Table 4 Means and SD of the quantity and quality of mobility measures over 7 days of continuous monitoring
From: Measuring freezing of gait during daily-life: an open-source, wearable sensors approach
Quantity of mobility | Non-freezers | Freezers | p-value | p-value (adjusted) | ||
|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | |||
Total recording (hours) | 49.7 | 9.3 | 52.0 | 19.4 | 0.600 | 0.855 |
Average turns # | 38.3 | 15.3 | 45.2 | 28.2 | 0.300 | 0.827 |
Average bouts # | 6.2 | 1.0 | 6.3 | 1.4 | 0.680 | 0.312 |
Total bouts time (hours) | 3 | 1.5 | 4.2 | 3.1 | 0.08 | 0.22 |
Freezing proxy | ||||||
Time spent freezing (%) | 15.42 | 4.69 | 20.18 | 10.15 | 0.040 | 0.006 |
CV time spent freezing (−) | 0.848 | 0.224 | 0.703 | 0.206 | 0.024 | 0.007 |
Quality of mobility | ||||||
Average gait speed (m/s) | 0.87 | 0.13 | 0.87 | 0.24 | 0.960 | 0.802 |
Average pitch angle (°) | − 17.0 | 5.1 | − 13.1 | 6.0 | 0.020 | 0.108 |
CV Pitch Angle (−) | − 0.487 | 0.238 | − 0.746 | 0.415 | 0.010 | 0.154 |
Average turn angle (°) | 94.3 | 4.6 | 87.2 | 4.9 | < 0.0001 | < 0.0001 |
Average turn duration (s) | 2.1 | 0.2 | 1.9 | 0.3 | 0.001 | 0.056 |
Average turn peak velocity (°/s) | 77.0 | 9.4 | 80.5 | 12.4 | 0.270 | 0.924 |
CV turn peak velocity (−) | 0.311 | 0.031 | 0.311 | 0.032 | 0.940 | 0.744 |