Table 5.

Multivariate Logistic Regression Model for the Outcome of Out-of-Brace Deterioration.

Baseline parameter	Regression coefficient (B)	Wald X2	P-value	Odds ratio	95% CI	Power
For thoracic curves	X2(2) = 6.298, P = .043*, Nagelkerke R2 = 0.147, correct prediction = 79.0%					0.10
Constant	−9.970	4.365	.022*
Age at bracing (Months)	0.051	3.537	.060	1.052	0.998-1.110
Flexibility rate (%)	0.053	4.010	.045*	1.055	1.001-1.111
For double/triple curves	X 2 (3) = 11.625, P = .009, Nagelkerke R 2 = 0.323, correct prediction = 69.8%					0.10
Constant	2.181	4.041	.044
Risser sign (Reference: Risser 2)		4.794	.091
Risser 0	−1.537	2.446	.118	0.215	0.031-1.476
Risser 1	−3.087	4.606	.032*	0.046	0.003-0.765
Correction rate (%)	−0.058	4.475	.034*	0.944	0.894-0.996

Abbreviation: CI, confidence interval.

^*Significance at P-value < .05.