Patient distribution according to age, gender, and spinal segment.
| Segment | n | Age, y, Mean ± SD | Gender: n (%) |
| Cervical | 33 | 29.45 ± 9.62 | M: 16 (48.5); F: 17 (51.5) |
| Thoracic | 32 | 30.94 ± 7.29 | M:11 (34.4); F: 21 (65.6) |
| Lumbar | 35 | 33.77 ± 9.8 | M: 16 (45.7); F: 19 (54.3) |
Abbreviations: F, female; M, male.