Table 1 Patients data according to the four outcome subgroups
Improved | Stable | Progressed below 50° | Progressed beyond 50° | Total | |
|---|---|---|---|---|---|
Number of patients | 20 | 18 | 31 | 10 | 79 |
% | 25.3 | 22.8 | 39.2 | 12.7 | 100.0 |
Single/Double | 7/13 | 7/11 | 20/11 | 5/5 | 39/40 |
Initial age (years) | 14.3 12-16 | 13.8 13-17 | 13.7 13-15 | 12.4 10-15 | 13.5 10-17 |
Initial Cobb angle (°) | 33.5 23.0-45.0 | 30.8 22.0-38.0 | 31.2 22.0-39.0 | 34.3 27.0-45.0 | 32.9 22.0-45.0 |
Initial rotation (median) | 3 | 2 | 3 | 3 | 3 |
Initial Risser (median) | 3 | 2 | 0 | 0 | 1 |
Bracing time (years) | 2.6 2.0-5.0 | 2.4 1.0-4.0 | 3.7 2.0-5.0 | 2.3 1.0-4.0 | 2.7 1.0-5.0 |
Follow-up Cobb angle (°) | 23.2 12.0-39.0 | 32.3 26.0-40.0 | 39.0 33.0-46.0 | 57.2 53.0-72.0 | 37.9 12.0-72.0 |
Follow-up Cobb change (°) | -9.8 | ± 5.0 | +7.7 | +15.0 | +9.2 |
Follow-up rotation (median) | 3 | 2 | 3 | 3 | 3 |