Table 3 Treatment effect of nonobese patients compared with obese patients for outcome measures

Oswestry Disability Index(ODI)

Pre-operation

67.16 ± 9.25

68.10 ± 9.27

p > 0.05

24 months post-operation

12.01 ± 3.57

13.92 ± 4.24

P = 0.078

VAS-Back

Pre-operation

6.65 ± 1.57

6.59 ± 1.45

p > 0.05

Immediately post-operation

0.50 ± 0.58

0.79 ± 0.86

p > 0.05

6 months post-operation

0.31 ± 0.54

0.12 ± 0.33

p > 0.05

12 months post-operation

0.28 ± 0.45

0.12 ± 0.33

P = 0.143

24 months post-operation

0.23 ± 0.41

0.10 ± 0.30

P = 0.156

VAS-Leg

Pre-operation

8.38 ± 0.94

8.38 ± 0.86

P = 0.983

Immediately post-operation

1.08 ± 0.93

1.03 ± 0.91

P = 0.865

6 months post-operation

0.12 ± 0.43

0.24 ± 0.58

P = 0.368

12 months post-operation

0.11 ± 0.45

0.23 ± 0.56

P = 0.324

24 months post-operation

0.10 ± 0.48

0.22 ± 0.56

P = 0.378