Contribution of cabotegravir + rilpivirine long-acting for the treatment of HIV-1 infection

Abstract

ObjectiveTo determine the value contribution of cabotegravir + rilpivirine, the first injectable every two months long-acting antiretroviral regimen, using multi-criteria decision analysis. MethodThe study was developed in two phases. After a small pilot, a field work study with a larger number of multidisciplinary experts was carried out. Seven single-tablet regimens, currently recommended by the GeSIDA guidelines, were selected as comparators. EVIDEM methodology was followed, with a framework composed by 12 quantitative and 5 contextual criteria. Mean and standard deviations were calculated for quantitative criteria (1 to 5 scale; comparative criteria -5 to +5), whereas qualitative criteria were analyzed as percentages of experts that considered a positive, neutral or negative impact for the National Health System. Results: 35 experts participated in the study. Human immunodeficiency virus-1 infection was considered severe (mean ± standard deviation: 3.0 ± 1.0), with moderate size of affected population (2.7 ± 1.2) and unmet needs (2.8 ± 1.0). Minimal differences were found in comparative efficacy/effectiveness (0.1 ± 0.5), safety/tolerability (-0.5 ± 0.7), and cost criteria: cost of the intervention (0.5 ± 2.0), other medical costs (0.2 ± 1.8) and non-medical/indirect costs (0.5 ± 1.6). Experts perceived an improvement with cabotegravir + rilpivirine long-acting, compared to current daily oral single-tablet regimens, in patient-reported outcomes (2.7 ± 1.4). Therapeutic benefit of the long-acting regimen was considered moderate-to-high (3.5 ± 1.2). Experts considered the evidence provided by cabotegravir + rilpivirine long-actingrobust (4.3 ± 0.8), with elevated consensus on its future recommendation in guidelines (3.2 ± 1.0). In contextual criteria, most experts considered positive the impact on population priorities and access (91%), common goal and specific interests (63%) and political, historical, and cultural context criteria (60%). Impact was neutral in system capacity and appropriate use (40%), and opportunity costs and affordability criteria (51%). Result of the weighted global value contribution of cabotegravir + rilpivirine long-acting was 0.34 (-1 to +1 scale), with Patient Reported Outcomes comparative criterion bringing the highest added value. ConclusionsCabotegravir + rilpivirine long-acting provides added value contribution to human immunodeficiency virus-1 management in Spain compared to daily oral single-tablet regimens. Patient Reported Outcomes and therapeutic benefit of cabotegravir + rilpivirine long-acting were highly valued by experts, as the expected benefit in adherence and stigma-related issues would improve overall quality of life for people living with human immunodeficiency virus-1.