Table 1.

Castellvi types by disc level that are significantly associated with higher disc degeneration vs controls

Castellvi type	Coefficient	Standard error	Wald chi2	p value	OR	95% CI
L1/2
Type II	0.995	0.470	4.486	0.034	2.705	1.077–6.796
Type IV	1.658	0.766	4.680	0.031	5.247	1.169–23.560
Pooled	1.016	0.422	5.814	0.016	2.763	1.210–6.312
L2/3
Type I	0.680	0.344	3.915	0.048	1.975	1.006–3.875
L3/4
Type II	1.299	0.361	12.954	< 0.001	3.667	1.807–7.442
Type III	0.833	0.386	4.652	0.031	2.301	1.079–4.905
Pooled	1.004	0.329	9.342	0.002	2.730	1.434–5.200
L4/5
Type II	1.060	0.283	13.981	< 0.001	2.886	1.656–5.031
Type III	0.983	0.280	12.350	< 0.001	2.672	1.544–4.623
Type IV	2.152	0.510	17.784	< 0.001	8.600	3.164–23.380
Pooled	1.112	0.244	20.724	< 0.001	3.040	1.884–4.906
L5/S1
Type II	− 1.342	0.333	16.292	< 0.001	0.261	0.136–0.501
Type III	− 2.088	0.424	24.291	< 0.001	0.124	0.054–0.284
Type IV	− 1.879	0.790	5.660	0.017	0.153	0.033–0.718
Pooled	− 1.631	0.289	31.823	< 0.001	0.196	0.111–0.345

Binomial logistic regression analysis was performed using age, gender, and Castellvi type at every lumbar level. Pooled group is a combined group consisting of Castellvi type II, III, and IV groups

CI confidence interval, OR odds ratio