Table 3 Results from linear regression analyses for gait characteristics, physical function and physical activity, on cognitive function, adjusted for age
No or questionable dementia vs. Mild dementia Group 1 vs. Group 2 | No or questionable dementia vs. Moderate to severe dementia Group 1 vs. Group 3 | Mild dementia vs. Moderate to severe dementia Group 2 vs Group 3 | Overall group effect | ||||
|---|---|---|---|---|---|---|---|
Characteristics | Mean difference (95% CI) | P-value | Mean difference (95% CI) | P-value | Mean difference (95% CI) | P-value | P-value |
Gait | |||||||
Gait speed (m/s) | 0.163 (0.053 to 0.273) | 0.004 | 0.208 (0.076 to 0.339) | 0.002 | 0.045 (-0.085 to 0.174) | 0.496 | 0.002 |
Step time (s) | -0.043 (-0.082 to -0.005) | 0.029 | -0.035 (-0.082 to -0.011) | 0.134 | 0.008 (-0.038 to 0.054) | 0.730 | 0.001 |
Walk ratio, SL/Cad | 0.03 (-0.01 to 0.08) | 0.149 | 0.05 (-0.01 to 0.10) | 0.111 | 0.01 (-0.04 to 0.07) | 0.696 | 0.198 |
SD stride velocity (cm/s) | -0.209 (-0.819 to 0.401) | 0.497 | -0.070 (-0.795 to 0.655) | 0.848 | -0.139 (-0.578 to 0.856) | 0.701 | 0.788 |
Physical function | |||||||
SPPB, score | 1.7 (0.5 to 2.8) | 0.005 | 1.8 (0.5 to 3.2) | 0.009 | 0.2 (-1.1 to 1.5) | 0.783 | 0.007 |
Physical activity | |||||||
Upright time, minutes | 78.9 (18.9 to 139.0) | 0.011 | 62.1 (-10.6 to 134.7) | 0.093 | -16.9 (-88.5 to 54.8) | 0.641 | 0.031 |
Upright events, number | 1.6 (-5.5 to 8.7) | 0.661 | 2.1 (-6.5 to 10.7) | 0.632 | 0.5 (-8.0 to 9.0) | 0.906 | 0.862 |
Length of upright events, max | 14.8 (-5.5 to 35.2) | 0.151 | 16.0 (12.4, -8.6 to 40.7) | 0.199 | 1.2 (-23.1 to 25.5) | 0.922 | 0.271 |