | ||
| MMSE | 165 | 28.85 | ||
| Education years | 165 | 14.53 (3.46) | ||
| Diastolic blood pressure (mmHg) | 165 | 81.70 (9.85) | ||
| Cognition | ||||
| Processing speed | 161 | −0.28 | <0.001 | |
| Memory | 162 | −0.31 | <0.001 | |
| Executive functions | 154 | −0.26 | 0.001 | |
| Motor performance: | ||||
| Motor speed | 161 | −0.40 | <0.001 | |
| Grip force (kg) | 163 | −0.21 | 0.008 | |
| Cingulum measures | ||||
| Volume (ml) | 164 | 1992.48 (437.77) | −0.04 | 0.635 |
| FA | 164 | 4.7 × 10−1 (3.6 × 10−2) | −0.06 | 0.484 |
| MD (mm2/s) | 165 | 7.6 × 10−4 (3.0 × 10−5) | 0.32 | <0.001 |
| AD (mm2/s) | 164 | 1.2 × 10−3 (4.5 × 10−5) | 0.27 | 0.001 |
| RD (mm2/s) | 165 | 5.5 × 10−4 (3.9 × 10−5) | 0.22 | 0.005 |
| rs‐fMRI* | 165 | 7.7 × 10−1 (2.7 × 10−1) | −0.08 | 0.306 |
Abbreviations: AD, axial diffusivity; FA, fractional anisotropy; kg, kilogram; M, mean; MD, mean diffusivity; ml, milliliter; mmHg, millimeter of mercury; MMSE, mini‐mental state examination; RD, radial diffusivity; r age, Pearson's correlation with age; rs‐fMRI, resting‐state functional connectivity; s, seconds; SD, standard deviation.
Mean of rs‐fMRI represents the Pearson's correlation coefficient (z‐values).