Comparison of gain in parameters for gas and nongas groups
| Parameter | Gas Group | Nongas Group | P Value* |
|---|---|---|---|
| Kyphosis-angle reduction | 5.3 ± 5.8 | 2.4 ± 4.1 | .064 |
| Wedge-angle reduction | 10.2 ± 7.0 | 4.1 ± 4.6 | .022 |
| Gain | |||
| Anterior height | 23.9 ± 16.6 | 8.4 ± 12.5 | .001 |
| Center height | 19.0 ± 14.3 | 9.3 ± 9.1 | .008 |
| Posterior height | 9.2 ± 11.4 | 4.8 ± 10.2 | .084 |
Note.—For the kyphosis angle: total, n = 53; gas group, n = 34; nongas group, n = 19. For the other parameters: total, n = 73; gas group, n = 39; nongas group, n = 34.
* For the comparison of value in the gas group and those in the nongas group with the independent-sample t test.