Primary Risk Drivers
Below is a snapshot of domains that materially influence the MARA Rating.
Clinical effectiveness
The clinical trial evidence from the PROpel study demonstrates that olaparib with abiraterone significantly improves overall survival (OS) and progression-free survival (PFS) compared to abiraterone alone. The results indicate a clear clinical advantage, particularly in the BRCA mutation subgroup, although the overall survival benefit in the intention-to-treat (ITT) population is modest. The evidence is compelling enough to support a strong recommendation.
Cost effectiveness
The cost-effectiveness estimates for olaparib with abiraterone are within the acceptable range for Healthcare resources, with ICERs reported to be less than £30,000 per QALY gained. This indicates a strong economic value proposition for the treatment, justifying its use in the specified patient population.
Quality of life
The trial included health-related quality of life assessments, which indicated improvements in quality of life metrics, particularly due to the extended time before disease progression. While the improvements are moderate, they are significant enough to suggest a positive impact on patient well-being.
Supporting Domains
Safety and Adverse Effects
The safety profile of olaparib with abiraterone is acceptable, with mostly mild to moderate adverse events reported. Serious adverse events are rare, and the overall tolerability is good, supporting its use in the target population.
Comparator Selection
The treatment was compared against appropriate standard-of-care alternatives, specifically abiraterone and enzalutamide, which are relevant and commonly used in clinical practice. This strengthens the validity of the evidence presented.
Patient Population and Subgroups
The trial population is broadly representative of the intended patient population, with subgroup analyses conducted for key demographics, including those with BRCA mutations. However, there are some limitations in subgroup representation that prevent a higher rating.
Care Pathway Integration
Olaparib with abiraterone can be integrated into existing treatment pathways with minor adjustments, as it is an oral therapy that does not require significant changes to current clinical practices. This facilitates its adoption in routine care.
Resource Use and Cost Implications
The resource implications of implementing olaparib with abiraterone are manageable, with the potential for cost savings due to improved patient outcomes and reduced need for subsequent treatments. This aligns with Healthcare budget considerations.
Evidence Quality and Robustness
The evidence base is robust, supported by a Phase 3 RCT with a large sample size (n=796) and low risk of bias. The findings are consistent across various analyses, enhancing the credibility of the results.
Uncertainty, Sensitivity, and Broader Impacts
While there are some uncertainties regarding the long-term outcomes and the subsequent use of olaparib monotherapy, these are mitigated by the strong clinical need and the favorable context of the treatment’s introduction. The overall impact on health equity is positive.
