Table 3 Clinical measures and stimulation parameters for high-frequency stimulation (HFS) and low-frequency stimulation (LFS) during self-selected comfortable and quick walking speeds
HFS | LFS | Sig | |
|---|---|---|---|
Mean (SD) | Mean (SD) | ||
Clinical measures | |||
MDS-UPDRS III | 32.7 (10.7) | 30.9 (9.8) | 0.675 |
Retropulsion test | 1.4 (1.3) | 1.1 (1.2) | 0.623 |
Comfortable 6 m walk test (s) | 5.3 (0.9) | 5.4 (1.2) | 0.809 |
Quick 6 m walk test (s) | 4.1 (0.8) | 4.1 (0.9) | 0.837 |
Timed up and go (s) | 18.9 (5.7) | 17.4 (3.4) | 0.513 |
Stimulation parameters | |||
Frequency (Hz) | 126.1 (12.3) | 60.0 (0.0) | < 0.001 |
Amplitude (V) | 3.3 (0.7) | 4.7 (1.1) | < 0.001 |
Pulse width (μsec) | 62.1 (5.5) | 62.1 (5.5) | 1.000 |