Table V. —Construct validity (Pearson’s correlations) between the WIP questionnaire and outcome measures of catastrophizing, back disability and pain intensity.

Outcome Measures	Whole scale	Factor 1	Factor 2
PCS	-0.39**	-0.39**	-0.21*
Helplessness	-0.49**	-0.46**	-0.33**
Rumination	-0.28**	-0.30**	-0.11
Magnification	-0.25*	-0.27**	-0.09
ODI	-0.47**	-0.48**	-0.23*
NRS	-0.35**	-0.35**	-0.19

WIP: Work in Progress; Factor 1: Self-drivenness to return to normal personal life with pain; Factor 2: Self-drivenness to return to work and reduce the dependence of health services; PCS: Pain Catastrophizing Scale; ODI: Oswestry Disability Index; NRS: Numerical Rating Scale. *P<0.05; **P<0.01.