Table 3 Comparison for postoperative VAS, ODI, and ZCQ score

VAS back

 Preop (mean score)

6.95 ± 1.51

7.00 ± 1.53

0.868

 Postop (6 h)

2.94 ± 0.74

3.36 ± 0.77

0.002^**

 Postop (1 wk)

2.82 ± 0.76

3.16 ± 0.90

0.021^*

 Follow-up at 6 mos

2.36 ± 0.83

2.34 ± 0.73

0.920

 Follow-up at 1 yrs

1.94 ± 0.69

2.11 ± 0.61

0.134

 Follow-up at 2 yrs

1.82 ± 0.60

1.93 ± 0.54

0.266

 p-value (pre vs. post)

0.000^**

0.000^**

VAS leg

 Preop (mean score)

7.13 ± 1.47

7.25 ± 1.41

0.662

 Postop (6 h)

3.34 ± 0.75

3.67 ± 0.81

0.019^*

 Postop (1 wk)

3.18 ± 0.72

3.39 ± 0.86

0.127

 Follow-up at 6 mos

2.21 ± 0.83

2.18 ± 0.72

0.835

 Follow-up at 1 yrs

1.69 ± 0.63

1.77 ± 0.53

0.420

 Follow-up at 2 yrs

1.64 ± 0.60

1.72 ± 0.52

0.413

 p value (pre vs post)

0.000^**

0.000^**

ODI

 Preop (mean score)

62.13 ± 3.51

61.13 ± 2.82

0.079

 Follow-up at 3 mos

31.62 ± 5.44

33.15 ± 4.80

0.097

 Follow-up at 6 mos

16.58 ± 2.40

16.77 ± 2.41

0.659

 Follow-up at 1 yrs

12.81 ± 1.36

12.97 ± 1.48

0.523

 Follow-up at 2 yrs

12.10 ± 0.92

12.23 ± 0.88

0.236

 p-value (pre vs. post)

0.000^**

0.000^**

ZCQ

 Preop (mean score)

66.85 ± 2.57

66.03 ± 2.31

0.062

 Postop (1 wk)

38.67 ± 3.67

39.85 ± 3.90

0.080

 Follow-up at 6 mos

22.18 ± 3.10

21.59 ± 2.72

0.258

 Follow-up at 1 yrs

19.72 ± 2.39

20.20 ± 1.97

0.219

 Follow-up at 2 yrs

18.71 ± 1.74

19.10 ± 1.77

0.220

 p-value (pre vs. post)

0.000^**

0.000^**