Table 1.

Demographics of the subjects in the two groups

Demographics	Group A	Group B	p-value
No. of patients	35	34	NS
Age range, y	30–60	30–59	NS
No. of women/men	15/20	16/18	NS
BMI range, kg/m2	20–30	19–30	NS
Symptom duration range	9.5 months to 24 years	8.5 months to 24 years	NS
Operated level, No.
L3-L4/L4-L5/L5-S1	7/19/9	7/17/10	NS

Abbreviation: NS not significant

P value was compared by chi-square test, except for age, which was compared by t test