Table 2 Pearson’s correlations after item weighting

Functional limitation

Physical pain

Psychological discomfort

Disability

Mean

Median

SD

Score range

Functional limitation

–

–

–

–

5.93

6

3.04

0–12

Physical pain

0.812***

–

–

–

6.54

6

3.91

0–16

Psychological discomfort

0.694***

0.812***

–

–

3.21

3

2.26

0–32

Disability

0.545***

0.676***

0.736***

–

7.47

7

5.97

0–8

Handicap

0.438***

0.544***

0.589***

0.756***

1.72

2

1.86

0–8