1. To develop conjoint analysis as a decision aid for patients who are candidates for knee joint replacement
2. To conduct a pilot test of the decision aid to ascertain the utilities of patients who are at low, intermediate, and high risk of complications and premature prosthetic failure
3. To undertake a RCT of the decision aid to evaluate patient participation in the decision and extend of decisional conflict at the time of the visit and 3 months later. |