Understanding Patient Preferences in Proximal Interphalangeal Joint Surgery for Osteoarthritis: A Conjoint Analysis.

PURPOSE: We sought to compare preferences for arthroplasty versus arthrodesis among patients with proximal interphalangeal (PIP) joint osteoarthritis (OA) by quantifying the patient-assigned utility of each operation's attributes.

METHODS: We undertook a multistep process to identify relevant surgical attributes, including a literature review, surgeon survey, and pretest patient pilot test to build a set of discrete choice experiments. Patients with PIP joint osteoarthritis were identified using a single university electronic medical record and were recruited via electronic message or postcard. Participants completed a demographic survey and 11 discrete choice experiments designed using Sawtooth Software's Discover tool. Utility and importance scores were generated for each attribute.

RESULTS: Pretest analysis identified out-of-pocket cost, joint stiffness, need for future surgery, change in grip strength, and total recovery time as the most important surgical attributes. Initial response rate to the conjoint survey was 75% and survey completion rate was 61%. The study sample was predominantly white (91%) and female (72%), mean age 64.3 years (range, 34-90 years), and mean daily pain score was 4.32 (range, 0-10). Attribute importance scores demonstrated that joint stiffness (32%) and grip strength (29%) were most important to patients. Cost (17%) and need for future surgery (19%) were intermediate patient-preference drivers. Recovery time was the least important attribute (2%).

CONCLUSIONS: In aggregate, patients prefer surgical attributes characteristic of arthroplasty (ability to preserve joint motion and grip strength) relative to those associated with arthrodesis (decreased need for reoperation, lower costs, and shorter reoperation times).

TYPE OF STUDY/LEVEL OF EVIDENCE: Economic/Decision Analysis III.