Table 1 Patient demographic data for the TESSYS and ZESSYS groups

Age, years

52.54 ± 9.10

49.21 ± 10.38

0.208

Sex, male:female

18:10

15:13

0.415

ASA criteria, I:II

20:8

18:10

0.571

BMI (kg/m²)

22.28 ± 2.69

21.99 ± 2.22

0.659

Smoker, yes:no

16:12

17:11

0.786

Duration of symptoms, weeks

15.21 ± 2.54

16.04 ± 2.96

0.271

Herniation type, contained:uncontained

9:19

11:17

0.577

Foraminal stenosis grade (L5–S1) 0:1:2:3

19:9:0:0

17:10:1:0

0.523

Iliac height grade

1:2:3:4:5:6

0:0:3:8:10:7

0:0:1:9:11:7

0.730