Introduction Several on-demand treatments are available for management of “OFF” episodes in patients with Parkinson’s disease (PD). We evaluated patients’ preferences for features of theoretical on-demand treatment options. Methods In a discrete choice experiment, US adults with self-reported PD of ≥5 years, or <5 years with “OFF” episodes, taking oral carbidopa/levodopa, selected between pairs of theoretical on-demand treatments that varied by mode of administration (with and without mode-specific adverse events [AEs]), time to FULL “ON,” duration of “ON,” and out-of-pocket cost for a 30-day supply. Data were analyzed with a random parameters logit model; results were used to calculate relative importance of treatment attributes, preference shares, and willingness to pay. Results Among 300 respondents, 98% had “OFF” episodes. Across the range of attribute levels included in the survey, avoiding $90 cost was most important to respondents, followed by a preferable mode of administration with associated AEs and decreasing time to FULL “ON.” Duration of “ON” was relatively less important. On average, respondents preferred a theoretical dissolvable sublingual film versus other theoretical treatments with alternative modes of administration. Respondents were willing to pay $28–$52 US dollars to switch from least- to more-preferred mode of administration with associated AEs, $58 to reach FULL “ON” in 15 versus 60 min, and $9 to increase duration of FULL “ON” from 1 to 2 h. Conclusion Respondents with PD valued lower out-of-pocket cost and a sublingual mode of administration with its associated AEs when choosing an on-demand treatment for “OFF” episodes.

Introduction: Despite recent advances in treatment for psoriatic arthritis (PsA), many patients experience inadequate response or intolerance to therapy, indicating that unmet treatmentrelated needs remain. To further characterize these unmet needs, we evaluated patients' experiences regarding the burden of PsA symptoms and disease impacts, and patients' preferences for treatment. Methods: Patients from ArthritisPower, a rheumatology research registry, completed a web-based survey. Object case best-worst scaling (BWS) was used to evaluate the relative burden of 11 PsA-related symptoms and the relative importance of improvement in nine PsA-related disease impacts. BWS data were analyzed using a random-parameters logit model. Patient demographics, preferences for mode and frequency of therapy, and preferences for methotrexate were analyzed descriptively. Results: Among the 332 participants, most were White (94%), female (80%), with mean age of 54 years (SD 11.4). In the BWS, joint pain was the most bothersome symptom, followed by other musculoskeletal pain and fatigue. The BWS for disease impacts found that improvements in the ability to perform physical activities were most important, followed by improvements in the ability to function

Objectives Low optimism and low numeracy are associated with difficulty or lack of participation in making treatment-related health care decisions. We investigated whether low optimism and low self-reported numeracy scores could help uncover evidence of decisional conflict in a discrete-choice experiment (DCE). Methods Preferences for a treatment to delay type 1 diabetes were elicited using a DCE among 1501 parents in the United States. Respondents chose between two hypothetical treatments or they could choose no treatment (opt out) in a series of choice questions. The survey included a measure of optimism and a measure of subjective numeracy. We used latent class analyses where membership probability was predicted by optimism and numeracy scores. Results Respondents with lower optimism scores had a higher probability of membership in a class with disordered preferences ( P value for optimism coefficient = 0.032). Those with lower self-reported numeracy scores were more likely to be in a class with a strong preference for opting out and disordered preferences ( P = 0.000) or a class with a preference for opting out and avoiding serious treatment-related risks ( P = 0.015). Conclusions If respondents with lower optimism and numeracy scores are more likely to choose to opt out or have disordered preferences in a DCE, it may indicate that they have difficulty completing choice tasks.

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