Group | Subgroup | Sex F/M | Mean age (years) | Mean Cobb angle (degrees) | Girls after menarche | Risser 0/1/2 |
---|---|---|---|---|---|---|
A | A1 | 44/8 | 11.9 | 17.7 | 18 | 31/2/19 |
10°-25° | A2 | 24/2 | 11, 1 | Th 16.5 | 5 | 9/2/5 |
 |  |  |  | ThL/L 15.9 |  |  |
B | B1 | 3/2 | 12.8 | 28.6 | 1 | 3/0/2 |
26°-40° | B2 | 31/1 | 12.9 | Th 31.0 | 16 | 18/3/11 |
 |  |  |  | ThL/L 31.2 |  |  |