Thursday, 10 August 2017 23:38

Breaking News: Study Shows HCV DAA Treatment Demonstrates 57% Survival Benefit

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"To our knowledge, this is the first large-scale study to demonstrate the effect of newer DAA regimens upon survival. Treatment with 2 commonly used DAA regimens, PrOD and LDV/SOF, was associated with significant improvements in survival within the first 18 months of treatment, compared with demographically and clinically similar untreated HCV-infected controls. Treatment with either PrOD or LDV/SOF was associated with a 57% reduction in mortality, and attainment of SVR was associated with a 43% reduction in mortality….Benefits of treatment at a population level are expected to be substantial…..similar benefit can be expected with other DAA-based regimens"

Effect of Paritaprevir/Ritonavir/Ombitasvir/Dasabuvir and Ledipasvir/Sofosbuvir Regimens on Survival Compared With Untreated Hepatitis C Virus–Infected Persons

Adeel Ajwad Butt Peng Yan Tracey G. Simon Abdul-Badi Abou-Samra
Clinical Infectious Diseases, cix364, https://doi.org/10.1093/cid/cix364
Published: 20 July 2017

Abstract

Background

Interferon-based regimens are associated with a substantial survival benefit for persons infected with hepatitis C virus (HCV). Survival data with direct-acting antiviral agents are not available. We conducted this study to quantify the effect of paritaprevir/ritonavir, ombitasvir, dasabuvir (PrOD) and ledipasvir/sofosbuvir (LDV/SOF) regimens upon mortality.

Methods

In the Electronically Retrieved Cohort of HCV Infected Veterans (ERCHIVES), a well-established national cohort of HCV-infected Veterans, we identified HCV-infected persons initiated on PrOD or LDV/SOF, excluding those with human immunodeficiency virus, hepatitis B surface antigen positivity, hepatocellular carcinoma, or missing HCV RNA or FIB-4 scores. For each case, we identified a propensity score–matched control never initiated on treatment. Primary outcome was survival. Outcomes were assessed using frequency of events, Kaplan-Meier curves, and Cox proportional hazards regression analyses.

Results

We identified 1473 persons on PrOD, 5497 on LDV/SOF, and 6970 propensity score–matched untreated persons. Treated persons were more likely to be obese and have cirrhosis, but less likely to have stage 3–5 chronic kidney disease (CKD), alcohol or drug abuse or dependence diagnosis, and anemia. The proportion of persons who died was higher in the untreated group compared with either treatment group (PrOD, 0.3%; LDV/SOF, 1.4%; untreated controls, 2.5%; P < .001). A significantly larger percentage of treated patients survived to 18 months of follow-up, compared with untreated controls (P < .001). In multivariable Cox regression analysis, treatment with either regimen (hazard ratio [HR], 0.43; 95% confidence interval [CI], .33–.57) and attainment of sustained virologic response (SVR) were associated with significantly lower mortality (HR, 0.57; 95% CI, .33–.99).

Conclusions

Treatment with PrOD or LDV/SOF and SVR are associated with a significant mortality benefit, apparent within the first 18 months of treatment.

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