Direct acting antiviral-based treatment of hepatitis C virus infection among people who inject drugs in Georgia: A prospective cohort study

Epidemiological study of hepatitis B and hepatitis C infection in Kohgiluyeh and Boyer-Ahmad province (Iran) from 2008 to 2021: A cross-sectional study

Background and Aims

Viral hepatitis is one of the top five reasons people die from infections all around the world. The present study aimed to assess the epidemiological features of hepatitis B and hepatitis C infections in Kohgiluyeh and Boyer-Ahmad province.

Methods

The data were obtained via the census method from the registered hepatitis B and hepatitis C data in the reportable disease care system of Yasuj University of Medical Sciences. The collected data are the result of serological tests. The χ 2 test was used to evaluate the important risk factors for hepatitis B virus (HBV) and hepatitis C virus (HCV) infection. The joinpoint regression was performed to investigate the trend of HBV and HCV in recent years.

Results

Here, 1270 cases of hepatitis B and C were identified and reported in Kohgiluyeh and Boyer-Ahmad province from 2008 to 2021. The median age of patients was 38 (interquartile range: 31-51), varying significantly according to the type of hepatitis. The most common hepatitis in males was hepatitis C and in females, hepatitis B. Regarding the place of residence, HBV and HCV were both more prevalent in urban areas. The age group of 25-34 years has the highest prevalence of HBV and HCV. According to the joinpoint regression analysis, there is a decrease in the 14-year trend of incidence rate due to total hepatitis B and C: the annual percent change was -5.2% (95% confidence interval [CI]: -8.4 to -1.9, p = 0.005) for hepatitis B and -0.2% (95% CI: -10.7 to 11.6, p = 0.976) for hepatitis C.

Conclusion

This study shows the incidence rate of hepatitis B has been decreasing during the years of study but this trend has been stable for hepatitis C. Also, the highest number of cases of hepatitis B and C were reported in the age groups of 25-34 years. Hence, preventive interventions are vital in reducing the burden of these diseases.

A community-based strategy to eliminate hepatitis C among people who inject drugs in Vietnam

Background

Towards hepatitis C elimination among people who inject drugs (PWID), we assessed the effectiveness of a strategy consisting of a community-based respondent-driven sampling (RDS) as wide screening, a simplified and integrated hospital-based care, and prevention of reinfection supported by community-based organisations (CBO), in Hai Phong, Vietnam.

Methods

Adults who injected heroin were enrolled in a RDS survey implemented in two CBO premises. Rapid HIV and HCV tests were done on site, and blood was taken for HCV RNA testing. Those with detectable HCV RNA were referred with CBO support to three public hospitals for 12-week sofosbuvir/daclatasvir, plus ribavirin for patients with cirrhosis. Participants were followed-up 12 weeks post-treatment (SVR12) and 48 weeks after enrolment. The primary endpoint was the rate of undetectable HCV RNA participants at 48 weeks.

Findings

Among the 1444 RDS survey participants, 875 had hepatitis C. Their median age was 41 years (IQR 36-47), 96% were males, 36% were HIV-coinfected. Overall, 686 (78.4%) started sofosbuvir/daclatasvirs, and 629 of the 647 (97.2%) patients tested at SVR12 were cured. At week 48 (581/608) 95.6% had undetectable HCV RNA, representing 66.4% of all PWID identified with hepatitis C. The reinfection rate after SVR12 was 4/100 person-years (95% CI: 2-7).

Interpretation

Our strategy, involving CBO and addressing all steps from wide HCV screening to prevention of reinfection, stands as a promising approach to eliminate HCV among PWID in low and middle-income countries.

Funding

France ANRS|MIE (#ANRS12380). The RDS survey was implemented with grants from the NIDA (#R01DA041978) and ANRS|MIE (#ANRS12353).

Barriers of linkage to HCV viremia testing among people who inject drugs in Georgia

Background

People who inject drugs (PWID) in Georgia have a high prevalence of hepatitis C virus antibody (anti-HCV). Access to care among PWID could be prioritized to meet the country’s hepatitis C elimination goals. This study assesses barriers of linkage to HCV viremia testing among PWID in Georgia.

Methods

Study participants were enrolled from 13 harm reduction (HR) centers throughout Georgia. Anti-HCV positive PWID who were tested for viremia (complete diagnosis [CD]), were compared to those not tested for viremia within 90 days of screening anti-HCV positive (not complete diagnosis [NCD]). Convenience samples of CD and NCD individuals recorded at HR centers using beneficiaries’ national ID were drawn from the National HCV Elimination Program database. Participants were interviewed about potential barriers to seeking care.

Results

A total of 500 PWID were enrolled, 245 CD and 255 NCD. CD and NCD were similar with respect to gender, age, employment status, education, knowledge of anti-HCV status, and confidence/trust in the elimination program (p > 0.05). More NCD (13.0%) than CD (7.4%) stated they were not sufficiently informed what to do after screening anti-HCV positive (p < 0.05). In multivariate analysis, HCV viremia testing was associated with perceived affordability of the elimination program (adjusted prevalence ratio = 8.53; 95% confidence interval: 4.14–17.62).

Conclusions

Post testing counselling and making hepatitis C services affordable could help increase HCV viremia testing among PWID in Georgia.

An intensive model of care for hepatitis C virus screening and treatment with direct-acting antivirals in people who inject drugs in Nairobi, Kenya: a model-based cost-effectiveness analysis

BACKGROUND AND AIMS

Hepatitis C virus (HCV) treatment is essential for eliminating HCV in people who inject drugs (PWID), but has limited coverage in resource-limited settings. We measured the cost-effectiveness of a pilot HCV screening and treatment intervention using directly observed therapy among PWID attending harm reduction services in Nairobi, Kenya.

DESIGN

We utilized an existing model of HIV and HCV transmission among current and former PWID in Nairobi to estimate the cost-effectiveness of screening and treatment for HCV, including prevention benefits versus no screening and treatment. The cure rate of treatment and costs for screening and treatment were estimated from intervention data, while other model parameters were derived from literature. Cost-effectiveness was evaluated over a life-time horizon from the health-care provider's perspective. One-way and probabilistic sensitivity analyses were performed.

SETTING

Nairobi, Kenya.

POPULATION

PWID.

MEASUREMENTS

Treatment costs, incremental cost-effectiveness ratio (cost per disability-adjusted life year averted).

FINDINGS

The cost per disability-adjusted life-year averted for the intervention was $975, with 92.1% of the probabilistic sensitivity analyses simulations falling below the per capita gross domestic product for Kenya ($1509; commonly used as a suitable threshold for determining whether an intervention is cost-effective). However, the intervention was not cost-effective at the opportunity cost-based cost-effectiveness threshold of $647 per disability-adjusted life-year averted. Sensitivity analyses showed that the intervention could provide more value for money by including modelled estimates for HCV disease care costs, assuming lower drug prices ($75 instead of $728 per course) and excluding directly-observed therapy costs.

CONCLUSIONS

The current strategy of screening and treatment for hepatitis C virus (HCV) among people who inject drugs in Nairobi is likely to be highly cost-effective with currently available cheaper drug prices, if directly-observed therapy is not used and HCV disease care costs are accounted for.

Association Between Opioid Agonist Therapy and Testing, Treatment Uptake, and Treatment Outcomes for Hepatitis C Infection Among People Who Inject Drugs: A Systematic Review and Meta-analysis

BACKGROUND

People who inject drugs (PWID) experience barriers to accessing testing and treatment for hepatitis C virus (HCV) infection. Opioid agonist therapy (OAT) may provide an opportunity to improve access to HCV care. This systematic review assessed the association of OAT and HCV testing, treatment, and treatment outcomes among PWID.

METHODS

Bibliographic databases and conference presentations were searched for studies that assessed the association between OAT and HCV testing, treatment, and treatment outcomes (direct-acting antiviral [DAA] therapy only) among PWID (in the past year). Meta-analysis was used to pool estimates.

RESULTS

Of 9877 articles identified, 22 studies conducted in Australia, Europe, North America, and Thailand were eligible and included. Risk of bias was serious in 21 studies and moderate in 1 study. Current/recent OAT was associated with an increased odds of recent HCV antibody testing (4 studies; odds ratio (OR), 1.80; 95% confidence interval [CI], 1.36-2.39), HCV RNA testing among those who were HCV antibody-positive (2 studies; OR, 1.83; 95% CI, 1.27-2.62), and DAA treatment uptake among those who were HCV RNA-positive (7 studies; OR, 1.53; 95% CI, 1.07-2.20). There was insufficient evidence of an association between OAT and treatment completion (9 studies) or sustained virologic response following DAA therapy (9 studies).

CONCLUSIONS

OAT can increase linkage to HCV care, including uptake of HCV testing and treatment among PWID. This supports the scale-up of OAT as part of strategies to enhance HCV treatment to further HCV elimination efforts.

Hepatitis C treatment uptake among patients who have received methadone substitution treatment in the Republic of Georgia

OBJECTIVES

There is a dearth of research on hepatitis C virus (HCV) treatment uptake among people who inject drugs (PWIDs) and receive methadone substitution treatment (MST) in Eastern Europe and Central Asia countries. This study contributed to addressing that gap. We examined and identified factors that may affect HCV treatment uptake among PWID who received MST in the Republic of Georgia.

STUDY DESIGN

The design of the study is retrospective cohort study.

METHODS

We conducted HCV care cascade analysis by matching the data from the web-based national hepatitis C program registry (ELIM C) and the MST treatment database between January 1, 2015, and December 31, 2018. Using the World Health Organization's (WHO) Consensus HCV cascade of care (CoC) global instrument, we assessed the progress made toward the country's 2020 and WHO's 2030 hepatitis C elimination targets for the subpopulation of MST patients.

RESULTS

Overall, 10,498 individuals have been dispensed methadone during the study period. A total of 6828 MST beneficiaries had HCV screening, of whom 5843 (85.6%) tested positive; 5476 (93.7%) were tested for HCV viremia, and 5275 (96.3%) were confirmed with chronic HCV infection. More than 75% (n = 4000) of HCV-infected MST patients initiated HCV treatment, and 3772 (94.3%) completed the treatment. Of those eligible for sustained virologic response assessment, 71.0% (2641/3715) were evaluated, and the reported cure rate was 96.1% (2537). The study found the odds of patients starting HCV treatment differed by the type of facility they were screened at and whether they were registered as PWID at the screening sites. The patients screened at centers with integrated HCV treatment services had higher treatment uptake rates than those screened at other centers.

CONCLUSIONS

As the cumulative HCV treatment uptake and cure rates among MST patients with HCV infection are high (75.8% and 96.1%, respectively), the MST patients might become the first microelimination target population in which hepatitis C elimination will be achieved in Georgia. The study found the type of screening facility and whether MST patients registered themselves as PWID or not had significant effects on MST patients starting HCV treatment. At the same time, the study did not find gender and age to be significant predictors of MST patients starting HCV treatment. MST patients used different types of health facilities to get screened for HIV. Many of them did not register themselves as PWID when screened for HIV. The existence of only a few harm reduction sites with integrated HCV treatment services, a high level of stigma, and the criminalization of drug use might have incentivized MST patients to self-navigate across the HCV care continuum with the rest of the population. The implementation of focused, harm reduction, integrated HCV treatment with good peer and professional adherence support at treatment sites could help reach the hepatitis C elimination goals among MST patients.

Age and gender-specific hepatitis C continuum of care and predictors of direct acting antiviral treatment among persons who inject drugs in Seattle, Washington

BACKGROUND

Direct acting antivirals (DAAs) have revolutionized management of hepatitis C virus (HCV), but treatment uptake remains low among persons who inject drugs (PWID). We report the continuum of care for HCV and describe predictors of treatment with DAAs among PWID in Seattle.

METHODS

We analyzed data from the 2018 Seattle area National HIV Behavioral Surveillance (NHBS) survey of PWID. Persons ≥18 years of age who injected drugs in the past year and completed the core NHBS survey, a local survey supplement, and rapid HCV antibody testing were included. Among those who screened HCV antibody positive, we calculated proportions and 95 % confidence intervals for self-reported steps along the HCV care continuum. Multivariable logistic regression was used to calculate the adjusted odds (AOR) of having received DAA therapy.

RESULTS

The sample included 533 PWID, 376 (71 %) of whom tested positive for antibodies to HCV. Among those who were HCV antibody positive, 94 % reported any prior HCV test, 81 % reported a prior confirmatory test, and 68 % reported a prior HCV diagnosis. Of those diagnosed, 26 % had undergone treatment and 18 % had been cured. In a multivariate model, being one year older (AOR 1.05 per year, 1.01-1.08) was predictive of DAA treatment, while homelessness (AOR 0.39, 0.19-0.80) and female gender (AOR 0.36, 0.16-0.78) were associated with a lower odds of DAA therapy.

CONCLUSIONS

Despite widespread HCV testing among PWID in Seattle, treatment uptake remains low in the DAA era. In particular, treatment of women, younger adults and persons living homeless is lagging behind.

Patient Centeredness in Hepatitis C Direct-Acting Antiviral Treatment Delivery to People Who Inject Drugs: A Scoping Review

Background and Objective

Patient-centered care (PCC) is crucial for value-based care. We aimed to assess PCC dimensions addressed in hepatitis C virus direct-acting antiviral treatment delivery to people who inject drugs.

Methods

We conducted a scoping review to identify the studies that described hepatitis C virus treatment delivery to people who inject drugs in the direct-acting antiviral treatment era. We analyzed the included studies against eight PCC dimensions: (1) access to care; (2) coordination and integration of care; (3) continuity and translation; (4) physical comfort; (5) information, education, and communication; (6) emotional support; (7) involvement of family and friends; and (8) respect for individual patient preferences, perceived needs, and values. Additionally, we assessed the use of patient-centered terminology and the recognition of PCC importance and its relevance to treatment outcomes.

Results

None of the identified 36 studies addressed all PCC dimensions (highest seven, lowest two). Our findings revealed that PCC dimensions are prioritized differently and addressed using different approaches and strategies. Studies that used PCC terminology referred to personalized activities, which does not imply comprehensive PCC. About one-third of the studies acknowledged the importance of patient centeredness and two-thirds recognized its relevance to treatment outcomes.

Conclusions

Our findings suggest more engagement of people who inject drugs and comprehensive involvement of their families and friends in hepatitis C virus treatment journey, decisions, and outcomes. The recognition of PCC importance and its relevance to treatment outcomes in the analyzed studies emphasizes the need for more patient-centered hepatitis C virus treatment for people who inject drugs.

Supplementary Information

The online version contains supplementary material available at 10.1007/s40271-020-00489-6.

A systematic review and meta-analysis of the prevalence of hepatitis C virus infection in people who inject drugs in Iran

BACKGROUND

Hepatitis C virus (HCV) infection is one of the major public health challenges generating a relevant burden. High-risk groups, including people who inject drugs (PWID), are at serious risk for developing HCV. In recent years, several investigations have been conducted in Iran to assess the prevalence e of HCV among PWID. The aim of the present study was to synthesize the literature performing a comprehensive search and meta-analysis.

METHODS

A comprehensive literature search was carried out from January 2000 to September 2019. Several international databases, namely Scopus, PubMed/MEDLINE, Embase, ISI/Web of Science, PsycINFO, CINAHL, the Cochrane Library and the Directory of Open Access Journals (DOAJ), as well as Iranian databases (Barakathns, SID and MagIran), were consulted. Eligible studies were identified according to the following PECOS (population, exposure, comparison/comparator, outcome and study type) criteria: i) population: Iranian population; ii) exposure: injection drug users; iii) comparison/comparator: type of substance injected and level of substance use, iv) outcome: HCV prevalence; and v) study type: cross-sectional study. After finding potentially related studies, authors extracted relevant data and information based on an ad hoc Excel spreadsheet. Extracted data included the surname of the first author, the study journal, the year of publication, the number of participants examined, the type of diagnostic test performed, the number of positive HCV patients, the number of participants stratified by gender, the reported prevalence, the duration of drug injection practice and the history of using a shared syringe.

RESULTS

Forty-two studies were included. 15,072 PWID were assessed for determining the prevalence of HCV. The overall prevalence of HCV among PWID in Iran was computed to be 47% (CI 95: 39-56). The prevalence ranged between 7 and 96%. Men and subjects using a common/shared syringe were 1.46 and 3.95 times more likely to be at risk, respectively.

CONCLUSION

The findings of the present study showed that the prevalence of HCV among PWIDs in Iran is high. The support and implementation of ad hoc health-related policies and programs that reduce this should be put into action.