Table 3 Spearman’s coefficient (r) of convergent construct validity

SPADI

-

Pain subscale

0.931**

-

Disability subscale

0.970**

0.827**

-

OSS

−0.674**

−0.640**

−0.645**

-

Fact-B

−0.298*

−0.343**

−0.247**

0.213*

-

Fact-G

−0.208*

−0.235*

−0.179

0.114

0.871**

-

TOI

−0.404**

−0.448**

−0.340**

0.276**

0.923**

0.711**

-

NSDQ

0.432**

0.436**

0.396**

−0.469**

−0.255**

−0.191*

−0.317**

-

SF-36-physical function

−0.452**

−0.463**

−0.438**

0.364**

0.164

0.079

0.226*

−0.292**

-

SF-36-physical role

−0.392**

−0.405**

−0.364**

0.391**

0.175

0.182

0.236*

−0.285**

0.400**

-

SF-36- bodily pain

−0.385**

−0.355**

−0.377**

0.363**

0.139

0.057

0.191*

−0.087

0.310**

0.477**

-

SF-36- general health

−0.182*

−0.167

−0.202*

0.140

0.233*

0.200*

0.213*

−0.218*

0.195*

0.160

0.219*

-

SF-36-vitality

−0.146

−0.145

−0.150

0.101

0.104

0.025

0.140

−0.071

0.220*

0.213*

0.290**

0.370**

-

SF-36-social role

−0.200*

−0.181*

−0.200*

0.186*

0.126

0.117

0.174

−0.272**

0.247**

0.420**

0.439**

0.222*

0.503**

-

SF-36-emotional role

−0.315**

−0.312**

−0.301**

0.312**

0.119

0.099

0.161

−0.266**

0.220*

0.494**

0.348**

0.186*

0.394**

0.417**

-

SF-36- mental health

−0.146

−0.077

−0.177

0.051

0.049

0.054

0.102

−0.026

−0.033

0.147

0.182

0.216*

0.601**

0.511**

0.398**

-