Table 1.

Inclusion and exclusion criteria for the North American Knee Arthroplasty Revision Study Prospective Cohort Study

Inclusion criteria	Exclusion criteria
At minimum, tibial and/or the femoral component requiring reconstruction	Requiring polyethylene exchange only or failed unicondylar prosthesis
Signed informed consent obtainable	Informed consent not obtained
Failure of a primary TKA	Previous revision surgery to affected knee
Age older than 18 years	Metastatic or primary tumor of knee
Intact cognition	Reflex sympathetic dystrophy of leg
Fluent communication in English	Medically unfit to tolerate surgery
Capacity to complete self-administered questionnaire	Progressive muscular condition with quadriceps weakness
Ability adhering to the study protocol	Neurologic deficit of affected limb
	Knee pain associated with spinal pathology