Table 2.

Possible categorical variables.

		Treatment Success
		Successful(n = 124)		Unsuccessful(n = 95)
		n	%	n	%	p
Sex	Female	70	56.5%	48	50.5%	0.383
	Male	54	43.5%	47	49.5%
Level of injection	S1 foramen	60	48.4%	44	46.3%	0.508
	L5-S1	60	48.4%	50	52.6%
	L4-5	4	3.2%	1	1.1%
Grade of nerve root compression	Low-grade	55	46.6%	44	48.4%	0.803
	High-grade	63	53.4%	47	51.6%
Transitional vertebrae	Present	9	7.3%	9	9.5%	0.554
	Absent	115	92.7%	86	90.5%