PART 1 – for public observers

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Presentation transcript:

PART 1 – for public observers Liposomal cytarabine and daunorubicin for untreated acute myeloid leukaemia [ID1225] – 2nd appraisal committee meeting Chair’s presentation Lead team: David Chandler, John Hampson, Natalie Hallas ERG: CRD and CHE, University of York NICE technical team: Kirsty Pitt and Alex Filby Company: Jazz Pharmaceuticals 27th September 2018 National Institute for Health and Care Excellence Pre-meeting briefing – liposomal cytarabine and daunorubicin for untreated acute myeloid leukaemia Issue date: July 2018

Key issues for consideration Does the additional evidence improve the clinical plausibility of the results? Are the post-HSCT cure models plausible? Is the model structure adequate for decision-making? What is the most plausible ICER? Is liposomal cytarabine and daunorubicin cost-effective?

Liposomal cytarabine and daunorubicin (CPX-351, Jazz Pharmaceuticals) CONFIDENTIAL Liposomal cytarabine and daunorubicin (CPX-351, Jazz Pharmaceuticals) Marketing authorisation Treatment of adults with newly diagnosed, therapy-related AML (t-AML) or AML with myelodysplasia-related changes (AML-MRC) Mechanism of action Liposomal cytarabine and daunorubicin is a liposomal delivery system which uses nanoparticle technology. The liposomes are taken up inside the leukaemic cells where they release a fixed molar ratio of 1:5 of daunorubicin: cytarabine. Administration and dosage Daunorubicin 44 mg/m2 and cytarabine 100 mg/m2, administered intravenously over 90 minutes on days 1, 3, and 5 for the first course of induction therapy and on days 1 and 3 for subsequent courses of induction therapy, if needed. The recommended dosing schedule for consolidation is daunorubicin 29 mg/m2 and cytarabine 65 mg/m2 administered intravenously over 90 minutes on days 1 and 3. List price £4,581 per 50ml vial. The company estimates that XXXXXXXXXXXXXXXX There is a simple discount patient access scheme. NB. Received Promising Innovative Medicine designation from the MHRA in Oct 17 National Institute for Health and Care Excellence Pre-meeting briefing – liposomal cytarabine and daunorubicin for untreated acute myeloid leukaemia Issue date: July 2018

ACD: preliminary recommendation CONFIDENTIAL ACD: preliminary recommendation Liposomal cytarabine and daunorubicin is not recommended, within its anticipated marketing authorisation, for treating newly diagnosed, therapy- related acute myeloid leukaemia or acute myeloid leukaemia with myelodysplasia-related changes in adults National Institute for Health and Care Excellence Pre-meeting briefing – insert title in notes master view Issue date: [Month year]

Conclusions from ACD: Study 301 results: Overall survival CONFIDENTIAL Conclusions from ACD: Study 301 results: Overall survival Median increase in overall survival = 3.61 months ACD conclusion: - liposomal cytarabine and daunorubicin increases overall survival National Institute for Health and Care Excellence Pre-meeting briefing – liposomal cytarabine and daunorubicin for untreated acute myeloid leukaemia Issue date: July 2018

Conclusions from ACD: Overall survival from time of HSCT ACD conclusion: - additional benefit after stem cell transplant lacks clinical plausibility National Institute for Health and Care Excellence Pre-meeting briefing – liposomal cytarabine and daunorubicin for untreated acute myeloid leukaemia Issue date: July 2018

Conclusions from ACD: Company’s model structure [1] Company modelled parametric curves separately by treatment group Overall survival and relapse-free survival outcomes were modelled separately for 3 groups: people in remission who had a stem cell transplant people in remission who did not have a transplant people who were not in remission

Conclusions from ACD: Company’s model structure [2] Post-transplant overall survival extrapolation for people who had a complete response (liposomal cytarabine and daunorubicin group) ACD conclusions about overall survival extrapolation for people in remission who had a stem cell transplant, in the liposomal cytarabine and daunorubicin group: data from Study 301 was not mature enough to justify extrapolation plateau in treatment group appears overly optimistic modelled curve for the comparator group did not reach a plateau (clinical experts said they would expect to see plateau in both groups) ACD conclusion: Committee would prefer to see cure model for the whole population, whether or not they had had a stem cell transplant updated analysis for overall survival based on a more mature data cut of Study 301 survival plateau captured in both groups National Institute for Health and Care Excellence Pre-meeting briefing – liposomal cytarabine and daunorubicin for untreated acute myeloid leukaemia Issue date: July 2018

Committee's further considerations in ACD CONFIDENTIAL Committee's further considerations in ACD Issue Committee's conclusion Event-free survival The whole population should be modelled together, whether or not they had a stem cell transplant Mortality rate after HSCT Mortality rates are higher after stem cell transplant than in the general population and increased mortality rates should be included in the model Utility values Do not have a big effect on the cost-effectiveness results Changes made by ERG: Estimated the mean utility for each treatment phase and applied this utility value to both treatment groups Used utility value of 0.75 from Hensen et al. for post-transplant remission health state Adjusted utility values for ageing Costs and resource use Used alternative method to calculate vial use Reduced the number of hospital days in consolidation period Lowered cost of stem cell transplant (not accepted by committee) End of life Both end of life criteria met. Study 301 results: Median survival in 3+7 group = 5.95 months Median increase in survival with liposomal cytarabine and daunorubicin = 3.61 months National Institute for Health and Care Excellence Pre-meeting briefing – insert title in notes master view Issue date: [Month year]

ACD consultation responses CONFIDENTIAL ACD consultation responses Consultee comments from: Leukaemia Care NCRI-ACP-RCP Jazz Pharmaceuticals Updated analysis of overall survival Implemented a cure model post-HSCT Updated patient access scheme Web comments National Institute for Health and Care Excellence Pre-meeting briefing – insert title in notes master view Issue date: [Month year]

Patient and professional group comments People with high-risk AML currently have limited options Extension to life is significant Liposomal cytarabine and daunorubicin allowed more people to receive stem cell transplant Access through the Cancer Drugs Fund could be considered to provide more long-term data Results of the NCRI AML 18 and 19 trials may be useful (currently recruiting)

Summary of web comments It is clinically plausible that liposomal cytarabine and daunorubicin could offer an improvement in post-transplant survival, although scientific rationale not understood – current trials may explain The 3+7 group may not achieve the same plateau if disease relapse risk of treatment-related mortality is higher Useful, easy to administer and well-tolerated treatment Outcome may be slightly better in younger patients using liposomal cytarabine and daunorubicin because have less expression of MDR gene and fewer comorbidities Reduced cardiotoxicity with liposomal cytarabine and daunorubicin may improve outcomes for older patients in particular

Committee preferences and company’s revised analysis Did company include? Updated analysis for overall survival based on a more mature data cut of Study 301 ✓ (updated trial data) Survival plateau captured in both groups Model based on overall survival data from a more recent data cut of the Study 301 trial x Cure model for the whole population, whether or not they had had a stem cell transplant (no ICER results presented) Company also submitted a revised Patient Access Scheme discount

Company’s new evidence 1a. Updated analysis of overall survival Using drug safety update report data from 3 August 2018

Company’s new evidence 1b Company’s new evidence 1b. Updated analysis of overall survival from time of HSCT Using drug safety update report data from 3 August 2018 Company reports that 8 UK AML experts confirmed the majority of transplant- related mortality and relapse deaths would be expected within first year after transplant Does the additional evidence improve the clinical plausibility of the results?

Company’s new evidence 2. New cure form for post-HSCT survival in model Company based new analysis on ERG base case from first meeting (except alternative cost for HSCT) Used original trial data to extrapolate survival post-HSCT (due to lack of individual patient data for updated KM curves) Compared the extrapolated curves with updated KM curves None of the analyses for 3+7 group converged, so company applied 20% (aligned with updated KM curves) cure fraction manually for this group in the model Fit cure models to liposomal cytarabine and daunorubicin and 3+7 groups separately for post-HSCT overall survival – used in cost-effectiveness results Fit statistical cure model for full ITT populations using original data Used to compare to modelled outcomes and updated KM data Not used in cost-effectiveness results

Company’s new evidence 2 Company’s new evidence 2. Updated extrapolations for post-HSCT overall survival [1] Post-HSCT overall survival extrapolations for liposomal cytarabine and daunorubicin group Scenario a: Original ERG base case (from first meeting) Scenario b: Original ERG base case with Gompertz for liposomal cytarabine and daunorubicin Scenario d: Original ERG base case with cure model for liposomal cytarabine and daunorubicin and 3+7 groups

Post-HSCT overall survival extrapolations for 3+7 group Company’s new evidence 2. Updated extrapolations for post-HSCT overall survival [2] Post-HSCT overall survival extrapolations for 3+7 group Scenario c: Original Gompertz model for 3+7 Scenario d: Original ERG base case with cure model for liposomal cytarabine and daunorubicin and 3+7 groups

Company’s new evidence 2. Updated extrapolations [3] Overall survival extrapolation for full 3+7 group Company comments that the cure method and model projections remain close, suggesting that differences in OS outcomes between the current modelling approach and one based on a cure model of the ITT population would be modest.

Company’s new evidence 2. Updated extrapolations [4] Overall survival extrapolation for full liposomal cytarabine and daunorubicin group Company states that this cure model of OS from the original data set overestimated survival and gave an overly favourable and unrealistic ICER for liposomal cytarabine and daunorubicin – so used cure models for post-HSCT OS instead. Are the post-HSCT cure models plausible? Is the model structure adequate for decision-making?

Company’s updated base case and scenario analyses, including updated PAS Company’s updated base case uses scenario (d): cure model for post-HSCT survival with forced cure fraction for 3+7 group (liposomal cytarabine and daunorubicin and 3+7 groups modelled separately) Also includes 20% of people in model as under 60 years – in original company and ERG base cases, all patients were over 60 Company states this scenario has best fit to trial data and is consistent with literature on post-transplant survival Scenario ICER Population Base case (scenario d) (cure model applied to CPX- 351 and 3+7) £42,681 20% of patients below age 60 Base case with trial population £48,991 All patients > 60 Assuming no cure fraction post-transplant for 3+7 £33,755 20% of patients below age 60 Assuming Gompertz survival function for both groups £46,523* *result omitted from company report - calculated by ERG

ERG comments Clinical data Updated evidence is more robust and reduces uncertainty Post-stem cell transplant cure modelling approach Not clear how general population mortality was taken into account The ERG noted that the cure fractions for liposomal cytarabine and daunorubicin applied in the model were higher than those in the company’s response document and were higher than what might be expected from visual inspection of the Kaplan–Meier curves The 20% cure rate for 3+7 appears to be based on visual inspection, and no other cure fractions were explored – ERG considered 25% → this increases the ICER For liposomal cytarabine and daunorubicin, the cure model curves provide higher survival estimates and produces more life years than all simple parametric curves in the original company model Other modelling scenarios ERG does not consider company’s age adjustment appropriate as it also increases the number of patients who achieve remission (OR = 1.35) – an impact of age on response was not significant in the trial and trial did not include people under 60 ERG considered using a body surface area of 2.0m2 as in the trial instead of 1.83 as in the ERG base case → this increases the ICER

ERG comments Post-HSCT OS for liposomal cytarabine and daunorubicin

ERG comments Post-HSCT OS for 3+7

Key issues for consideration Does the additional evidence improve the clinical plausibility of the results? Are the post-HSCT cure models plausible? Is the model structure adequate for decision-making? What is the most plausible ICER? Is liposomal cytarabine and daunorubicin cost-effective?