Cost-effectiveness of opicapone and entacapone in reducing OFF-time in Parkinson's disease patients treated with levodopa/carbidopa

AIMS

To assess from a US payer perspective the relative cost-effectiveness of the catechol-O-methyltransferase inhibitors opicapone and entacapone when used adjunctively to levodopa/carbidopa (LD/CD) in patients with Parkinson's disease (PD), based on the drugs' effects to reduce absolute OFF-time hours in PD patients.

MATERIALS AND METHODS

A Markov model was created to estimate cost-effectiveness of adjunctive opicapone treatment compared with adjunctive entacapone treatment in a synthetic cohort of 1,000 patients with PD taking LD/CD. Clinical inputs were derived from clinical trials, published literature, and expert opinion. Cost data (in 2018 US dollars) were obtained from the Centers for Medicare & Medicaid Services, the Kaiser Family Foundation, and Analy$ource. Cost-effectiveness outcomes included incremental cost per OFF-time hours avoided, cost per life year gained, and cost per quality-adjusted life year (QALY) gained. Outcomes were projected over a 25-year lifetime horizon and discounted at 3% annually.

RESULTS

Opicapone treatment was associated with an average of 1,187 fewer OFF-time hours per patient and an increase of 0.07 QALYs compared with entacapone. Total lifetime costs for opicapone were $3,100 higher than entacapone, resulting in an incremental cost-effectiveness ratio of $46,900 per QALY. One-way sensitivity analyses showed the model was most sensitive to mean OFF-time hours associated with opicapone and entacapone. Probabilistic sensitivity analysis suggested a 60-65% probability that opicapone was cost-effective relative to entacapone at any willingness-to-pay threshold ≥$5,000.

LIMITATIONS

There exists a single head-to-head clinical trial comparing the effectiveness of opicapone with entacapone, thus the clinical inputs regarding relative treatment effect of the drugs to reduce OFF-time hours in PD patients receiving LD/CD were derived from that single non-inferiority trial.

CONCLUSIONS

Add-on treatment with opicapone in PD patients receiving LD/CD appeared to be cost-effective compared with entacapone.

THE AUTHORS RESPOND

DISCLOSURES: Funding for the study referred to in this letter was contributed by Bayer Healthcare. Xia and Williamson are employees of Bayer Healthcare. Roth, Carlson, and Sullivan are consultants to Bayer Healthcare. Carlson also reports fees from Adaptive Biotechnologies, unrelated to the study. Roth reports consulting fees from BMS, unrelated to the study.

Application of Health Technology Assessment (HTA) to Evaluate New Laboratory Tests in a Health System: A Case Study of Bladder Cancer Testing

We describe the methods and decision from a health technology assessment of a new molecular test for bladder cancer (Cxbladder), which was proposed for adoption to our send-out test menu by urology providers. The Cxbladder health technology assessment report contained mixed evidence; predominant concerns were related to the test’s low specificity and high cost. The low specificity indicated a high false-positive rate, which our laboratory formulary committee concluded would result in unnecessary confirmatory testing and follow-up. Our committee voted unanimously to not adopt the test system-wide for use for the initial diagnosis of bladder cancer but supported a pilot study for bladder cancer recurrence surveillance. The pilot study used real-world data from patient management in the scenario in which a patient is evaluated for possible recurrent bladder cancer after a finding of atypical cytopathology in the urine. We evaluated the type and number of follow-up tests conducted including urine cytopathology, imaging studies, repeat cystoscopy evaluation, biopsy, and repeat Cxbladder and their test results. The pilot identified ordering challenges and suggested potential use cases in which the results of Cxbladder affected a change in management. Our health technology assessment provided an objective process to efficiently review test performance and guide new test adoption. Based on our pilot, there were real-world data indicating improved clinician decision-making among select patients who underwent Cxbladder testing.

A pragmatic randomized clinical trial of insulin glargine 300 U/mL vs first-generation basal insulin analogues in insulin-naïve adults with type 2 diabetes: 6-month outcomes of the ACHIEVE Control study

AIMS

To compare the safety and efficacy of insulin glargine 300 U/mL (Gla-300) versus first-generation standard-of-care basal insulin analogues (SOC-BI; insulin glargine 100 U/mL or insulin detemir) at 6 months.

METHODS

In the 12-month, open-label, multicentre, randomized, pragmatic ACHIEVE Control trial, insulin-naïve adults with type 2 diabetes (T2D) and glycated haemoglobin (HbA1c) 64 to 97 mmol/mol (8.0%-11.0%) after ≥1 year of treatment with ≥2 diabetes medications were randomized to Gla-300 or SOC-BI. The composite primary endpoint, evaluated at 6 months, was the proportion of participants achieving individualized HbA1c targets per Healthcare Effectiveness Data and Information Set (HEDIS) criteria without documented symptomatic (blood glucose ≤3.9 mmol/L [≤70 mg/dL]) or severe hypoglycaemia at any time of the day at 6 months.

RESULTS

Of 1651 and 1653 participants randomized to Gla-300 and SOC-BI, respectively, 31.3% and 27.9% achieved the composite primary endpoint at 6 months (odds ratio [OR] 1.19, 95% confidence interval [CI] 1.01-1.39; P = 0.03 for superiority); 78.4% and 75.3% had no documented symptomatic or severe hypoglycaemia (OR 1.19, 95% CI 1.01-1.41). Changes from baseline to month 6 in HbA1c, fasting plasma glucose, weight, and BI analogue dose were similar between groups.

CONCLUSIONS

Among insulin-naïve adults with poorly controlled T2D, Gla-300 was associated with a statistically significantly higher proportion of participants achieving individualized HEDIS HbA1c targets without documented symptomatic or severe hypoglycaemia (vs SOC-BI) in a real-life population managed in a usual-care setting. The ACHIEVE Control study results add value to treatment decisions and options for patients, healthcare providers, payers and decision makers.

The Potential Long-Term Comparative Effectiveness of Larotrectinib and Entrectinib for Second-Line Treatment of TRK Fusion-Positive Metastatic Lung Cancer

BACKGROUND

Larotrectinib and entrectinib are FDA-approved therapies for patients with non-small cell lung cancer (NSCLC) with neurotrophic receptor tyrosine kinase gene fusion (TRK fusion-positive) whose cancer has metastasized and progressed. Early evidence indicates that these targeted therapies may offer dramatic survival benefits versus traditional cytotoxic regimens, but it remains uncertain how larotrectinib and entrectinib compare with each other.

OBJECTIVE

To simulate and compare expected life-years and quality-adjusted life-years (QALYs) for both TRK inhibitors.

METHODS

We developed a partitioned survival model to project the long-term comparative effectiveness of larotrectinib versus entrectinib in second-line treatment of metastatic NSCLC. Larotrectinib survival data were derived from a 13-month follow-up of 12 patients with TRK fusion-positive NSCLC in the NCT02122913 (phase 1) and NCT02576431 (NAVIGATE) trials. Entrectinib survival data were derived from a 13-month follow-up of 10 patients with TRK fusion-positive NSCLC in the ALKA-372-001, STARTRK-1, and STARTRK-2 trials. For larotrectinib and entrectinib progression-free survival and overall survival (OS), in-trial survival was extrapolated using parametric curve fits. Exponential fits were selected for all survival models based on minimal Bayesian information criteria and clinical plausibility. Lifetime survival curves were used to estimate expected mean/median survival. QALYs were estimated by applying preprogression and postprogression health state utilities derived from the literature.

RESULTS

In the base case, treatment with larotrectinib and entrectinib resulted in 5.4 and 1.2 median preprogression life-years and 7.0 and 1.8 median total life-years, respectively. Mean preprogression life-years (QALYs) were 7.5 (5.0) and 1.9 (1.2), and mean total life-years (QALYs) were 9.2 (5.8) and 4.4 (2.4), respectively.

CONCLUSIONS

Among TRK inhibitors for metastatic NSCLC, larotrectinib is estimated to provide improved life-year and QALY outcomes versus entrectinib based on parametric extrapolations of in-trial survival data. Our analysis is limited by lack of NSCLC-specific data on entrectinib OS, the small samples of patients with NSCLC in the trials, and a cross-trial comparison. Future studies should re-evaluate the comparative effectiveness of larotrectinib versus entrectinib as more patients are treated and as long-term survival data mature.

DISCLOSURES

Funding for this study was contributed by Bayer Healthcare, which reviewed the manuscript drafts, and employees contributed to the manuscript as coauthors. Xia and Williamson are employees of Bayer Healthcare. Roth, Carlson, and Sullivan are consultants to Bayer Healthcare and retain rights to all final revisions to the manuscript. Carlson also reports fees from Adaptive Biotechnologies, unrelated to this work. Roth reports consulting fees from BMS, unrelated to this work.

Cost effectiveness and impact on quality of life of abobotulinumtoxinA and onabotulinumtoxinA in the treatment of children with lower limb spasticity in Canada

Background: Injectable botulinum neurotoxins are a mainstay of treatment for pediatric spasticity. AbobotulinumtoxinA and onabotulinumtoxinA are both injectable toxin therapies used to treat pediatric lower limb (PLL) spasticity in Canada. The objective of this study was to assess the cost-effectiveness of abobotulinumtoxinA vs. onabotulinumtoxinA in the treatment of PLL spasticity in Canada.Methods: A probabilistic Markov cohort model with a 2-year time horizon was developed, with health states defined by response to therapy, as characterized by the goal attainment scale (GAS). Based on randomized controlled trial evidence, response to therapy was similar or higher for abobotulinumtoxinA relative to onabotulinumtoxinA; uncertainty was incorporated into model parameters, however, as the two therapies have not been compared head-to-head. Canadian resource use and cost data were incorporated.Results: In the base case, abobotulinumtoxinA generated 1.48 quality-adjusted life years over the model time horizon, compared to 1.47 for onabotulinumtoxinA. AbobotulinumtoxinA was associated with cost savings of $123 CAD, reflecting lower costs in both medication acquisition and health services. The estimated improvement to quality of life and reduced costs result in an estimate of economic dominance for abobotulinumtoxinA over onabotulinumtoxinA. This dominant result persisted across probabilistic and scenario analyses.Key points for decision makersBased on a review of available clinical evidence, abobotulinumtoxinA was found to have significant and/or numerical efficacy benefits to onabotulinumtoxinA on functional outcomes (Goal Attainment Scale) and tone (Modified Ashworth Scale) and in the treatment of pediatric lower limb spasticityIn this cost-effectiveness analysis, abobotulinumtoxinA was found to be associated with greater quality-adjusted life years and lower costs than onabotulinumtoxinA (economically dominant)A limitation of this analysis was the uncertainty around key parameters. Specifically, the lack of head-to-head comparison data for the two therapies, and variable data regarding likely onabotulinumtoxinA dosing in PLL in clinical practice. However, across a range of plausible scenarios, the economic dominant result remained.

Evolution of the AMCP Format for Formulary Submissions

DISCLOSURES

No funding was required for this project. The authors are or have been members of the Format Executive Committee.

Pharmacoeconomic Evaluations: Guidelines for Drug Purchasers

OBJECTIVE

To propose a set of guidelines for use by health care organizations in the United States that seek useful, comparative clinical information and economic analysis on pharmaceutical products to make sound drug purchasing decisions.

PRACTICE INNOVATION

Based on a therapy intervention approach, the guidelines provide a structured framework to help managed care purchasers become more consistent in how they evaluate drug products for inclusion in the formulary. The guidelines factor in the need to examine the impact of new drug products on overall costs within the entire health system.

PRACTICE SETTING

Intended for use by managed care organizations in the U.S. that purchase prescription drugs.

INTERVENTION

Not applicable.

MAIN OUTCOME MEASURE

Not applicable.

RESULTS

The guidelines provide MCOs with a new systematic approach for identifying the overall cost and clinical outcomes impact of drug therapies. The guidelines are designed to take into account the characteristics of the patient population being treated and the fact that patients generally are redistributed among different treatment categories once a new drug product is introduced, thus offering MCOs an analysis model that extends beyond the traditional partial cost-outcomes approach. Emphasis is placed on looking at the cost-outomes impact of a new drug or therapy within a systems or disease area framework in which the redistribution of patients between therapy options is explicitly modelled. The guidelines specify that the following information elements be used in pharmacoeonomic analysis: product description, place in therapy, comparator products, therapy intervention framework, supporting clinical data, supporting pharmacoeconomic data, system impact assessments-costs-outcomes, overall assessment, and bibliography and supporting materials.

Real-world outcomes of treatment with insulin glargine 300 U/mL versus standard-of-care in people with uncontrolled type 2 diabetes mellitus

Objective: To compare real-world outcomes with newer (insulin glargine 300 U/mL; Gla-300) versus standard of care (SoC) basal insulins (BIs) in the REACH (insulin-naïve; NCT02967224) and REGAIN (basal insulin-treated; NCT02967211) studies in participants with uncontrolled type 2 diabetes (T2DM) in Europe and Brazil.Methods: In these open-label, parallel-group, pragmatic studies, patients (HbA_1c > 7.0%) were randomized to Gla-300 or SoC BI for a 6-month treatment period (to demonstrate non-inferiority of Gla-300 vs SoC BIs for HbA_1c change [non-inferiority margin 0.3%]) and a 6-month extension period (continuing with their assigned treatment). Insulin titration/other medication changes were at investigator/patient discretion post-randomization.Results: Overall, 703 patients were randomized to treatment in REACH (Gla-300, n = 352; SoC, n = 351) and 609 (Gla-300, n = 305, SoC, n = 304) in REGAIN. The primary outcome, non-inferiority of Gla-300 versus SoC for HbA_1c change from baseline to month 6, was met in REACH (least squares [LS] mean difference 0.12% [95% CI -0.046 to 0.281]) but not REGAIN (LS mean difference 0.17% [0.015-0.329]); no between-treatment difference in HbA_1c change was shown after 12 months in either study. BI dose increased minimally from baseline to 12 months in REACH (Gla-300, +0.17 U/kg; SoC, +0.15 U/kg) and REGAIN (Gla-300, +0.11 U/kg; SoC, +0.07 U/kg). Hypoglycemia incidence was low and similar between treatment arms in both studies.Conclusions: In both REACH and REGAIN, no differences in glycemic control or hypoglycemia outcomes with Gla-300 versus SoC BIs were seen over 12 months. However, the suboptimal insulin titration in REACH and REGAIN limits comparisons of outcomes between treatment arms and suggests that more titration instruction/support may be required for patients to fully derive the benefits from newer basal insulin formulations.

Abstract LB-B18: The Potential Long-Term Comparative Effectiveness of Larotrectinib vs. Entrectinib for Second-Line Treatment of NTRK Fusion-Positive Metastatic Non-Small Cell Lung Cancer

Background: Larotrectinib and Entrectinib are FDA-approved for patients with non-small cell lung cancer (NSCLC) that has neurotrophic receptor tyrosine kinase gene fusion (NTRK+), are metastatic, and whose cancer has progressed. Early evidence indicates that these targeted therapies may offer potentially dramatic survival benefits vs. traditional cytotoxic regimens, but it remains uncertain how Larotrectinib and Entrectinib compare to each other. The objective of this study was to simulate and compare expected life years and Quality-Adjusted Life Years (QALYs) for both NTRK-targeted therapies. Methods: We developed a partitioned survival model to project long-term comparative effectiveness of Larotrectinib vs. Entrectinib in second-line treatment of metastatic NSCLC. Larotrectinib survival data were derived from 13-month follow-up of 12 NTRK+ NSCLC patients in the NCT02122913 (Phase 1) and NCT02576431 (NAVIGATE) trials. Entrectinib survival data were derived from 13-month follow-up of 54 NTRK+ patients (10 NTRK+ NSCLC patients) in the ALKA-372-001, STARTRK-1, and STARTRK-2 trials. For larotrectinib progression free (PFS) and overall survival (OS) and entrectinib OS, in-trial survival was extrapolated using parametric curve fits (Weibull, Exponential, Log-Logistic, Gamma). For entrectinib PFS, an exponential model was fit to the median PFS estimate for the 10 NTRK+ NSCLC patients. Exponential fits were selected for all base case survival models based on minimal Bayesian Information Criteria (BIC), clinical plausibility, and visual inspection. Lifetime survival curves were used to estimate expected mean and median progression-free and overall survival duration. QALYs were estimated by applying pre-progression and post-progression health state utilities and Grade 3/4 adverse event disutilities derived from literature. Results:In the base case, treatment with larotrectinib and entrectinib resulted in 5.4 and 1.3 median pre-progression life years and 7.0 and 1.9 median total life years, respectively. Mean pre-progression life years (QALYs) were 6.5 (4.3) and 1.8 (1.2) and mean total life years (QALYs) were 7.5 (4.8) and 2.5 (1.5), respectively. Discussion Among NTRK fusion protein-targeted therapies for metastatic NSCLC, larotrectinib is estimated to provide improved life year and QALY outcomes vs. entrectinib based on parametric extrapolations of in-trial survival data. Our analysis is limited by lack of NSCLC-specific data on entrectinib OS, the small sample size of NSCLC patients in source trials, and a naïve direct (cross-trial) comparison. Future studies should re-evaluate the comparative effectiveness of larotrectinib vs. entrectinib as greater numbers of patients are treated and as long-term survival data mature.

Citation Format: Joshua A Roth, Josh J Carlson, Todd Williamson, Sean D Sullivan. The Potential Long-Term Comparative Effectiveness of Larotrectinib vs. Entrectinib for Second-Line Treatment of NTRK Fusion-Positive Metastatic Non-Small Cell Lung Cancer [abstract]. In: Proceedings of the AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics; 2019 Oct 26-30; Boston, MA. Philadelphia (PA): AACR; Mol Cancer Ther 2019;18(12 Suppl):Abstract nr LB-B18. doi:10.1158/1535-7163.TARG-19-LB-B18

Treatment Patterns, Overall Survival, and Total Healthcare Costs of Advanced Merkel Cell Carcinoma in the USA

BACKGROUND

Merkel cell carcinoma (MCC) is a rare and aggressive type of cancer with poor outcomes.

OBJECTIVE

To describe treatment patterns, overall survival, and healthcare costs associated with advanced MCC (aMCC) using data from Medicare enrollees who received an aMCC diagnosis in the USA States between 2006 and 2013.

METHODS

Surveillance, Epidemiology, and End Results (SEER)-Medicare data from 2006 to 2013 were used to describe treatment patterns, 1- and 5-year overall survival, and total healthcare costs for the periods 12 months before aMCC diagnosis and 4-12 months afterward in patients aged ≥ 65 years.

RESULTS

We identified 257 patients with an aMCC diagnosis, of whom 51% had stage IIIb disease and 49% had stage IV. Within 4 months after diagnosis, 84% of patients (n = 216) received treatment; 45% (n = 115) received surgery, 48% (n = 124) radiation therapy, and 31% (n = 80) chemotherapy. Second-line chemotherapy was administered in 33% of patients (n = 26) receiving first-line chemotherapy. Median overall survival was 27 months in patients whose aMCC was diagnosed at stage IIIb and 12 months in patients whose aMCC was diagnosed at stage IV. Median total 12-month direct healthcare costs were US$48,006 (25th-75th percentile range = US$30,594-US$69,797) per patient. Total costs were highest in patients receiving chemotherapy, either alone or combined with radiation and/or surgery (US$52,854; 25th-75th percentile range = US$34,473-US$71,987).

CONCLUSION

Most patients with aMCC received initial treatment, including surgery, radiation, and/or chemotherapy, and approximately one-third of those receiving chemotherapy received second-line chemotherapy. Total 12-month direct healthcare costs were highest in patients who received chemotherapy alone or combined with radiation and/or surgery. These poor survival results and high treatment costs highlight the need for effective new aMCC therapies.

Comparable glycaemic control and hypoglycaemia in adults with type 2 diabetes after initiating insulin glargine 300 units/mL or insulin degludec: The DELIVER Naïve D real-world study

AIM

To compare glycaemic control, hypoglycaemia and treatment discontinuation of insulin glargine 300 units/mL (Gla-300) and insulin degludec (IDeg) in a real-world study of insulin-naïve adults with type 2 diabetes (T2D).

MATERIALS AND METHODS

DELIVER Naive D was a retrospective observational study that used electronic medical record data from the IBM Watson Health Explorys database. Insulin-naïve adults with T2D who started Gla-300 or IDeg between March 2015 and September 2017 were identified. Patients were active in the system for ≥12 months before and ≥6 months after starting Gla-300 or IDeg and had HbA1c measurements during 6-month baseline and 3- to 6-month follow-up. Outcomes were compared among 1:1 propensity score-matched cohorts.

RESULTS

In the matched cohorts (n = 638 each), the mean age was 59 years, approximately 53% were male, and mean HbA1c was 9.67% (82 mmol/mol). Mean (SD) HbA1c decreases were comparable in the Gla-300 and IDeg cohorts (-1.67% [2.22] and -1.58% [2.20]; P = 0.51), as were HbA1c target attainment [<7% (53 mmol/mol): 23.8% and 27.4%; P = 0.20; <8% (64 mmol/mol): 55.0% and 57.1%; P = 0.63] and treatment discontinuation (29.2% and 32.6%; P = 0.14). Overall and inpatient/emergency department-associated hypoglycaemia incidences and event rates were similar in both cohorts using fixed 6-month or variable on-treatment follow-up.

CONCLUSIONS

Among real-world insulin-naïve adults with T2D, initiation of Gla-300 or IDeg resulted in comparable improvements in glycaemic control and similar rates of hypoglycaemia. These real-world data complement and confirm a randomized trial and other real-world studies.

Effective stakeholder engagement: design and implementation of a clinical trial (SWOG S1415CD) to improve cancer care

Background

The Fred Hutchinson Cancer Research Center has engaged an External Stakeholder Advisory Group (ESAG) in the planning and implementation of the TrACER Study (S1415CD), a five-year pragmatic clinical trial assessing the effectiveness of a guideline-based colony stimulating factor standing order intervention. The trial is being conducted by SWOG through the National Cancer Institute Community Oncology Research Program in 45 clinics. The ESAG includes ten patient partners, two payers, two pharmacists, two guideline experts, four providers and one medical ethicist. This manuscript describes the ESAG’s role and impact on the trial.

Methods

During early trial development, the research team assembled the ESAG to inform plans for each phase of the trial. ESAG members provide feedback and engage in problem solving to improve trial implementation. Each year, members participate in one in-person meeting, web conferences and targeted email discussion. Additionally, they complete a survey that assesses their satisfaction with communication and collaboration. The research team collected and reviewed stakeholder input from 2014 to 2018 for impact on the trial.

Results

The ESAG has informed trial design, implementation and dissemination planning. The group advised the trial’s endpoints, regimen list and development of cohort and usual care arms. Based on ESAG input, the research team enhanced patient surveys and added pharmacy-related questions to the component application to assess order entry systems. ESAG patient partners collaborated with the research team to develop a patient brochure and study summary for clinic staff. In addition to identifying recruitment strategies and patient-oriented platforms for publicly sharing results, ESAG members participated as co-authors on this manuscript and a conference poster presentation highlighting stakeholder influence on the trial. The annual satisfaction survey results suggest that ESAG members were satisfied with the methods, frequency and target areas of their engagement in the trial during project years 1–3.

Conclusions

Diverse stakeholder engagement has been essential in optimizing the design, implementation and planned dissemination of the TrACER Study. The lessons described in the manuscript may assist others to effectively partner with stakeholders on clinical research.

Analytic Considerations in Applying a General Economic Evaluation Reference Case to Gene Therapy

The concept of a reference case, first proposed by the US Panel on Cost-Effectiveness in Health and Medicine, has been used to specify the required methodological features of economic evaluations of healthcare interventions. In the case of gene therapy, there is a difference of opinion on whether a specific methodological reference case is required. The aim of this article was to provide a more detailed analysis of the characteristics of gene therapy and the extent to which these characteristics warrant modifications to the methods suggested in general reference cases for economic evaluation. We argue that a completely new reference case is not required, but propose a tailored checklist that can be used by analysts and decision makers to determine which aspects of economic evaluation should be considered further, given the unique nature of gene therapy.

Estimating Long-Term Survival for Patients with Relapsed or Refractory Large B-Cell Lymphoma Treated with Chimeric Antigen Receptor Therapy: A Comparison of Standard and Mixture Cure Models

Patients treated with anti-CD19 chimeric antigen receptor (CAR) T-cell therapies have shown either sustained remission or rapid progression. Traditional survival modeling may underestimate outcomes in these situations, by assuming the same mortality rate for all patients. To illustrate this issue, we compare standard parametric models to mixture cure models for estimating long-term overall survival in patients with relapsed or refractory large B-cell lymphoma treated with axicabtagene ciloleucel (axi-cel). Compared to standard models without cure proportions, mixture cure models have similar fit, but substantially different extrapolated survival. Standard models (Weibull and generalized gamma) estimate mean survival of 2.0 years (95% CI (1.5, 3.0)) and 3.0 years (95% CI (1.7, 5.6)), respectively, compared to 15.7 years (95% CI (9.3, 21.1)) and 17.5 yrs (12.0, 22.8) from mixture cure models (using Weibull and generalized gamme distributions). For cancer therapies where substantial fractions achieve long term remission, our results suggest that assumptions of the modeling approach should be considered. Given sufficient follow-up, mixture cure models may provide a more accurate estimate of long-term overall survival compared with standard models.

Cost-effectiveness of axicabtagene ciloleucel for adult patients with relapsed or refractory large B-cell lymphoma in the United States

PURPOSE

Axicabtagene ciloleucel (axi-cel) was recently approved for treatment of relapsed or refractory (R/R) large B-cell lymphoma (LBCL) following two or more prior therapies. As the first CAR T-cell therapy available for adults in the US, there are important questions about clinical and economic value. The objective of this study was to assess the cost-effectiveness of axi-cel compared to salvage chemotherapy using a decision model and a US payer perspective.

MATERIALS AND METHODS

A decision model was developed to estimate life years (LYs), quality-adjusted life years (QALYs), and lifetime cost for adult patients with R/R LBCL treated with axi-cel vs salvage chemotherapy (R-DHAP). Patient-level analyses of the ZUMA-1 and SCHOLAR-1 studies were used to inform the model and to estimate the proportion achieving long-term survival. Drug and procedure costs were derived from US average sales prices and Medicare reimbursement schedules. Future healthcare costs in long-term remission was derived from per capita Medicare spending. Utility values were derived from patient-level data from ZUMA-1 and external literature. One-way and probabilistic sensitivity analyses evaluated uncertainty. Outcomes were calculated over a lifetime horizon and were discounted at 3% per year.

RESULTS

In the base case, LYs, QALYs, and lifetime costs were 9.5, 7.7, and $552,921 for axi-cel vs 2.6, 1.1, and $172,737 for salvage chemotherapy, respectively. The axi-cel cost per QALY gained was $58,146. Cost-effectiveness was most sensitive to the fraction achieving long-term remission, discount rate, and axi-cel price. The likelihood that axi-cel is cost-effective was 95% at a willingness to pay of $100,000 per QALY.

CONCLUSION

Axi-cel is a potentially cost-effective alternative to salvage chemotherapy for adults with R/R LBCL. Long-term follow-up is necessary to reduce uncertainties about health outcomes.

Depression and Health Care Utilization at End of Life Among Older Adults With Advanced Non-Small-Cell Lung Cancer

CONTEXT

Limited data exist regarding how depression diagnosed at different times relative to a cancer diagnosis may affect healthcare utilization at end of life (EOL).

OBJECTIVES

To assess the relationship between depression and health care utilization at EOL among older adults (ages >=67) diagnosed with advanced non-small cell lung cancer (NSCLC) from 2009 to 2011.

METHODS

Using the SEER-Medicare database, we fit multivariable logistic regression models to explore the association of depression with duration of hospice stay plus high-intensity care, for example inpatient admissions, in-hospital death, emergency department visits, and chemotherapy at EOL. We used a regression model to evaluate hospice enrollment, accounting for the competing risk of death.

RESULTS

Among 13,827 subjects, pre-cancer depression was associated with hospice enrollment (sub-hazard ratio 1.19, 95% confidence interval [CI] 1.11-1.28), 90 + hospice days (adjusted odds ratio [aOR] 1.29, 95% CI 1.06-1.58), and lower odds of most utilization; we found no association with EOL chemotherapy. Diagnosis-time depression was associated with hospice enrollment (SHR 1.16, 95% CI 1.05-1.29) but not high-intensity utilization. Post-diagnosis depression was associated with lower hospice enrollment (SHR 0.80, 95% CI 0.74-0.85) and higher odds of ICU admission (aOR 1.18, 95% CI 1.01-1.37).

CONCLUSION

EOL healthcare utilization varied by timing of depression diagnosis. Those with pre-cancer depression had lower odds of high-intensity healthcare, were more likely to utilize hospice, and have longer hospice stays. Regular depression screening and treatment may help patients optimize decision-making for EOL care. Additionally, hospice providers may need additional resources to attend to mental health needs in this population.

Price elasticities of pharmaceuticals in a value based-formulary setting

Empirical estimates of price elasticities of demand (PED) for pharmaceuticals suggest that they are relatively price inelastic. However, in many settings, a medication and its substitutes and complements face simultaneous differential changes in prices that affect the observed "composite" PED. We exploit an implementation of a value-based formulary (VBF) that utilized drug-specific incremental cost-effectiveness ratios (ICERs) to inform drug copayments, resulting in increases in copayments for some medications and decreases in copayments for others. We first show theoretically that by changing the price of a medication and its substitute in opposite directions, VBF designs can leverage cross-price effects to increase the range of composite PEDs. We then empirically estimate PED and welfare effects using a consumer surplus approach. Overall PED was -0.16, similar to the RAND Health Insurance Experiment estimate. However, there was substantial dispersion of PED across the VBF copayment tiers ranging from -0.09 to -0.87 with a statistically significant trend aligned with the levels of value as reflected by the ICER estimates (p < 0.001). The net welfare increase was $147,000 for the cohort or $28 per member over the postpolicy year. Further experimentations of VBF designs with alternative cost-effectiveness thresholds, copayment levels and value definitions could be quite promising for improving welfare.

Impact of clinic characteristics on the adoption of a guideline-based standing order algorithm and patient accrual in the pragmatic cluster-randomized trial SWOG S1415CD (NCT02728596)

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Background: The S1415CD intervention requires the integration of guideline-based prescribing recommendations and standing orders for primary prophylactic colony stimulating factors into existing chemotherapy order systems at community practices within the National Cancer Institute’s Community Oncology Research Program. We looked at the impact of clinic level characteristics on the length of time needed to successfully adopt the intervention and subsequent patient accrual. Methods: We calculated the length of time between randomization and intervention completion for each intervention arm clinic and classified them as short onset (2-5 months, N = 5), medium onset (6-8 months, N = 12) or long onset (10-12 months, N = 7). We compared baseline survey responses about clinic characteristics to onset times. Results: Type of EMR software and the number of chemotherapy regimens reconfigured for the trial had no effect on onset time. All short and medium onset clinics placed orders through an EMR, while 5 of 7 long onset clinics used paper orders. Long onset clinics had less reported nurse involvement in the reconfiguration workflow (change initiation, approval, fulfillment and dissemination) at 14% of clinics vs. 25% of medium onset and 75% of short onset clinics. The average weekly patient accrual rates observed after intervention completion were 1.0 in the short onset (range 0.6-1.5), 0.8 in the medium onset (0.2-1.3) and 0.6 in the long onset (0.1-2.0). Conclusions: When recruiting clinics for trials that require health record system changes, it may be helpful to consider aspects of the system modification workflow such as type of hospital departments involved, as clinics with less nursing involvement may take longer to complete the changes. The inclusion of clinics using different EMR software did not impede onset, but clinics using paper may require more time. Length of onset had no meaningful impact on weekly accrual rates; however, it did determine when clinics could start recruitment, affecting the total number of months clinics could recruit during the study accrual period. Clinical trial information: NCT02728596.

The influence of patient engagement on the design and implementation of a clinical trial to improve cancer care delivery

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Background: We have engaged 10 patient partners in the development and implementation of S1415CD, a five-year pragmatic clinical trial currently in year 3 assessing the effectiveness of a guideline-based colony stimulating factor standing order intervention (NCT02728596). Patient partners serve as part of a 21-person External Stakeholder Advisory Group (ESAG), which also includes providers, payers and guidelines experts. This abstract explores the influence of patient partners on the design, tools and implementation of S1415CD Methods: Patient partners advise the study team on protocol development, patient-facing materials and implementation challenges over four teleconferences each year, annual in-person meetings and targeted email communication. All patient partner input from 2014-2017 was tracked, collected and reviewed for impact on the trial. Results: Input from patient partners led to the refinement of the study’s patient-reported outcome (PRO) survey questions, the creation of a highly utilized patient brochure, and the formation of talking points for clinic staff to help explain the study. Patient partners in conjunction with high performing sites helped develop strategies for sites with lower patient accrual to optimize the approach and consent of study participants. Conclusions: The sustained engagement of patient partners in S1415CD ensured patient-centeredness in trial design and guided the development of PRO surveys and relevant, high quality patient-facing materials. Drawing on experiential knowledge and insights from their roles as caregivers and advocates, patient partners provided valuable feedback that influenced patient approach and engagement in the study. Embedding patient partners in the research continuum has catalyzed critical discussions and problem solving among the patient partners and study team, which has led to patient-centered solutions to study challenges. Clinical trial information: NCT02728596.

From A to Xeloda: Practical considerations for implementing a chemotherapy regimen ordering system intervention

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Background: SWOG S1415CD (NCT02728596) is a pragmatic trial comparing outcomes of colony stimulating factor (CSF) use in usual care with care that uses guideline-informed standing CSF orders for protocol chemotherapy regimens. To develop the regimen list, we reviewed, reconciled, and compiled a comprehensive list of 77 NCCN-recognized core regimens and 40 biologic variants for breast, non-small cell, and colorectal cancer, meant to capture a broad population and variety of practices and settings. The 24 intervention sites chose regimens representative of the 3 febrile neutropenia (FN) risk categories (high, intermediate, low) from the list to reconfigure in prescription ordering systems. The current analysis seeks to determine whether providing a comprehensive list of regimens resulted in increased enrollment of patients. Methods: For each site, we compared how many core regimens the site reconfigured to their average weekly rate of enrollment from date of first patient enrolled to 4/1/2018, controlled for cooperative group type and site-reported volume of breast, non-small cell lung, and colorectal cancer patients. For each regimen, we determined its relative popularity by tallying how many sites chose to reconfigure it for the trial. Results: Sites reconfigured an average of 56% (range: 19%-100%) of core regimens on our list. The 18 most popular core regimens chosen by 83-96% of sites provided enrollment coverage across all FN risk categories for all intervention sites and accounted for 91% of enrollment, although enrollment among those regimens varied widely (0-18% of all patients enrolled). Reconfiguring more regimens did not correlate with higher average weekly enrollment (r < 0.1). Conclusions: Studies that wish to limit the number of regimens may want to focus on the most popular regimens as identified by committee or preliminary polling. Starting from a comprehensive set of regimens for a pragmatic trial focusing on chemotherapy ordering systems takes more time to compile and vet, is more difficult to implement in databases, is a burden to sites to review and reconfigure in ordering systems, and does not necessarily translate to increased enrollment rates. Clinical trial information: NCT02728596.

Implementing an EHR guideline–based intervention in paper ordering systems

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Background: Studies show Colony Stimulating Factor (CSF) prescribing is inconsistent with national guidelines. SWOG trial S1415CD is a pragmatic study comparing outcomes of CSF use in usual care with care that uses guideline-informed standing CSF orders. The intervention includes embedded CSF orders based on Febrile Neutropenia (FN) risk and system note wording describing guideline recommendations. Of 24 intervention sites, five (20.8%) use paper, presenting the challenge of translating an electronic health record (EHR) intervention to paper order entry systems (OES). Methods: Paper sites were surveyed on their chemotherapy OES to inform translation of the intervention. We worked with sites to develop a workflow consistent with the key principles of the intervention: Recommendation language 1) is present before prescribing CSF, 2) reaches all study-authorized orders, 3) reaches all patients on study-authorized orders, and 4) chemotherapy and CSF are ordered before the patient is enrolled. Results: Each site had a distinct workflow that was reworked (Table 1). Paper sites took 4-10 months (average 7.6) for implementation; EHR sites took 1-10 months (average 4.5). Conclusions: Implementing an EHR-centric intervention in paper sites is feasible with appropriate time and resources built into a project to account for the unique challenges. As paper sites represented one fifth of the intervention sites, it is vital to include paper sites in OES interventions for generalizability of results. Clinical trial information: NCT02728596. [Table: see text]

Clinical outcomes in real-world patients with type 2 diabetes switching from first- to second-generation basal insulin analogues: Comparative effectiveness of insulin glargine 300 units/mL and insulin degludec in the DELIVER D+ cohort study

AIMS

To compare clinical outcomes in patients with type 2 diabetes (T2D) switching from insulin glargine 100 units/mL (Gla-100) or insulin detemir (IDet) to insulin glargine 300 units/mL (Gla-300) or insulin degludec (IDeg).

MATERIALS AND METHODS

We conducted a retrospective, observational study of electronic medical records for Gla-300/IDeg adult switchers (March 1, 2015 to January 31, 2017) with active records for 12-month baseline (glycated haemoglobin [HbA1c] used a 6-month baseline period) and 6-month follow-up periods. Gla-300 and IDeg switchers were propensity score-matched using baseline demographic and clinical characteristics. Outcomes were HbA1c change and goal attainment (among patients with HbA1c captured at follow-up), and hypoglycaemia with fixed follow-up (intention-to-treat [ITT]; 6 months) and variable follow-up (on-treatment [OT]; to discontinuation or 6 months).

RESULTS

Each matched cohort comprised 1592 patients. The mean decrease in HbA1c and HbA1c goal (<7.0% [53 mmol/mol] and <8.0% [64 mmol/mol]) attainment rates were similar for Gla-300 (n = 742) and IDeg (n = 727) switchers. Using fixed follow-up (ITT method), hypoglycaemia incidence decreased significantly from baseline with Gla-300 (all hypoglycaemia: 15.6% to 12.7%; P = .006; hypoglycaemia associated with inpatient/emergency department [ED] encounter: 5.3% to 3.5%; P = .007), but not with IDeg. After adjusting for baseline hypoglycaemia, no significant differences in hypoglycaemia incidence and event rate were found at follow-up (ITT) for Gla-300 vs IDeg. Using variable follow-up (OT), hypoglycaemia incidence was similar in both groups, but Gla-300 switchers had a lower inpatient/ED hypoglycaemia event rate at follow-up (adjusted rate ratio 0.56; P = .016).

CONCLUSIONS

In a real-world setting, switching from Gla-100 or IDet to Gla-300 or IDeg was associated with similar improvements in glycaemic control and hypoglycaemia in adult patients with T2D.