Patient Preferences Associated with Therapies for Psoriatic Arthritis: A Conjoint Analysis.

Background: As psoriatic arthritis (PsA) treatment choices continue to expand, it is important to consider patient preferences for treatment modalities for PsA. Involving patients in treatment decisions can influence adherence to treatment and outcomes of therapy.

Objective: To determine patient preferences for medication attributes prescribed for patients with PsA.

Methods: A choice-based conjoint survey was mailed to 2800 randomly selected patients with PsA who were enrolled in Humana Medicare and commercial plans. Patients had been diagnosed with PsA between January 1, 2012, and September 30, 2016. The medication attributes included in the survey were the medication route of administration, frequency of administration, ability to reduce daily joint pain and swelling, likelihood of serious infections, improvement in the patient's ability to perform daily activities, achieving clear or almost clear skin, and cost. Hierarchical Bayesian models were used to score patient preferences after adjusting for demographic and clinical characteristics. The mean attribute importance scores were used to rank patient preferences.

Results: A total of 468 patients (258 with a Medicare plan and 210 with a commercial plan) completed the survey. The top 3 medication attributes for patients in Medicare plans were route of administration, cost, and improvement in the ability to perform daily activities. For patients in commercial plans, the top 3 medication attributes were cost, route of administration, and frequency of administration. Within the top 2 attributes for patients in both plans, the oral route of administration and lower cost were most preferred.

Conclusion: Medication route of administration and cost were the 2 most important considerations for patients diagnosed with PsA who were enrolled in Medicare or commercial plans with Humana. As PsA treatment choices continue to expand, considering patient preferences may improve patient adherence and treatment outcomes and should be considered when making treatment decisions for this patient population.