Table 2.

Cronbach’s Alpha Values of Health Status Measures

Measures	Cronbach’s Alpha*
	Pre-Operative	Follow-Up
WOMAC Pain	0.79	0.83
WOMAC Stiffness	0.76	0.83
WOMAC Function	0.95	0.87
SF-36 Mental Health	0.75	0.84
SF-36 Physical Function	0.84	0.87

^*The generally accepted threshold for acceptable internal consistency is a Cronbach’s alpha value of 0.7.