Primary Risk Drivers
Below is a snapshot of domains that materially influence the MARA Rating.
Clinical effectiveness
The evidence for narsoplimab-wuug shows comparable efficacy to existing options, as indicated by a response rate of 61% in the pivotal study and 68.4% in the expanded access program. However, the absence of randomized controlled trials directly comparing it to standard of care limits the strength of the evidence, leading to a B++ rating.
Cost effectiveness
No cost-effectiveness data, including ICER estimates or economic models, were identified in the retrieved sources. The lack of any economic analysis leads to a C rating for cost-effectiveness.
Quality of life
There is no evidence of health-related quality of life data or patient-reported outcomes for narsoplimab-wuug. The absence of validated instruments or utility values indicates a critical gap in this area, warranting a C rating.
Supporting Domains
Safety and Adverse Effects
The safety profile reported serious adverse reactions in 61% of patients and serious infections in 36%. While there are notable adverse effects, the overall safety profile is acceptable given the context of the patient population, leading to an A rating.
Comparator Selection
The pivotal study lacks a concurrent randomized control arm, relying instead on external controls for comparative efficacy. This suboptimal comparator selection results in a B++ rating.
Patient Population and Subgroups
The trial population includes a diverse range of patients, with some subgroup analyses provided. However, the small sample sizes and limited demographic data for the expanded access cohort introduce some concerns, justifying an A rating.
Care Pathway Integration
The treatment can be integrated into existing pathways with minor adjustments required for administration. This manageable integration leads to an A+ rating.
Resource Use and Cost Implications
There is no data available on the budget impact or resource use implications of narsoplimab-wuug. The absence of any economic analysis results in a C rating.
Evidence Quality and Robustness
The evidence base is primarily derived from a single-arm study and expanded access program, which are considered lower certainty compared to randomized controlled trials. This leads to a B++ rating due to the presence of evidence gaps.
Uncertainty, Sensitivity, and Broader Impacts
There are significant uncertainties regarding the treatment’s long-term effects and economic implications, with no sensitivity analyses provided. This uncertainty leads to a B+ rating.
