Table 4.
Comparing control subjects with PD, PD normal gait and PD normal balance patients: group means, standard deviations and p values for select clinical measures and iTUG and iSway diagnosis prediction variables.
| Control (N=66) | PD (N=135) | PD normal gait (N=40) | PD normal balance (N=114) | p-val PD vs Con | p-val PD nl gait vs Con | p-val PD nl bal vs Con | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Measure | Mean | SD | Mean | SD | Mean | SD | Mean | SD | ||||
| Age | 62.96 | 9.52 | 64.00 | 9.87 | 63.03 | 10.39 | 63.46 | 9.61 | 0.47 | 0.97 | 0.73 | |
| MDS-UPDRS Part III | 26.08 | 12.80 | 17.08 | 7.08 | 24.40 | 10.94 | ||||||
| MDS-UPDRS Part III PIGD subscore | 2.32 | 2.40 | 0.40 | 0.78 | 1.75 | 1.72 | ||||||
| iTUG | Turn To Sit: Peak Turn Velocity | 178.19 | 36.40 | 150.86 | 38.50 | 167.49 | 43.77 | 153.79 | 37.59 | 0.000 | 0.230 | 0.000 |
| Gait: RoM Trunk horizontal [CoV] | 0.19 | 0.10 | 0.14 | 0.09 | 0.14 | 0.08 | 0.14 | 0.09 | 0.001 | 0.010 | 0.000 | |
| Gait: Stride Length [Mean] | 82.40 | 5.79 | 77.70 | 9.35 | 81.76 | 6.93 | 79.28 | 7.93 | 0.000 | 0.590 | 0.010 | |
| Turn: Number of steps [Mean] | 4.50 | 1.13 | 5.20 | 1.21 | 4.74 | 1.20 | 5.16 | 1.12 | 0.000 | 0.350 | 0.000 | |
| Gait: Peak Swing Velocity R [CoV] | 0.04 | 0.01 | 0.05 | 0.03 | 0.05 | 0.02 | 0.05 | 0.02 | 0.001 | 0.040 | 0.030 | |
| Turn: Duration [Mean] | 2.27 | 0.59 | 2.65 | 0.72 | 2.36 | 0.57 | 2.58 | 0.61 | 0.000 | 0.520 | 0.000 | |
| Turn To Sit: RoM Trunk | 25.90 | 9.95 | 21.80 | 7.27 | 22.06 | 7.28 | 21.83 | 6.88 | 0.004 | 0.040 | 0.000 | |
| Gait: RoM Knee [Mean] | 56.11 | 4.60 | 53.46 | 5.36 | 55.60 | 5.27 | 54.18 | 5.05 | 0.000 | 0.630 | 0.010 | |
| Gait: RoM Knee R [Mean] | 54.18 | 5.71 | 50.91 | 6.65 | 53.15 | 6.27 | 51.66 | 6.22 | 0.000 | 0.350 | 0.010 | |
| Turn: Peak Velocity [Mean] | 160.04 | 31.39 | 142.60 | 33.98 | 156.50 | 37.20 | 144.85 | 32.63 | 0.000 | 0.640 | 0.000 | |
| iSway | Path length | 5.13 | 1.49 | 8.71 | 11.04 | 6.98 | 6.55 | 7.41 | 8.91 | 0.000 | 0.030 | 0.040 |
| High frequency power (AP) | 9.52 | 6.44 | 15.17 | 16.52 | 12.48 | 11.40 | 14.63 | 15.93 | 0.001 | 0.090 | 0.010 | |
| Mean distance (ML) | 0.02 | 0.01 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 | 0.000 | 0.020 | 0.020 | |
| Normalized jerk (AP) | 1.08 | 0.22 | 1.21 | 0.48 | 1.17 | 0.25 | 1.17 | 0.39 | 0.006 | 0.040 | 0.090 | |
| Path length (AP) | 3.91 | 1.25 | 6.01 | 7.05 | 5.15 | 4.80 | 5.38 | 6.58 | 0.001 | 0.050 | 0.070 | |
| Mean frequency | 0.48 | 0.13 | 0.55 | 0.28 | 0.52 | 0.13 | 0.52 | 0.20 | 0.008 | 0.100 | 0.080 | |
| Normalized jerk | 4.72 | 0.88 | 5.25 | 2.21 | 5.07 | 0.91 | 5.03 | 1.40 | 0.016 | 0.060 | 0.110 | |
| Range of acceleration | 0.37 | 0.13 | 0.48 | 0.39 | 0.43 | 0.30 | 0.44 | 0.32 | 0.005 | 0.160 | 0.120 | |
| Total sway area | 0.00 | 0.00 | 0.01 | 0.04 | 0.01 | 0.02 | 0.01 | 0.04 | 0.006 | 0.080 | 0.160 | |
| Mean velocity (ML) | 0.03 | 0.02 | 0.05 | 0.05 | 0.04 | 0.05 | 0.04 | 0.04 | 0.005 | 0.090 | 0.070 | |