Table 3 NDI validity study

VAS Pain

61.5 ± 25

0.60*

VAS Disability

51.2 ± 29

0.76**

HAD depression

7.3 ± 4.2

0.62*

HAD Anxiety

9.7 ± 4.5

0.58*

SF-36

Physical functioning

62.5 ± 24.3

0.68*

Role Physical

31.2 ± 24.3

0.29

Bodily Pain

39.4 ± 21.5

0.42^ϕ

General health

48.1 ± 18.9

0.55*

vitality

49.2 ± 23.1

0.57*

Social functioning

60.2 ± 18.2

0.64*

Role Emotional

37.1 ± 19.9

0.36^ϕ

Mental health

57.2 ± 21.2

0.60*