Qiufei Ma

Indirect Treatment Comparison of Talimogene Laherparepvec Compared with Ipilimumab and Vemurafenib for the Treatment of Patients with Metastatic Melanoma

IntroductionFew randomized controlled trials have compared new treatments for metastatic melanoma. We sought to examine the relative treatment effect of talimogene laherparepvec compared with ipilimumab and vemurafenib.MethodsA systematic literature review of treatments for metastatic melanoma was undertaken but a valid network of evidence could not be established because of a lack of comparative data or studies with sufficient common comparators. A conventional adjusted indirect treatment comparison via network meta-analysis was, therefore, not feasible. Instead, a meta-analysis of absolute efficacy was undertaken, adjusting overall survival (OS) data for differences in prognostic factors between studies using a published algorithm.ResultsFour trials were included in the final indirect treatment comparison: two of ipilimumab, one of vemurafenib, and one of talimogene laherparepvec. Median OS for ipilimumab and vemurafenib increased significantly when adjustment was applied, demonstrating that variation in disease and patient characteristics was biasing OS estimates; adjusting for this made the survival data more comparable. For both ipilimumab and vemurafenib, the adjustments improved Kaplan–Meier OS curves; the observed talimogene laherparepvec OS curve remained above the adjusted OS curves for ipilimumab and vemurafenib, showing that long-term survival could differ from the observed medians.ConclusionEven with limited data, talimogene laherparepvec, ipilimumab, and vemurafenib could be compared following adjustments, thereby providing a more reliable understanding of the relative effect of treatment on survival in a more comparable patient population. The results of this analysis suggest that OS with talimogene laherparepvec is at least as good as with ipilimumab and vemurafenib and improvement was more pronounced in patients with no bone, brain, lung or other visceral metastases.FundingAmgen Inc.

Patterns of use of systemic therapies among patients with metastatic melanoma: a retrospective claims database analysis in the United States

Abstract Objectives: This retrospective analysis of the IMS PharMetrics Plus claims database aimed to describe the current real-world treatment patterns for metastatic melanoma in the USA. Methods: Included patients (aged ≥18 years) had ≥1 prescription for ipilimumab, vemurafenib, temozolomide or dacarbazine between 1 January 2011 and 31 August 2013; diagnosis of melanoma and metastasis before first use (index date); no index drug use prior to the index date; continuous health plan enrollment for ≥6 months before and ≥3 months after index date. Proportion of days covered (PDC) was defined as days exposed to index therapy divided by continuously enrolled days between index date and last prescription date. Results: Overall, 1043 patients were included (median age 57 years, 63% male), of whom 39% received the index drug ipilimumab, 35% vemurafenib, 19% temozolomide and 7% dacarbazine. Mean treatment duration (days) was 174 (vemurafenib), 100 (temozolomide) and 64 (dacarbazine). Mean PDC was 81% (vemurafenib), 67% (temozolomide) and 51% (dacarbazine). For patients receiving ipilimumab, 58% had the full 4 doses, 20% 3 doses, 14% 2 doses and 9% 1 dose only for the first induction course; 4% received re-induction, and none had a second re-induction. Conclusions: This study provides insights into the treatment patterns for metastatic melanoma, including newer agents, in real-world clinical practice.

Use Patterns and Costs of Isolated Limb Perfusion and Infusion in the Treatment of Regionally Metastatic Melanoma: A Retrospective Database Analysis

Aim: Isolated limb perfusion and infusion (ILP/ILI) are therapies for regionally metastatic melanoma where high doses of anticancer drugs are delivered directly into the circulation of an affected limb, while minimizing systemic drug exposure. This procedure can lead to high response rates but without proven benefits to overall survival. It is recommended by ESMO and NCCN guidelines as a treatment option for patients with stage III unresectable metastatic melanoma. However, limited information is available on its use pattern and costs in the literature. This study was to examine patterns of ILP/ILI use and associated costs in patients with melanoma in the US. Methods: This is a retrospective, observational study using large administrative claims from the MarketScan® databases. Patients who underwent ILP/ILI (CPT-4: 36823) with diagnosis of melanoma (ICD-9-CM: 172.xx, V10.82) between 1/1/2002 and 3/31/2013 were included. Patient characteristics, use patterns, hospital length of stay, and costs (2013 US

1118PUSE PATTERNS AND COSTS OF ISOLATED LIMB PERFUSION AND INFUSION IN THE TREATMENT OF REGIONALLY METASTATIC MELANOMA: A RETROSPECTIVE DATABASE ANALYSIS

) of ILP/ILI were assessed.

Prevalence of autoimmune comorbidities in patients with metastatic melanoma in the US.

Introduction Isolated limb perfusion and infusion (ILP/ILI) are therapies for regional metastatic melanoma that allow high doses of anticancer drugs to be delivered directly into the circulation of an affected limb, thereby minimizing systemic drug toxicity. This procedure can lead to high response rates and is recommended in patients with Stage III unresectable metastatic melanoma. However, limited information is available on patterns of use and costs. This study examined patterns of ILP/ILI use and associated costs in patients with melanoma in the United States (US).