Table 1.
Baseline Characteristics.
| Parameter count (Column %) | In-brace deterioration | Out-of-brace deterioration | P value^ | Power |
|---|---|---|---|---|
| Cases (Count, %) | 95 (71.4) | 38 (28.6) | ||
| Sex | .999 | 0.05 | ||
| Female | 80 (84.2) | 32 (84.2) | ||
| Male | 15 (15.8) | 6 (15.8) | ||
| Curve type | .264 | 0.92 | ||
| Thoracic | 48 (50.5) | 14 (36.8) | ||
| Double/ triple curves | 27 (28.4) | 16 (42.1) | ||
| Thoracolumbar | 20 (21.1) | 8 (21.1) | ||
| Risser stage | 0.023*# | 0.13 | ||
| 0 | 72 (75.8) | 26 (68.4) | ||
| 1 | 19 (20.0) | 5 (13.2) | ||
| 2 | 4 (4.2)□ | 7 (18.4) | ||
| Menarche | .191 | 0.88 | ||
| Pre | 46 (57.5) | 22 (71.0) | ||
| Post | 34 (42.5) | 9 (29.0) | ||
| Operation | .079 | 0.96 | ||
| Yes | 35 | 8 | ||
| No | 60 | 30 | ||
| Bracing success rate | 63.2% | 78.9% |
^Chi-square test unless stated otherwise.
#Fisher’s exact test.
*Statistical significance.
□z-test for independent proportions were run throughout all parameters in the table. Within each row, each possible pair of percentages is compared using a z-test and there was no significant difference at the level of 0.05 level—except for the proportion of Risser stage 2 patients, counts and proportions of in-brace-deterioration group [4.2% (n = 4)] is significantly different from 18.4% (n = 7) of out-of-brace deterioration group.