Table 5 Testing ODI Construct Validity

ODI-U Total Score Difference

Mean ± SD

P -Value

Patients

18.37 ± 10.18

< 0.001

Healthy

8.95 ± 5.74

Difference (SE)

9.41 ± 1.65

Pearson’s Correlation Coefficient

r

P -Value

Between ODI-U and VAS _pain

0.49

< 0.001

Between ODI-U and VAS _disability

0.51

< 0.001

Between ODI-U and SF-36 Domains

ODI-U and Physical Functioning (PF)

−0.57

<.001

ODI-U and Role Physical (RP)

−0.61

<.001

ODI-U and Bodily pain (BP)

−0.54

<.001

ODI-U and General Health (GH)

−0.43

<.001

ODI-U and Vitality (VT)

−0.59

0.12

ODI-U and Social Functioning (SF)

−0.63

<.001

ODI-U and Role Emotional (RE)

−0.55

<.001

ODI-U and Mental Health (MH)

−0.48

<.001