Table 3.
Univariate linear regression models by age group. Thoracic Cobb angle, Thoracolumbar Cobb angle and Lumbar Cobb angle are the dependent variables. Rib-index is the independent variable
| Dependent variable | Age group | Explanatory variable | Unstandardized beta coefficient | Standard Error | t | p-value | [95% Conf. Interval] | |
| Thoracic Cobb angle | 7–13 | Rib-index | 2.283 | 3.369 | 0.680 | 0.502 | -4.520 | 9.086 |
| Constant | 3.496 | 5.306 | 0.660 | 0.514 | -7.221 | 14.212 | ||
| Thoracic Cobb angle | 14–18 | Rib-index | 7.974 | 3.524 | 2.260 | 0.030 | 0.805 | 15.144 |
| Constant | -6.357 | 5.474 | -1.160 | 0.254 | -17.494 | 4.781 | ||
| Thoracolumbar Cobb angle | 7–13 | Rib-index | -0.946 | 0.902 | -1.050 | 0.302 | -2.782 | 0.890 |
| Constant | 1.724 | 1.402 | 1.230 | 0.227 | -1.128 | 4.576 | ||
| Thoracolumbar Cobb angle | 14–18 | Rib-index | 3.116 | 2.827 | 1.100 | 0.277 | -2.594 | 8.826 |
| Constant | -1.605 | 4.454 | -0.360 | 0.720 | -10.600 | 7.390 | ||
| Lumbar Cobb angle | 7–13 | Rib-index | 0.804 | 4.229 | 0.190 | 0.850 | -7.799 | 9.408 |
| Constant | 6.320 | 6.569 | 0.960 | 0.343 | -7.045 | 19.684 | ||
| Lumbar Cobb angle | 14–18 | Rib-index | 1.901 | 3.252 | 0.580 | 0.562 | -4.666 | 8.469 |
| Constant | 1.876 | 5.123 | 0.370 | 0.716 | -8.469 | 12.222 | ||