Table 4.

Results at +- 5°

	Improvement >5°	Stable +-5°	Progression > 5°
Lyon Thoracic (thoracic) 285 cases	140 54.26%	85 32.95%	33 12.79%
Lyon Thoracic (double major) 351 cases	208 59.26%	127 36.18%	16 4.57%
Lyon Thoraco-Lumbar 279 cases	189 67.74%	76 27.24%	14 5.02%
Lyon Lumbar 450 cases	362 80.44%	84 18.66%	4 0.88%
Total 1338 cases	899 67.19%	372 27.80%	67 5.00%

- Good, i.e. an improvement of more than 5° according to the initial curve

- Stable, i.e. +- 5° according to the initial curve

- Failure, i.e. a progression of more than 5° according to the initial curve For double major scoliosis, half the sum of the two curves is compared.