Eliciting preferences to inform patient-centred policies: the case of psoriasis

Ixekizumab Demonstrates Rapid and Consistent Efficacy for Patients with Psoriatic Arthritis, Regardless of Psoriasis Severity

INTRODUCTION

Skin involvement in patients with psoriatic arthritis (PsA) worsens the severity and burden of disease. Ixekizumab (IXE), a selective interleukin (IL)-17A antagonist, was compared to placebo (PBO) in the SPIRIT-P1 (NCT01695239) and SPIRIT-P2 (NCT02349295) studies in patients with PsA and evidence of plaque psoriasis. This post hoc analysis reports musculoskeletal, skin, and nail outcomes through week 24 in patients from SPIRIT-P1 and SPIRIT-P2, stratified by mild, moderate, or psoriasis at baseline.

METHODS

This post hoc analysis pooled patients from SPIRIT-P1 and SPIRIT-P2 who were randomly assigned to PBO or IXE 80 mg every 4 weeks (Q4W) or every 2 weeks (Q2W). Efficacy outcomes were analyzed through week 24 by baseline psoriasis severity, defined by percent body surface area (BSA) affected; mild = BSA < 3%, moderate = 3% ≤ BSA ≤ 10%, severe = BSA > 10%. The primary outcomes assessed were the proportion of patients achieving American College of Rheumatology (ACR)20, ACR50, and ACR70 responses. Secondary outcomes included musculoskeletal, disease activity, skin and nail, and health-related quality-of-life measures.

RESULTS

Similar proportions of patients achieved ACR20/ACR50/ACR70 over time across all severity subgroups and treatment arms. More than one-third of IXE-treated patients achieved ACR20 at week 4, or ACR50 at week 24, with no significant differences according to psoriasis severity at baseline. Disease activity outcomes were similar through week 24 with both IXEQ4W and IXEQ2W, regardless of psoriasis severity at baseline. There were no significant differences over 24 weeks in the proportions of IXE-treated patients with mild, moderate, or severe baseline psoriasis who achieved Minimal Disease Activity (MDA). Across all severity subgroups, IXE demonstrated Psoriasis Area Severity Index 100 response as early as week 4, and approximately one-third of IXE-treated patients achieved total skin clearance at week 24.

CONCLUSION

IXE demonstrated rapid and consistent efficacy in joint, skin, and nail for patients with PsA, regardless of baseline psoriasis severity.

TRIAL REGISTRATION

SPIRIT-P1 (NCT01695239), SPIRIT-P2 (NCT02349295).

Comparing Achievement of National Psoriasis Foundation Treatment Targets among Patients with Plaque Psoriasis Treated with Ixekizumab versus Other Biologics in Clinical and Real-World Studies

INTRODUCTION

The National Psoriasis Foundation (NPF) recommends evaluating patient response to treatment at week 12, with a target response of ≤ 1% body surface area (BSA) affected by plaque psoriasis and an acceptable response of BSA ≤ 3% or ≥ 75% improvement. This post hoc analysis compared the achievement of NPF target and acceptable responses for ixekizumab (IXE) versus other biologics.

METHODS

Outcomes were evaluated at week 12 for patients with moderate-to-severe plaque psoriasis from four head-to-head randomized clinical trials (RCTs; UNCOVER-2, UNCOVER-3, IXORA-R, and IXORA-S) and one real-world prospective observational study (Psoriasis Study of Health Outcomes; PSoHO). RCT patients were treated with IXE or etanercept (ETN; UNCOVER-2/3), guselkumab (GUS; IXORA-R), or ustekinumab (UST; IXORA-S). PSoHO patients were treated with anti-interleukin (IL)-17A biologics (IXE, secukinumab, SEC) and other approved biologics for the treatment of plaque psoriasis. Patients with missing outcomes were imputed as non-responder imputation. For RCT data, statistical comparisons between treatment groups were performed using Fisher's exact test with no multiplicity adjustments. For real-world data, adjusted comparative analyses were performed using frequentist model averaging (FMA) and reported as odds ratio (OR).

RESULTS

Across the four head-to-head clinical trials analyzed, significantly higher proportions of patients achieved target and acceptable responses at week 12 with IXE versus ETN, GUS, or UST. Likewise, the proportion of PSoHO patients achieving target and acceptable response at week 12 was higher with IXE compared with other individual biologics. Adjusted comparative analyses showed that IXE had significantly greater odds of target and acceptable response at week 12 versus SEC, GUS, risankizumab (RIS), adalimumab (ADA), UST, and tildrakizumab (TILD) and numerically greater odds of target and acceptable response at week 12 versus brodalumab (BROD).

CONCLUSION

Across both clinical studies and real-world settings, more patients treated with IXE achieved NPF target and acceptable responses at week 12 compared with those treated with other biologics.

TRIAL REGISTRATION

UNCOVER-2 (NCT01597245); UNCOVER-3 (NCT01646177); IXORA-R (NCT03573323); IXORA-S (NCT02561806); PSoHO (EUPAS24207).

Speed of clinical improvement in the real-world setting from patient-reported Psoriasis Symptoms and Signs Diary: Secondary outcomes from the Psoriasis Study of Health Outcomes through 12 weeks

BACKGROUND

Rapid skin improvement is a key treatment goal of patients with moderate-to-severe psoriasis (PsO).

OBJECTIVES

To compare the speed of clinical improvement of approved biologics on the symptoms and signs of psoriasis assessed by patients using the validated Psoriasis Symptoms and Signs Diary (PSSD) through 12 weeks.

METHODS

Psoriasis Study of Health Outcomes (PSoHO) is an international, prospective, non-interventional study that compares the effectiveness of anti-interleukin (IL)-17A biologics versus other biologics, together with pairwise comparisons of ixekizumab versus five individual biologics in patients with PsO. Using the PSSD 7-day recall period, patients assessed the symptoms (itch, skin tightness, burning, stinging and pain) and signs (dryness, cracking, scaling, shedding/flaking, redness and bleeding) of their psoriasis (0-10). Symptom and sign summary scores (0-100) are derived from the average of individual scores. Percentage change in summary scores and proportion of patients with clinically meaningful improvements (CMI) in PSSD summary and individual scores are evaluated weekly. Longitudinal PSSD data are reported as observed with treatment comparisons analysed using mixed model for repeated measures (MMRM) and generalized linear mixed models (GLMM).

RESULTS

Across cohorts and treatments, eligible patients (n = 1654) had comparable baseline PSSD scores. From Week 1, the anti-IL-17A cohort achieved significantly larger score improvements in PSSD summary scores and a higher proportion of patients showed CMIs compared to the other biologics cohort through 12 weeks. Lower PSSD scores were associated with a greater proportion of patients reporting their psoriasis as no longer impacting their quality-of-life (DLQI 0,1) and a high level of clinical response (PASI100). Results also indicate a relationship between an early CMI in PSSD score at Week 2 and PASI100 score at Week 12.

CONCLUSIONS

Treatment with anti-IL-17A biologics, particularly ixekizumab, resulted in rapid and sustained patient-reported improvements in psoriasis symptoms and signs compared with other biologics in a real-world setting.

Treatment Preferences in Young Adults with Moderate to Severe Psoriasis: A Qualitative Study from the Nordic Countries

INTRODUCTION

The purpose of this study is to explore treatment preferences and identify patient characteristics in young bio-naive adults with moderate to severe psoriasis in the Nordic countries (Norway, Finland, Sweden, and Denmark).

METHODS

Patients were 18-45 years old and bio-naive but referred for biologic treatment of moderate to severe psoriasis. Patients were included at eight Nordic dermatology clinics. Patients with significant comorbidity or psoriatic arthritis were excluded. The Psoriasis Area and Severity Index (PASI) and Dermatology Life Quality Index (DLQI) were assessed along with basic patient information. A semistructured interview guide was used in individual qualitative interviews, asking patients about their treatment preferences and reasons, disease journey, and disease management. The interviews were analyzed using thematic content analysis. Twenty-four patients sufficed to reach saturation in this qualitative study.

RESULTS

The patient sample characteristics represented a qualitative variation in age, sex, symptoms, duration of disease, and country. We included a total of 12 male and 12 female patients. The mean age was 34 years (range 18-45 years), the mean age at diagnosis was 20 years (range 6-34 years), the mean ± standard deviation (SD) time since diagnosis was 13 ± 8 years, PASI was 9.5 ± 4.7, and DLQI was 15.2 ± 6.4. Interviews suggested that both the burden of disease as well as the burden of treatment influenced patient preferences regarding treatment attributes, hence getting alleviation from symptoms did not alone influence patient preferences. Time, effort, and inconvenience related to psoriasis treatments also influenced patient preferences.

CONCLUSIONS

This first in-depth, qualitative study in young bio-naive adults with psoriasis suggests that patient preferences are focusing not only on symptom relief but also on alleviating the burden of psoriasis treatment. Understanding the reasons for patient preferences and the perspectives of young adults is needed to guide individual shared decision-making in psoriasis management.

Blocking interleukin-17 in psoriasis: Real-world experience from the PsoPlus cohort

BACKGROUND

Real-world studies on the use of biologics in psoriasis (Pso) are increasing, but still scarce. Trough concentrations (C_t s) of interleukin-17 inhibitors (IL-17i) seem promising for clinical decision-making, but their value in daily practice has yet to be proven.

OBJECTIVES

To report on IL-17i effectiveness, treatment modifications and C_t use in our clinic.

METHODS

Data were collected from IL-17i-treated Pso patients followed up in the PsoPlus clinic at the Dermatology department, Ghent University Hospital, Belgium. Descriptive statistics and Kaplan-Meier analysis were performed.

RESULTS

A total of 111 patients were included, counting for 134 IL-17i courses (secukinumab, ixekizumab, and brodalumab). Fifty-five per cent of the patients were bio-naive prior to IL-17i initiation. During maintenance, merely 97.0% and 77% achieved near-complete and complete skin clearance, respectively. Major reasons for treatment modification were suboptimal response (63.0%) and safety issues (9.3%). Reported modifications were switch (25.4%), dose escalation (11.9%), dose de-escalation (6.7%), treatment association (6.0%) and IL-17i stop (3.0%). Overall drug survival was 69.0 months, without difference between the different IL-17i (p = 0.078). Ixekizumab tended to have the highest survival. Drug survival was higher in bio-naive subjects compared to bio-experienced subjects (p = 0.011). C_t was measured in 20 patients and interpreted post hoc. In 85%, the clinical decision was in accordance with the C_t (e.g. substantiated need for dose escalation). For the other cases, the C_t would have led to another clinical decision if known at that time.

CONCLUSIONS

This real-world study showed that IL-17i are very effective drugs for Pso, with ixekizumab as leading biologic. Prior bio-experience seemed to impact IL-17i drug survival. Treatment modifications were mainly performed in case of insufficient response, primarily via switch and dose escalation, and least frequently in ixekizumab patients. C_t might rationalize clinical decision-making; however, there is need for standardized algorithms to corroborate its use.

Patient Preference for Biologic Treatments of Psoriasis in the Chinese Setting

OBJECTIVE

Assessments of patients' preferences can support in clinical decision-making regarding biologic therapies for psoriasis. Our objective was to investigate patient preference for biologic treatments in patients with psoriasis in China.

METHODS

From October 2020 to January 2021, psoriasis patients were recruited for a survey that included demographic and disease-related questions, as well as a discrete choice experiment to measure their preferences for biologic therapy. A discrete-choice experiment was used in which respondents selected psoriasis treatments based on benefits (ie, early onset of efficacy, long-term efficacy, sustained efficacy) and treatment costs. We analyzed choice data using conditional logit model.

RESULTS

This study included 236 patients with moderate-to-severe psoriasis. The relative importance of the cost of biologic treatments, probability of keeping PASI100 at 5 years, probability of achieving PASI100 at 3 months and time to achieve PASI50 after initiation the biologic treatment were 0.593, 0.137, 0.185 and 0.085. Over 50% of patients regarded the cost of biologic treatments as the most important attribute. High-income and low-income subgroups had higher preference weight in probability of achieving PASI100 at 3-month and monthly cost.

CONCLUSION

The cost of biologic treatments was found as the most important attribute for Chinese patients with psoriasis. Among efficacy attributes, the probability of achieving PASI100 at 3 months showed most sensitive. These results may be helpful to understand patient preference for biologic treatments used for psoriasis in China.

Impact of clinical and demographic characteristics on patient preferences for psoriasis treatment features: Results from a discrete-choice experiment in a multicountry study

OBJECTIVES

This study aimed to elicit preferences for psoriasis treatment features and to test for preference heterogeneity across groups of respondents.

MATERIALS AND METHODS

A discrete-choice experiment was employed to elicit preferences of patients with plaque psoriasis in multiple countries. The survey instrument included a series of choice questions between three hypothetical treatments, each characterized by varying levels of six attributes (namely, lesion reduction, risk of impairing side effects, time to reach results, mode and frequency of administration, itching reduction, and side effects). Random parameters logit was used to model the data. Results were compared across a total of 18 subgroup sets.

RESULTS

The data analysis from 1,123 respondents showed that, on average, respondents receive more utility gain from higher levels of lesion reduction and lower risks of impairing side effects than changes in other attributes included in the study. Systematic differences were detected for 13 sets; the most pronounced differences were observed based on disease severity, nail psoriasis, biologic experience, and quality-of-life scores.

CONCLUSION

These many sources of preference heterogeneity identified by our analysis suggest that to improve patient satisfaction and, probably, adherence and persistence, clinicians should discuss options with patients when prescribing their treatment.

The importance of understanding patient and physician preferences for psoriasis treatment characteristics: a systematic review of discrete-choice experiments

Introduction: Treatment adherence continues to be a major challenge in psoriasis. Patient preference studies, especially discrete-choice experiments, are gaining popularity to gather insights into patient reported treatment outcomes. This systematic literature review aimed to critically assess all discrete choice experiments exploring patients' and physicians' preferences for psoriasis treatment characteristics.Methods: PubMed and EMBASE databases were searched using keywords "psoriasis" and "preferences" to identify relevant literature. Discrete-choice experiments conducted in French or English from the year 2000 onwards, that focused on evaluating psoriasis treatment preferences in patients and/or physicians, were included. The relative importance of treatment attributes was assessed and studies were critically appraised using validated checklists.Results: Out of 987 articles identified, 25 articles fulfilled the inclusion criteria. Overall, patients and physicians prioritize efficacy-specific outcomes. Patients are shown to place greater importance to process attributes when compared to physicians, especially route and location of administration. Physicians focus primarily of efficacy attributes, however when the top two attributes are considered, safety outcomes increasingly become considered important. Of the studies, 60% conducted subgroup analysis, of which many reported associations between specific patient characteristics and preferences. Factors such as age, disease severity, and duration of condition significantly affected preferences for treatment attributes.Conclusions: This review provides insight into the types of attributes that patients and physicians value most, and therefore can help improve shared decision-making. The findings of this study also encourage regulatory agencies to continue integrating patient preferences in their decision-making.

Quality of life and patient preferences among Danish patients with ulcerative colitis - results from a survey study

Objective: To explore health-related quality of life (HRQoL) and assess preferences for medical treatment attributes to obtain information of the relative importance of the different attributes in a Danish population with ulcerative colitis (UC).Methods: We used data from an online survey collected in March 2018 among people with self-reported UC. A total of 302 eligible respondents answered the HRQoL questionnaires (EuroQol-5 Dimensions (EQ-5D-5L) and the Short Inflammatory Bowel Disease Questionnaire (SIBDQ)), and 212 also completed the discrete choice experiment (DCE). The probability of choosing an alternative from a number of choices in the DCE was estimated using a conditional logit model.Results: The respondents had an average SIBDQ score of 4.5 and an HRQoL score of 0.77, applying the EQ-5D-5L questionnaire. HRQoL correlated with disease severity, and the respondents had lower HRQoL than did a gender- and age-matched subset of the Danish population. The most important medical treatment attribute was efficacy within eight weeks. Additionally, respondents stated a preference for avoiding taking steroids, for fast onset of effect and for oral formulations.Conclusions: HRQoL correlates with disease severity, and patients with UC have lower HRQoL than the general population. The most important treatment attribute was efficacy, but patients also would like to avoid steroids, value fast onset of effect and prefer oral formulations.

Efficacy and Safety of Ixekizumab Through 5 Years in Moderate-to-Severe Psoriasis: Long-Term Results from the UNCOVER-1 and UNCOVER-2 Phase-3 Randomized Controlled Trials

Introduction

Ixekizumab, a high-affinity monoclonal antibody that selectively targets interleukin-17A, is approved for treatment of moderate-to-severe plaque psoriasis. Our objective was to evaluate the long-term efficacy and safety of ixekizumab in moderate-to-severe plaque psoriasis through 5 years.

Methods

Data were integrated from the UNCOVER-1 and UNCOVER-2, randomized, double-blinded, phase-3 trials. Patients who continuously received the labeled ixekizumab dose, were static Physician’s Global Assessment (sPGA) (0,1) responders at Week 12 and completed 60 weeks of treatment could enter the long-term extension (LTE) period. Patients could escalate to every-2-week dosing per investigator opinion. Efficacy and health outcomes included proportion of patients achieving Psoriasis Area and Severity Index (PASI) 75/90/100, sPGA (0,1) and (0), absolute PASI ≤ 5/ ≤ 3/ ≤ 2/ ≤ 1 and Dermatology Life Quality Index (DLQI) (0,1). Results exclude patients who escalated to every-2-week dosing. A modified non-responder imputation method was used to account for missing data. Supplemental analyses include patients who escalated to every-2-week dosing and observed and multiple imputation results. Exposure-adjusted safety outcomes are also reported.

Results

Of 206 patients who entered the LTE periods, 172 completed treatment. At Week 60, PASI 75/90/100 responses were 94.7%, 85.0% and 62.1%, respectively, and at year 5 were 90.3%, 71.3% and 46.3%, respectively. Similarly, meaningful responses were achieved for the other efficacy and health measures. Among patients with PASI 100 through 5 years, 92% achieved DLQI (0,1), indicating no impact of skin disease on quality of life. During the LTE period, exposure-adjusted incidence rates were 31.4 per 100 patient-years for treatment-emergent adverse events and 6.8 per 100 patient-years for serious adverse events. No deaths were reported. No new or unexpected safety findings were noted.

Conclusions

The results demonstrate 80 mg ixekizumab maintains long-term efficacy and a safety profile consistent with previous data in patients with moderate-to-severe plaque psoriasis through 5 years of treatment.

Trial Registration

ClinicalTrials.gov identifier, UNCOVER-1: NCT01474512, UNCOVER-2: NCT01597245.

Electronic Supplementary Material

The online version of this article (10.1007/s13555-020-00367-x) contains supplementary material, which is available to authorized users.

Rapid Response of Biologic Treatments of Moderate-to-Severe Plaque Psoriasis: A Comprehensive Investigation Using Bayesian and Frequentist Network Meta-analyses

INTRODUCTION

Rapid improvement of psoriasis is valued by patients and should be considered to be an important factor in treatment selection. We investigated Psoriasis Area and Severity Index (PASI) and Dermatology Life Quality Index (DLQI) response rates within the first 12 weeks of treatment to compare the rapid response of 11 biologic therapies for moderate-to-severe psoriasis using Bayesian and Frequentist network meta-analyses (NMA).

METHODS

A systematic literature review was conducted to identify phase 3, double-blind, randomized, controlled trials for adult patients with moderate-to-severe psoriasis treated with interleukin (IL)-17 (brodalumab, ixekizumab, secukinumab), IL-12/-23 (ustekinumab), IL-23 (guselkumab, risankizumab, tildrakizumab), or tumor necrosis factor inhibitors (adalimumab, certolizumab pegol, etanercept, infliximab). Outcome measures extracted from 32 publications were ≥ 75, ≥ 90, or 100% improvement in PASI score (PASI  75, PASI 90, or PASI 100, respectively) at weeks 2, 4, 8, and 12 and DLQI    (0,1), where score (0,1) indicates no effect on patient's life, at week 12. Bayesian NMA (BNMA) used fixed-treatment effect and random-baseline effect, normal independent models. Frequentist NMA (fNMA) was conducted as sensitivity analyses to test the robustness of the findings.

RESULTS

Based on BNMA and fNMA, brodalumab and ixekizumab showed the most rapid treatment effects on PASI 75 at weeks 2, 4, and 8 and on PASI 90 and PASI 100 at weeks 2, 4, 8, and 12; ixekizumab overlapped with risankizumab on PASI 75 at week 12. Brodalumab, ixekizumab, and secukinumab yielded higher DLQI (0,1) gains at week 12 compared to all of the other biologics studied. Additional measures of quality of life were not assessed in this report.

CONCLUSIONS

Ixekizumab and brodalumab provide the most rapid response and earliest clinical benefit at week 2 among all of the biologics studied, including other biologic treatments such as secukinumab, ustekinumab, guselkumab, adalimumab, and etanercept. BNMA and fNMA results showed similar relative effect estimates and treatment rankings.

FUNDING

Eli Lilly and Company.

Treatment adherence and persistence of five commonly prescribed medications for moderate to severe psoriasis in a U.S. commercially insured population

OBJECTIVE

To evaluate medication discontinuation, persistence, and adherence of moderate to severe psoriasis patients treated with adalimumab, apremilast, etanercept, secukinumab, and ustekinumab.

METHODS

Adult patients diagnosed with psoriasis and ≥1 psoriasis pharmacy or medical claim of any of the five psoriasis medications (index date) and continuous insurance enrollment were included from the Optum Clinformatics database during the intake period (7/1/2014-9/30/2017). Medication discontinuation, persistence, medication possession ratio (MPR), and proportion of days covered (PDC) were evaluated during a 12-month post-index follow-up period, using three gap definitions.

RESULTS

Among the study population (n = 8524), 34.4% initiated adalimumab, 25.7% apremilast, 9.0% etanercept, 7.1% secukinumab, and 23.7% ustekinumab. Mean age ranged from 48.7 to 52.2 years. For all three gap definitions, discontinuation was lowest and persistence greatest among ustekinumab treated patients (48.4% and 59.8%, respectively using the default definition). A greater proportion of ustekinumab patients had an MPR ≥80% (81.8%) than adalimumab (67.9%), apremilast (54.9%), etanercept (56.4%), and secukinumab (68.0%) patients. Also, 50.6% of ustekinumab patients had a PDC ≥80% versus 35.6%, 23.9%, 19.5%, and 41.7% of adalimumab, apremilast, etanercept, and secukinumab patients, respectively.

CONCLUSIONS

Although heterogeneity across cohorts may explain some medication utilization differences, ustekinumab was associated with lower discontinuation and greater persistence and adherence.

Discrete Choice Experiments in Health Economics: Past, Present and Future

OBJECTIVES

Discrete choice experiments (DCEs) are increasingly advocated as a way to quantify preferences for health. However, increasing support does not necessarily result in increasing quality. Although specific reviews have been conducted in certain contexts, there exists no recent description of the general state of the science of health-related DCEs. The aim of this paper was to update prior reviews (1990-2012), to identify all health-related DCEs and to provide a description of trends, current practice and future challenges.

METHODS

A systematic literature review was conducted to identify health-related empirical DCEs published between 2013 and 2017. The search strategy and data extraction replicated prior reviews to allow the reporting of trends, although additional extraction fields were incorporated.

RESULTS

Of the 7877 abstracts generated, 301 studies met the inclusion criteria and underwent data extraction. In general, the total number of DCEs per year continued to increase, with broader areas of application and increased geographic scope. Studies reported using more sophisticated designs (e.g. D-efficient) with associated software (e.g. Ngene). The trend towards using more sophisticated econometric models also continued. However, many studies presented sophisticated methods with insufficient detail. Qualitative research methods continued to be a popular approach for identifying attributes and levels.

CONCLUSIONS

The use of empirical DCEs in health economics continues to grow. However, inadequate reporting of methodological details inhibits quality assessment. This may reduce decision-makers' confidence in results and their ability to act on the findings. How and when to integrate health-related DCE outcomes into decision-making remains an important area for future research.

Valuing Meta-Health Effects for Use in Economic Evaluations to Inform Reimbursement Decisions: A Review of the Evidence

OBJECTIVE

This review explores the evidence from the literature regarding how meta-health effects (effects other than health resulting from the consumption of health care) are valued for use in economic evaluations.

METHODS

A systematic review of the published literature (the EMBASE, MEDLINE, PsycINFO, CINAHL, EconLit and SocINDEX databases were searched for publications in March 2016, plus manual searching) investigated the associations between study methods and the resulting values for meta-health effects estimated for use in economic evaluations. The review considered which meta-health effects were being valued and how this differed by evaluation approach, intervention investigated, source of funds and year of publication. Detailed reasons for differences observed between values for comparable meta-health effects were explored, accounting for the method of valuation.

RESULTS

The search of the literature revealed 71 studies of interest; 35% involved drug interventions, with convenience, information and process of care the three meta-health effects most often investigated. Key associations with the meta-health effects were the evaluation method, the intervention, and the source of funds. Relative values for meta-health effects ranged from 0.9% to 68% of the overall value reported in a study. For a given meta-health effect, the magnitude of the effect evaluated and how the meta-health effect was described and framed relative to overall health explained the differences in relative values.

CONCLUSIONS

Evidence from the literature shows variability in how meta-health effects are being measured for use in economic evaluations. Understanding the sources of that variability is important if decision makers are to have confidence in how meta-health effects are valued.

Comparing preferences for outcomes of psoriasis treatments among patients and dermatologists in the U.K.: results from a discrete-choice experiment

BACKGROUND

Plaque psoriasis can have a significant negative effect on patients' quality of life, and treatments can result in serious toxicities. Although there have been several studies of patients' and physicians' relative preferences for the benefits and risks of psoriasis treatments, it is unclear how and whether patients' and physicians' preferences for the outcomes of psoriasis treatments differ.

OBJECTIVES

To quantify patient and dermatologist preferences for improvements in psoriasis symptoms and for increases in the risk of treatment-related serious adverse events.

METHODS

Members of the U.K. Psoriasis Association and U.K. dermatologists with experience prescribing biologics completed a web-enabled discrete-choice experiment survey in which they evaluated efficacy and safety features of biological treatments for psoriasis. Choices between hypothetical treatment options were used to estimate preference weights indicating respondents' relative trade-off preferences among treatment outcomes. These outcomes included improvements in the severity and coverage of psoriatic plaques and treatment-related risks of tuberculosis, serious infections and lymphoma. Preference estimates were used to derive the maximum level of side-effect risks that respondents would accept for improvements in psoriasis symptoms.

RESULTS

Respondents' tolerance for side-effect risks varied with side-effect severity and location of plaques, and risk tolerance for serious side-effects was greater for patients than for dermatologists.

CONCLUSIONS

Estimates of patients' risk tolerance for serious side-effects indicate that patients valued psoriasis symptom control highly and suggest that psoriasis symptoms have a significant effect on patients' quality of life. In light of research showing increased treatment satisfaction and improved treatment adherence among patients who receive therapies that are consistent with their preferences, our findings suggest that greater communication between dermatologists and patients about risk tolerance could help improve patient care.

Relative Importance of Mode of Administration in Treatment Preferences among Plaque Psoriasis Patients in the United States

Background: Some aspects of psoriasis treatments can negatively influence patients' quality of life. There is evidence from previous preference-elicitation research in psoriasis that administration characteristics are at least as important as treatment outcomes to patients. Objectives: Our objective was to test the hypothesis that patients' preferences for reduced disease and treatment burden are as important as preferences around treatment efficacy. We evaluated patient preferences for attributes of psoriasis treatments, including efficacy, tolerability, and mode and frequency of administration. Methods: Adult patients in the United States with a self-reported physician diagnosis of psoriasis completed an online discrete-choice experiment survey. The survey included eight choice questions, each asking respondents to choose between pairs of hypothetical psoriasis medications defined by attributes including efficacy, adverse reactions, and mode and frequency of administration. A random-parameters logit regression model was used to model the preference data. Results from this model were used to calculate respondents' willingness to trade efficacy for reduced treatment burden. Results: A total of 397 respondents, with a mean self-assessed Psoriasis Activity and Severity Index score of 8.2 (SD, 9.8), provided data for analysis. Improvements in treatment efficacy were more important than improvements in speed of onset and were more important than most increases in the chance of treatment side effects. The maximum possible improvement in treatment efficacy offered in the study was not enough to match the improvements in well being associated with some changes in mode of administration. For example, respondents were willing to accept a reduction in the percentage of patients who achieve clear or almost-clear skin after treatment from approximately 70% to 40% to avoid injections at home and use a topical treatment. Topical treatments were the most preferred option of administration followed by oral agents and intravenous infusion. Conclusions: Psoriasis patients had well-defined preferences for changes in the treatment attributes considered. Avoiding injections in favor of oral or topical treatment was more important to patients than some improvements in efficacy. These findings support previous research regarding the importance of treatment burden relative to outcomes in psoriasis and emphasize the importance of individual patient preferences in determining treatment strategy.

Adherence, satisfaction and preferences for treatment in patients with psoriasis in the European Union: a systematic review of the literature

BACKGROUND AND OBJECTIVE

Adherence to treatment in patients with psoriasis is often poor. An investigation of patient preferences and satisfaction with treatment may be important, based on the expected correlation with therapy compliance. This paper aims to examine and describe the current literature on patient preferences, satisfaction and adherence to treatment for psoriasis in the European Union (EU).

METHODS

Electronic searches were conducted using PubMed, ISI Web of Knowledge, Scopus, Spanish databases and Google Scholar. European studies published in English or Spanish between January 1, 2009 and December 31, 2014 regarding patient-reported outcomes in psoriatic patients were included. Studies conducted in non-EU countries, letters to the editor, editorials, experts' opinions, case studies, congress proceedings, publications that did not differentiate between patients with psoriasis and psoriatic arthritis or studies related to specific treatment were excluded.

RESULTS

A total of 1,769 titles were identified, of which 1,636 were excluded as they were duplicates or did not provide any relevant information. After a full-text reading and application of the inclusion/exclusion criteria, 46 publications were included. This paper will describe publications on adherence (n=4), preferences (n=5) and satisfaction with treatment (n=7). Results related to health-related quality of life articles (n=30) have been published elsewhere. Adherence rates are generally low in psoriasis patients regardless of the type of treatment, severity of disease or methods used to measure adherence. Biologic therapy is associated with greater clinical improvement. There is a direct association between physician recommendations, patient preferences and several domains of treatment satisfaction.

CONCLUSION

The results of this review support the conclusion that adherence rates in patients with psoriasis are suboptimal and highlight the need to improve patient compliance and satisfaction with treatment. Patients' preferences should be taken into account in the treatment decision-making process in order to improve patients' clinical outcomes by ensuring satisfaction and adherence.

Characterizing patients with psoriasis on injectable biologics adalimumab, etanercept, and ustekinumab: A chart review study

OBJECTIVE

This study examined plaque psoriasis (PsO) patient characteristics across injectable biologics.

METHODS

Data were collected from 400 US dermatologists randomly selecting five charts each for patients with PsO (patient n  =  2000): adalimumab (ADA; n  =  447), etanercept (ETA; 539), ustekinumab (UST) 45 mg (511) and UST 90 mg (503). Physicians had to have been in practice 2-30 years, managing 10+  patients (5 + with biologics for PsO). Generalized estimating equation models, weighted according to inverse probability of patient selection and accounting for patient correlation within physicians, examined patient measures as a function of treatment (UST 90 mg = reference).

RESULTS

Patients on UST 90 mg had higher odds of weighing  >100 kg (adjusted mean  =  34.4%) vs. ADA (10.9%), ETA (5.5%) or UST 45 mg (6.8%), greater body surface affected and higher odds of severe PsO prior to treatment and higher odds of prior biologics use. Mean prior biologics used was higher with UST 90 mg versus ADA or ETA. Number of comorbidities was higher with UST 90 mg versus ETA or UST 45 mg.

CONCLUSIONS

Among biologics-treated patients with PsO, UST 90 mg appears to be used in patients with greater weight, baseline severity and prior biologics experience than ADA, ETA or UST 45 mg. UST 90 mg is used in patients with more comorbidities than other treatments except ADA.

Elimination and selection by aspects in health choice experiments: prioritising health service innovations

Priorities for public health innovations are typically not considered equally by all members of the public. When faced with a choice between various innovation options, it is, therefore, possible that some respondents eliminate and/or select innovations based on certain characteristics. This paper proposes a flexible method for exploring and accommodating situations where respondents exhibit such behaviours, whilst addressing preference heterogeneity. We present an empirical case study on the public's preferences for health service innovations. We show that allowing for elimination-by-aspects and/or selection-by-aspects behavioural rules leads to substantial improvements in model fit and, importantly, has implications for willingness to pay estimates and scenario analysis.