Predicting the Failure Risk of Internal Fixation Devices in Chinese Patients Undergoing Spinal Internal Fixation Surgery: Development and Assessment of a New Predictive Nomogram

Table 3

Prediction factors for spinal internal fixation device failure.

Intercept and variable	Prediction model
	β	Odds ratio	2.5% CI	97.5% CI	value
Intercept	-1.035	0.355	0.156	0.764	0.010
Gender	-0.438	0.645	0.351	1.167	0.151
Age	-0.797	0.451	0.240	0.852	0.013
Scoliosis	1.988	7.301	3.290	16.013	<0.001
Unilateral or bilateral fixation	-1.363	0.256	0.126	0.543	<0.001

β is the regression coefficient; CI, confidence interval.