Table 1.

Patient data

Group	No. cases	Sex		Age (years)	Distribution of pathologic vertebrae
		F	M		Thoracic	Thoracolumbar	Lumbar
A	74	41	33	38.3 ± 1.3	39	27	8
B	83	51	32	39.8 ± 1.3	13	11	59
Total	157	92	65	39.1 ± 1.4	52	38	67