Primary Risk Drivers
Below is a snapshot of domains that materially influence the MARA Rating.
Clinical effectiveness
The clinical evidence from the CLARITY and CLARITY-EXT trials demonstrates a clear clinical advantage for cladribine, showing a statistically significant 58% reduction in annualized relapse rate (ARR) compared to placebo, along with a delay in time to first relapse. However, while indirect comparisons suggest comparable efficacy to high-efficacy therapies like ocrelizumab and ofatumumab, the lack of direct head-to-head trials introduces some uncertainty.
Cost effectiveness
The economic model indicates that cladribine is cost-effective compared to high-efficacy DMTs, with the most likely ICER falling within acceptable thresholds for Healthcare resources. The committee concluded that cladribine is cost-saving while providing fewer QALYs than comparators, which supports its recommendation.
Quality of life
Patient experts reported that cladribine significantly improves quality of life by reducing treatment burden and allowing better life planning, such as family planning and work commitments. While the evidence is primarily anecdotal, it aligns with the observed clinical benefits, indicating moderate improvements in HRQoL.
Supporting Domains
Safety and Adverse Effects
Cladribine has an acceptable safety profile with manageable adverse events. The clinical experts noted that the treatment is well-tolerated, and the evidence supports its safety compared to existing therapies, although some adverse events were reported.
Comparator Selection
The committee identified ocrelizumab and ofatumumab as the most relevant comparators for cladribine, aligning with clinical practice. While other treatments were considered, the focus on high-efficacy DMTs ensures that the comparisons are appropriate and relevant.
Patient Population and Subgroups
The trial population for cladribine is representative of the intended patient population with active relapsing forms of MS. The committee noted that the evidence adequately covers the core population, although some subgroup analyses could be improved.
Care Pathway Integration
Cladribine’s oral administration and low monitoring requirements facilitate its integration into existing care pathways, particularly benefiting patients who face challenges in accessing treatment. The committee recognized these practical advantages in its decision-making.
Resource Use and Cost Implications
The budget impact analysis indicates that cladribine has a manageable cost burden, with the potential for cost savings in the Healthcare. The committee’s preferred assumptions support the conclusion that cladribine is resource-efficient.
Evidence Quality and Robustness
The evidence base is primarily derived from robust RCTs (CLARITY and CLARITY-EXT), although the reliance on indirect comparisons introduces some limitations. Overall, the evidence is credible and supports the conclusions drawn.
Uncertainty, Sensitivity, and Broader Impacts
While there are uncertainties related to the economic model and treatment assumptions, the committee found these manageable within the context of the unmet need for effective MS treatments. The societal context supports the use of cladribine.
