Table 1.
Mean ± SD or n (%) | Range | Correlations with lap time variation, r (p) or MD±SE (p) | |
---|---|---|---|
Demographics | |||
Age, yrs | 70.8±9.7 | 50.2–94.9 | 0.342 (<0.001) |
Female | 256 (56.8) | - | 0.024±0.038 (0.531) |
White | 284 (63.3) | - | 0.086±0.039 (0.029) |
Education, yrs | 17.0±2.7 | 8–32 | 0.011 (0.809) |
Height, cm | 167.4±9.3 | 141.6–192.4 | −0.176 (<0.001) |
Weight, kg | 76.3±15.1 | 43.1–138.6 | 0.028 (0.548) |
Health conditions | |||
Former or current smokers | 167 (37.2) | - | 0.020±0.039 (0.614) |
Heart attack | 13 (2.9) | - | −0.104±0.067 (0.360) |
Hypertension | 221 (49.2) | - | 0.085±0.038 (0.026) |
Diabetes | 85 (18.9) | - | 0.114±0.060 (0.060) |
Mean diffusivity in ROIs^, unitless | |||
Precentral gyrus | 1.107±0.117 | 0.872–1.831 | 0.159 (0.001) |
Postcentral gyrus | 1.143±0.119 | 0.907–2.116 | 0.192 (<0.001) |
Supplementary motor cortex | 1.041±0.110 | 0.812–1.918 | 0.217 (<0.001) |
Precuneus | 1.146±0.126 | 0.865–1.858 | 0.335 (<0.001) |
Putamen | 0.811±0.108 | 0.603–1.968 | 0.253 (<0.001) |
Caudate | 0.857±0.126 | 0.653–2.176 | 0.232 (<0.001) |
Thalamus Proper | 0.992±0.096 | 0.809–2.093 | 0.287 (<0.001) |
Middle frontal gyrus | 1.125±0.090 | 0.916–1.415 | 0.204 (<0.001) |
Superior parietal lobe | 1.085±0.116 | 0.801–2.146 | 0.231 (<0.001) |
Anterior cingulate gyrus | 1.224±0.140 | 0.415–1.828 | 0.315 (<0.001) |
Middle cingulate gyrus | 1.183±0.120 | 0.924–1.855 | 0.291 (<0.001) |
Posterior cingulate gyrus | 1.236±0.133 | 0.925–1.710 | 0.333 (<0.001) |
Hippocampus | 1.320±0.170 | 0.970–2.365 | 0.289 (<0.001) |
Parahippocampal gyrus | 1.353±0.164 | 1.020–2.511 | 0.297 (<0.001) |
Entorhinal area | 1.388±0.287 | 0.903–2.844 | 0.178 (<0.001) |
Amygdala | 1.001±0.154 | 0.764–2.463 | 0.189 (<0.001) |
Mobility measures | |||
Lap time variation, sec | 0.81±0.40 | 0.20–3.46 | - |
Use of walking aid | 6 (1.3) | - | - |
Mean lap time, sec | 27.5±6.4 | 15.7–72.8 | 0.621 (<0.001) |
Rapid gait speed, m/sec | 3.7±0.9 | 1.9–8.7 | 0.383 (<0.001) |
Note:
multiplied by 1,000.