TABLE II.
Comparison of Performance Metrics Derived from Supervised 30CSTS, Unsupervised 30CSTS and Daily Life Grouped by Classifier
| Performance Metric | Avg ± SD | Avg ± SD | p | d | |
|---|---|---|---|---|---|
|
| |||||
| Falls: F vs NF | NF (N=16) | F (N=21) | |||
|
| |||||
| Supervised 30CST | Avg of (Chest) Min CC Accel Si-St (2) (g) | −0.06 ± 0.04 | −0.03 ± 0.01 | 0.003 | 0.96 |
| Median of (Chest) Min CC Accel Si-St (2) (g) | −0.05 ± 0.03 | −0.03 ± 0.01 | 0.002 | 0.99 | |
| Max Si-St Time (s) | 1.36 ± 0.27 | 1.74 ± 0.52 | 0.011 | 0.84 | |
| *30CST Performance (# Reps) | 13.1 ± 3.13 | 10.9 ± 2.35 | 0.026 | 0.75 | |
|
| |||||
| Unsupervised 30CST | Avg of (Thigh) Min ML Accel Si-St (2) (g) | −0.13 ± 0.06 | −0.085 ± 0.03 | 0.006 | 0.91 |
| Median of (Chest) Min CC Accel Si-St (2) (g) | −0.06 ± 0.02 | −0.04 ± 0.02 | 0.008 | 0.88 | |
| Avg of (Chest) Min CC Accel Si-St (2) (g) | −0.06 ± 0.02 | −0.04 ± 0.02 | 0.014 | 0.83 | |
| Median of Max St-Si Time (s) | 1.16 ± 0.22 | 1.44 ± 0.40 | 0.021 | 0.77 | |
|
| |||||
| Daily Life | Avg Si-St Time (s) | 2.86 ± 0.10 | 3.04 ± 0.15 | 0.0002 | 1.15 |
| Med Si-St Time (s) | 2.80 ± 0.12 | 2.94 ± 0.15 | 0.004 | 0.91 | |
|
| |||||
| Pyramidal: NPI vs PI | NPI (N=23) | PI (N=14) | |||
|
| |||||
| Supervised 30CST | 5th Percentile (Chest) CC Accel St-Si (1) (g) | −0.14 ± 0.07 | −0.067 ± 0.03 | 0.001 | 1.03 |
| Avg of (Chest) Min CC Accel St-Si (1) (g) | −0.08 ± 0.04 | −0.05 ± 0.02 | 0.002 | 0.98 | |
| Min St-Si Time (s) | 1.08 ± 0.27 | 1.38 ± 0.26 | 0.001 | 1.00 | |
| Median Si-St Time (s) | 1.18 ± 0.27 | 1.49 ± 0.32 | 0.002 | 0.95 | |
| Avg Si-St Time (s) | 1.18 ± 0.26 | 1.52 ± 0.33 | 0.001 | 0.99 | |
| Median St-Si Time(s) | 1.21 ± 0.28 | 1.50 ± 0.26 | 0.002 | 0.95 | |
| Avg St-Si Time (s) | 1.21 ± 0.28 | 1.51 ± 0.27 | 0.002 | 0.95 | |
| Max St-Si Time (s) | 1.35 ± 0.33 | 1.66 ± 0.31 | 0.004 | 0.87 | |
| *30CST Performance (# reps) | 13.0 ± 2.80 | 10.0 ± 1.90 | <0.001 | 1.03 | |
|
| |||||
| Unsupervised 30CST | Median of Min Si-St Time (s) | 0.94 ± 0.20 | 1.23 ± 0.35 | 0.004 | 0.97 |
| Median Si-St Time (s) | 1.05 ± 0.21 | 1.38 ± 0.40 | 0.003 | 1.00 | |
|
| |||||
| Daily Life | CV of Peak (Thigh) CC Si-St (2) (g) | 0.90 ± 0.23 | 1.12 ± 0.26 | 0.010 | 0.85 |
| Avg Si-St Time (s) | 2.93 ± 0.14 | 3.03 ± 0.16 | 0.047 | 0.67 | |
| Avg of (Thigh) Min AP Accel Si-St (2) (g) | −0.47 ± 0.20 | −0.36 ± 0.12 | 0.050 | 0.64 | |
|
| |||||
| Sensory: NSI vs SI | NSI (N=11) | SI (N=29) | |||
|
| |||||
| Supervised 30CST | Median of (Chest) Min ML Accel St-Si (1) (g) | −0.038 ± 0.01 | −0.026 ± 0.01 | 0.002 | 1.07 |
| Avg of (Chest) Min AP Accel St-Si (1) (g) | −0.056 ± 0.03 | −0.035 ± 0.01 | 0.005 | 0.99 | |
| Avg of (Chest) Min CC Accel St-Si (1) (g) | −0.085 ± 0.04 | −0.054 ± 0.02 | 0.007 | 0.95 | |
| 5th Percentile (Chest) AP Accel St-Si (1) (g) | −0.092 ± 0.05 | −0.056 ± 0.02 | 0.006 | 0.96 | |
| Avg of (Chest) Min ML Accel St-Si (1) (g) | −0.041 ± 0.02 | −0.029 ± 0.01 | 0.005 | 0.98 | |
| *30CST Performance (# Reps) | 13.5 ± 3.39 | 11.1 ± 2.36 | 0.020 | 0.83 | |
|
| |||||
| Daily Life | 95th Percentile AP Accel Si-St (1) (g) | 0.383 ± 0.18 | 0.830 ± 0.63 | 0.018 | 0.80 |
| Avg of Peak AP Accel Si-St (1) (g) | 0.178 ± 0.08 | 0.424 ± 0.37 | 0.023 | 0.77 | |
| Avg of Peak AP Accel Si-St (2) (g) | 0.201 ± 0.10 | 0.417 ± 0.36 | 0.043 | 0.69 | |
*
Included for reference to current standard of care (counting repetitions performed in 30 seconds).
F: fallers, NF: non-fallers, NPI: minimal pyramidal impairment, PI: pyramidal impairment, NSI: minimal sensory impairment, SI: sensory impairment CC: cranial-caudal, ML: medial-lateral, AP: anterior-posterior, 30CST: 30-second chair stand test, reps: repetitions, si-st: sit-to-stand, st-si: stand-to-sit. P-values represent group comparisons based on evaluated using Cohen’s d.