Table 1. Demographic Characteristics of the Patients ^a.

Demographic Characteristic	Parasagittal b	TF b	P Value
Age, y	49.2 ± 15.5	50.5 ± 16.6	0.32
Gender (Male/Female)	19/13	20/12	0.52
BMI, kg/m2	22.1 ± 3.4	21.7 ± 3.1	0.17
Duration of pain, mo	8.7 ± 6.5	8.7 ± 7.9	0.67
Pre-procedure NRS	7.1 ± 2.5	7.5 ± 2.4	0.13
Pre-procedure ODI, %	55.2 ± 12.4%	53.6 ± 16.1%	0.082

^a Abbreviations: BMI, Body Mass Index; NRS, Numeric Rating Scale; ODI, Oswestry Disability Index.

^b n = 32.