Table 1 Results of regression analysis to predict annual change in mandibular length
Independent variables | Parameter estimate | Error | p value |
|---|---|---|---|
Intercept | −4.27893 | 6.06406 | 0.48 |
Average IGF-1 in μg/L | 0.01203 | 0.00479 | 0.02 |
IGF-1 change in μg/L | 0.00864 | 0.00316 | 0.01 |
Initial mandibular length in mm | 0.02822 | 0.06394 | 0.66 |
Male gender (female is the reference group) | 0.91686 | 0.75568 | 0.23 |
Skeletal class I (reference group) | Reference | - | - |
Skeletal class II | −0.26483 | 0.79831 | 0.74 |
Skeletal class III | 3.08272 | 1.06271 | 0.006 |
Cervical group A | 0.16312 | 0.86144 | 0.85 |
Cervical group B | 1.73768 | 1.10008 | 0.1235 |
Cervical group C (reference group) | Reference | - | - |