Comparison of Incidences of Intravascular Injection between Medial and Lateral Side Approaches during Traditional S1 Transforaminal Epidural Steroid Injection

Table 2

Incidence of intravascular injection during S1 transforaminal epidural steroid injection.

	Group M ()	Group L ()	value
Epidural only,	78 (95.1%)	51 (61.4%)	<0.001
All vascular,	4 (4.9%)	32 (38.6%)	<0.001
Epidural and vascular	4 (4.9%)	13 (15.7%)	0.023
Vascular only	0	19 (22.9%)	<0.001

Values are expressed as the mean ± standard deviation or number of patients (%). Group M, medial approach group; Group L, lateral approach group; SIVD, superior aspect of the L5-S1 intervertebral disc. value < 0.05.