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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
  1. p-values from linear mixed models are reported, considering (p-value adjusted) or not (p-value) disease duration as covariate, p-values < 0.05 are in bold