Primary Risk Drivers
Below is a snapshot of domains that materially influence the MARA Rating.
Clinical effectiveness
Cabotegravir with rilpivirine demonstrated moderate benefit over current care, showing non-inferiority to oral antiretrovirals in maintaining viral suppression (HIV-1 RNA fewer than 50 copies/ml). The pivotal trials (ATLAS and FLAIR) provided robust evidence, although the margin of benefit is modest, as the treatment is not superior but comparable to existing options.
Cost effectiveness
The cost-effectiveness analysis indicated that cabotegravir with rilpivirine is likely to be a cost-effective use of Healthcare resources, with ICER estimates remaining below £30,000 per QALY gained under the committee’s preferred assumptions. This suggests a clear economic advantage within acceptable thresholds.
Quality of life
The treatment may provide a utility advantage by reducing the stigma associated with daily oral medication and the burden of taking daily tablets. While the evidence for HRQoL improvements is not definitive, the committee acknowledged the potential benefits related to stigma and adherence, suggesting moderate improvements.
Supporting Domains
Safety and Adverse Effects
Cabotegravir with rilpivirine was generally well tolerated in clinical trials, with most adverse events being mild and manageable. Injection site reactions were the most common adverse effects, but they did not significantly undermine the overall safety profile compared to oral ARTs.
Comparator Selection
The company selected relevant oral antiretroviral therapies as comparators, which are commonly used in practice for patients with virological suppression. The committee found this approach appropriate, although some concerns were raised about the exclusion of certain widely prescribed treatments.
Patient Population and Subgroups
The trials included a representative population of adults with HIV-1 who are virologically suppressed, which aligns well with the intended patient population for cabotegravir with rilpivirine. The committee noted that the population was adequately characterized, supporting generalizability.
Care Pathway Integration
The integration of cabotegravir with rilpivirine into existing healthcare pathways may require significant adjustments, including increased clinic visits for administration. While the treatment offers benefits, the need for additional infrastructure and resources raises concerns about its seamless integration.
Resource Use and Cost Implications
The budget impact analysis suggests that while there may be increased costs associated with the implementation of cabotegravir with rilpivirine, the overall resource use is manageable and aligned with Healthcare planning. The potential for cost savings through improved adherence is also noted.
Evidence Quality and Robustness
The evidence base is supported by multiple phase 3 RCTs (ATLAS, FLAIR, and ATLAS-2M) with low bias and consistent results. The committee found the overall quality of evidence robust, although some minor limitations were acknowledged.
Uncertainty, Sensitivity, and Broader Impacts
There are notable uncertainties regarding adherence assumptions and the utility advantage of cabotegravir with rilpivirine. While the committee recognized the potential benefits, the lack of definitive evidence on these aspects introduces a moderate level of uncertainty.
