Table 7.

Multivariate analysis of factors associated with facet degeneration according to levels

		P	OR	95%CI
C2-C3
Gender	Male	0.043	2.961	1.037	8.453
	Female	Reference
Age	<50	0.001	3.410	1.605	7.246
	≥50	Reference
Tropism-T	Symmetric	0.003	10.998	2.224	54.378
	Moderate	0.003	11.256	2.273	55.739
	Severe	Reference
Tropism-S	Symmetric	0.022	9.121	1.371	60.661
	Moderate	0.022	9.885	1.399	69.854
	Severe	Reference
C3-C4
Age	<50	0.000	5.522	2.273	13.410
	≥50	Reference
Tropism-S	Symmetric	0.001	10.765	2.697	42.960
	Moderate	0.021	6.774	1.331	34.470
	Severe	Reference
C4-C5
Age	<50	0.002	3.944	1.648	9.442
	≥50	Reference
Tropism-S	Symmetric	0.006	8.352	1.838	37.950
	Moderate	0.358	2.036	0.447	9.284
	Severe	Reference
C5-C6
Age	<50	0.000	5.458	2.317	12.857
	≥50	Reference
Tropism-S	Symmetric	0.005	22.343	2.546	196.109
	Moderate	0.010	21.616	2.118	220.648
	Severe	Reference
C6-C7
Tropism-S	Symmetric	0.001	44.059	4.569	424.904
	Moderate	0.001	269.824	8.699	8368.862
	Severe	Reference

Only those factors with a p value smaller than 0.05 is listed here