Table 1 Baseline characteristics

Number of patients

63

Male patients, number (%)

36(57.1)

34 (52.3)

0.771

Age, years

52.3 ± 4.3

53.0 ± 4.4

0.580

BMI, kg/m²

24.1 ± 2.0

24.4 ± 2.3

0.632

Symptom duration, months

4.9 ± 8.5

4.5 ± 9.1

0.876

Surgical time, minutes

184 ± 22

179 ± 22

0.435

Intraoperative blood loss

127 ± 35

121 ± 38

0.572

 L3–L4, n

2

3

0.149

 L4–L5, n

28

32

 L5–S1, n

33

30