Figure 1.
Mean Percentage Change in Total Toronto Western Spasmodic Torticollis Scale (TWSTRS) and Subscores in Patients Treated with Multichannel and Single-Channel Electromyographic Botulinum Toxin Injections.
Multichannel electromyographic mapping was associated with improved outcome in all subscales and total TWSTRS scores, although it only reached statistical significance in the disability susbcale.
Figure 2.
Mean and Median Change in Total Toronto Western Spasmodic Torticollis Scale, using Multichannel and Single-Channel Electromyographic Technique
(mean value, dotted line; median value, solid line).
Table 1.
Mean and Median Point Change and Mean Percentage Improvement in Total TWSTRS and TWSTRS Subscores in Patients Treated with Both Multichannel and Single-Channel Electromyography
| Multichannel EMG: Mean Point Change±SD (mean percentage change) | Multichannel EMG: Median Point Change (±IQR) | Single-channel EMG: Mean Point Change±SD (mean percentage change) | Single-channel EMG: Median Point Change±IQR | p-Value | |
| Total TWSTRS | 13.44±9.95(23.5%) | 8.5 (±16.25) | 5.1 ±9.73(9%) | 3.5 (±12) | p = 0.11 |
| TWSTRS severity | 5.33±4.79(24.7%) | 4 (±5) | 2.33 (±2.87)(11.9%) | 1 (±4) | p = 0.06 |
| TWSTRS disability | 2.77±2.38(16.1%) | 3 (±2) | 1.33 (±4.82)(4.9%) | 1(± 4) | p = 0.04 |
| TWSTRS pain | 2.88±3.67(19.7%) | 2.25 (±5.25) | 1.41 (±3.48)(15.5%) | 1.5(±1.75) | p = 0.26 |
| Mean number of neurotoxin units injected | 231 | 216 | p = 0.90 |