Table I.

Demographic data of the patients.

Patient no.	Gender	Age (years)	Location of lumbar disc herniation	Pfirrmann grade
1	Male	46	L4/L5	IV
2	Female	50	L5/S1	V
3	Male	57	L4/L5	V
4	Male	61	L5/S1	V
5	Female	62	L4/L5	V
6	Female	55	L4/L5	IV
7	Male	48	L5/S1	IV
8	Male	53	L5/S1	V
9	Female	51	L4/L5	IV
10	Male	55	L4/L5	V

The intervertebral discs were classified acording to the Pfirrmann grade grading system for lumbar intervertebral disc degeneration.