Table 2 Comparison of NRS and ODI scores in the control group and silver needle group (mean ± SD)

NRS score (reduction rate)

Baseline

8.02 ± 0.80

7.90 ± 0.91

0.484

2 weeks

3.60 ± 0.93 (54% ± 12%)

3.52 ± 1.13 (55% ± 15%)

0.699

1 month

5.22 ± 2.22 (35% ± 28%)

1.64 ± 0.78 (79% ± 11%)

< 0.001

2 months

3.10 ± 1.41 (61% ± 18%)

1.62 ± 0.95 (79% ± 12%)

< 0.001

3 months

2.19 ± 0.71 (73% ± 10%)

1.33 ± 0.63 (83% ± 9%)

< 0.001

6 months

2.00 ± 0.68 (75% ± 11%)

1.22 ± 0.66 (84% ± 9%)

< 0.001

ODI score

Baseline

64.7 ± 2.8

65.6 ± 2.7

0.147

2 week

39.4 ± 3.2

39.8 ± 3.3

0.584

1 month

44.5 ± 16.7

27.2 ± 3.4

< 0.001

2 months

30.3 ± 8.6

24.3 ± 2.2

< 0.001

3 months

24.6 ± 2.1

24.6 ± 3.0

0.901

6 months

25.1 ± 2.4

24.8 ± 3.0

0.709