Table 1.

Summary of demographic data included in this study

Patients NO.	Age	Gender	Level	Degree*
Degenerate group
1	32	M	L45	V
2	23	M	L45	IV
3	41	M	L45	V
4	33	F	L45	IV
5	34	M	L45	V
6	28	F	L5S1	IV
7	29	F	L5S1	IV
8	24	M	L45	IV
9	46	M	L45	IV
10	26	F	L5S1	V
11	28	M	L45	IV
12	42	F	L5S1	IV
Normal group
13	42	M	L45	I
14	25	M	L45	I
15	33	F	L45	I
16	27	M	L45	I
17	40	M	L45	I
18	39	F	L45	I
19	21	M	L45	I
20	26	M	L45	I

^*Pfirrmann’s grading system.