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

N - number of patients; Single/Double- number of patients with Single versus Double curvatures.

Mean value and the range are given for age, Cobb angle and duration of bracing.