Chronological | Angular | Topographic | |||||
---|---|---|---|---|---|---|---|
Age at diagnosis (years.months) | Cobb degrees | Â | Apex | ||||
 |  |  |  |  |  | from | to |
Infantile | 0-2.11 | Low | Low | 5-15 | Cervical | - | Disc C6-7 |
Juvenile | 3-9.11 | Â | Low to moderate | 16-24 | Cervico-thoracic | C7 | T1 |
Adolescent | 10-17.11 | Moderate | Moderate | 25-34 | Thoracic | Disc T1-2 | Disc T11-12 |
Adult | 18- | Â | Moderate to severe | 35-44 | Thoraco-lumbar | T12 | L1 |
 |  | Severe |  | 45-59 | Lumbar | Disc L1-2 | - |
 |  | Very severe |  | 60 or more |  |  |  |