Distribution of GSSs across the spinal levels according to Sridhar’s classification.
| Spinal level | Sridhar classification | |||||
|---|---|---|---|---|---|---|
| Type I | Type II | Type III | Type IVb | Type V | Total | |
| Cervical + cervicothoracic junction | 1 | 1 | 2 | |||
| Thoracic + thoracolumbar junction | 1 | 1 | 3 | 5 | ||
| Lumbar | 1 | 4 | 3 | 8 | ||
| Sacral | 3 | 3 | ||||