Table 4 Subgroup analysis suggested by the SRS Committee
| Â | Â | Total population | Improved | Unchanged | Worsened | Over 45 | Surgery |
|---|---|---|---|---|---|---|---|
Number of major curves | Single | 38 | 22 | 14 | 2 | 0 | 0 |
| Â | Double major | 32 | 13 | 15 | 2 | 1 | 1 |
| Â | Triplemajor | 2 | 1 | 1 | 0 | 0 | 0 |
Topographic classification | Thoracic | 12 | 5 | 6 | 1 | 0 | 0 |
| Â | Thoracolumbar | 16 | 12 | 4 | 0 | 0 | 0 |
| Â | Lumbar | 10 | 5 | 4 | l | 0 | 0 |
| Â | Thoracic-Lumbar | 16 | 6 | 7 | 1 | 1 | 1 |
| Â | Thracic-Thoracolumbar | 13 | 6 | 6 | 1 | 0 | 0 |
| Â | Double thoracic | 3 | 1 | 2 | 0 | 0 | 0 |
| Â | Double thoracic- lumbar | 2 | 1 | 1 | 0 | 0 | 0 |
Curvature type | Typical | 61 | 32 | 23 | 4 | 1 | 1 |
| Â | Atypical | 11 | 4 | 7 | 0 | 0 | 0 |
Magnitude of curvature | 25-30 | 40 | 21 | 18 | l | 0 | 0 |
| Â | 31-35 | 20 | 8 | 10 | 2 | 0 | 0 |
| Â | 36-40 | 12 | 7 | 2 | 1 | 1 | 1 |
Skeletal maturity | Risser 0 | 48 | 23 | 21 | 2 | 1 | 1 |
| Â | Risser 1 | 10 | 5 | 3 | 2 | 0 | 0 |
| Â | Risser 2 | 14 | 8 | 6 | 0 | 0 | 0 |
Brace | Sibilla | 45 | 27 | 17 | 1 | 0 | 0 |
| Â | Lyon/Sforzesco | 20 | 7 | 11 | 2 | 1 | 1 |
| Â | SpineCor | 5 | 2 | 2 | 1 | 0 | 0 |
Dosage of bracing | Full-time | 30 | 12 | 15 | 3 | 1 | 1 |
| Â | Intermediate | 21 | 12 | 9 | 0 | 0 | 0 |
| Â | Part-time | 22 | 12 | 9 | 1 | 0 | 0 |