Table 4 Predefined Hypothesis of Correlation and Spearman’s rho Coefficients for the PCS Total Score and Concurrent Measures (n = 90)

Moderate to high correlation

FABQ-PA

0.34**

Yes

FABQ-W

0.25*

No

HSCL-25

0.56**

Yes

Low to moderate correlation

RMDQ

0.27*

Yes

COMI

0.43**

Yes

EQ-5D

-0.36**

Yes

NRS back pain

0.31**

Yes

*p < 0.05 (two-tailed)

**p < 0.01 (two-tailed)