Table 3.
Comparison of modified Mallet scores and SHEAR deformity parameters before and after triangle tilt surgery in patients with C5–T1 injury
| Modified mallet functions scoring scale = 1–5 | Pre-triangle tilt | Post-triangle tilt | Difference in mean values | Significance |
|---|---|---|---|---|
| Mean ± SEM | ||||
| Abduction | 3.9 ± 0.1 | 3.8 ± 0.1 | 0.1 | p = 0.41 |
| Hand-to-mouth | 1.7 ± 0.7 | 2.7 ± 0.2 | 1 | p < 0.0001* |
| Hand-to-neck | 2.2 ± 0.6 | 2.7 ± 0.7 | 0.1 | p < 0.001* |
| Hand-to-spine | 2 ± 0.1 | 2.3 ± 0.1 | 0.3 | p = 0.016* |
| External rotation | 2.2 ± 0.1 | 2.9 ± 0.2 | 0.7 | p < 0.0001* |
| Supination (°) | −37 ± 7 | −2 ± 8 | 34.4 | p = 0.001* |
| Overall Mallet score | 11.9 ± 0.4 | 14.4 ± 0.4 | 2.5 | p < 0.0001* |
| SHEAR deformity | ||||
| Posterior subluxation (%) | 13 ± 7.3 | 30.4 ± 4.5 | 17.5 | p = 0.01* |
| Glenoid version (°) | −28 ± 5 | −16.5 ± 4 | 11.5 | p = 0.0026* |
| Scapular elevation (%) | 6.4 ± 2 | 2.9 ± 0.1 | 3.6 | p = 0.045* |
Angle of apparent active supination was recorded as follows: 0° = neutral position, 90° = full apparent supination, −90° = full apparent pronation
*Statistically significant difference (p < 0.05)