Surgery

Injection

p

Age, mean ± SD years

50.52 ± 10.87

53.17 ± 13.93

0.213

Duration of symptoms, mean ± SD weeks

31.12 ± 7.27

33.25 ± 8.17

0.723

VAS nocturnal paraesthesias, mean ± SD mm

55.63 ± 29.44

58.13 ± 28.90

0.584

VAS local pain, mean ± SD mm

42.69 ± 30.57

42.40 ± 29.36

0.951

VAS functional impairment, mean ± SD mm

39.03 ± 28.06

37.90 ± 26.36

0.793