Table 3:

Association among spinal segment variants

	Cervical Rib	TLTV	ILL^{^a}	LSTV
	OR (95% CI), P Value	OR (95% CI), P Value	OR (95% CI), P Value	OR (95% CI), P Value
ILL^{^a}	–	–	–	2.10 (0.79–5.31), .121
TLTV	–	–	1.50 (0.42–4.29), .482	1.87 (1.08–3.20), .023
Cervical rib	–	2.70 (0.92–7.09), .053	4.86 (1.06–16.54), .020	3.28 (1.29–8.47), .012
Spinal segment distribution variant^{^b}	2.44 (0.92–6.19), .062	66.13 (30.34–166.85), <.001	3.06 (1.18–7.80), .018	5.47 (3.43–8.80), <.001

Note:—The en dash indicates duplicate entries.
↵a Inability to visualize iliolumbar ligament.
↵b An atypical number of presacral segments or an atypical distribution of thoracolumbar vertebrae.