Table 2 Meta analysis of reoperation rate

Reoperation rate

37

0.10 (0.08–0.12)

99.3

 Sensitivity analysis

0.10 (0.08–0.12)

 Publication bias

Z = 2.91

P = 0.004

Study design

 Prospective cohort

12

0.10 (0.07–0.13)

94.5

 Retrospective cohort

25

0.10 (0.08–0.13)

99.5

Patients

 DLS

27

0.11 (0.08–0.13)

99.4

 DLS with LSS

10

0.10 (0.06–0.13)

96.5

Surgery types

 Decompression

21

0.11 (0.09–0.13)

91.9

 Fusion

8

0.10 (0.07–0.12)

98.9

 Decompression and fusion

6

0.09 (0.05–0.13)

99.0

 Others

2

0.07 (0.03–0.11)

23.4

Follow-up (years)

  < 5

20

0.09 (0.06–0.12)

98.5

 5–10

13

0.12 (0.09–0.14)

98.1

  ≥ 10

3

0.10 (0.06–0.15)

92.8

Quality

 Fair

26

0.11 (0.09–0.13)

98.6

 High

11

0.07 (0.05–0.10)

96.7