Table 3.

Pearson's product-moment correlation coefficient between the Brief Pain Inventory pain (BPI) severity index and function interference index with subscales of the WOMAC and the SF-36 questionnaires for patients with OA of the hip at baseline (N = 161)

	Pain Severity Index	Function Interference Index
WOMAC
Pain	0.66**	0.57**
Stiffness	0.26**	0.33**
Physical function	0.57**	0.63**
SF-36 Scale
Physical functioning	-0.38**	-0.51*'
Role-physical	-0.22**	-0.32**
Bodily pain	-0.58**	-0.65**
General health	-0.27**	-0.37**
Vitality	-0.39**	-0.57**
Social functioning	-0.45**	-0.63**
Role-emotional	-0.19*	-0.40**
Mental health	-0.41**	-0.67**

**correlation is significant at the 0.01 level

* correlation is significant at the 0.05 level

Hypothesized moderate to high correlations are boldfaced