Figure and Table | Characteristics of Fresh Lumbar Spondylolysis Occurring below the Age of 9 Years

Table 1. Characteristics of U-9 and O-10 Pathogenesis.

		U-9	O-10	P-value
		(10 cases)	(41 cases)	P-value
- Sex	Male	9	34	1
- Sex	Female	1	7	1
- SBO	(+)	8	9	0.001
- SBO	(−)	2	32	0.001
- Vertebral body level	L5	10	30	0.09
- Vertebral body level	Other	0	11	0.09
- Unilateral or bilateral	Unilateral	1	22	0.015
- Unilateral or bilateral	Bilateral	9	19	0.015
- Contralateral terminal stage	(+)	6	7	0.011
- Contralateral terminal stage	(−)	4	34	0.011

Table 2. Comparison between U-9 and O-10 in Terms of Disease Stages.

Table 3. Comparison of Bone Union Rates between U-9 and O-10.