Cost-effectiveness of hepatitis B vaccination of prison inmates

RISE-Vac-Co-production of Vaccine Education Materials with Persons Living in Prison

Increasing vaccination knowledge is effective in addressing hesitancy and is particularly important in populations deprived of liberty who may not routinely have access to health information, ensuring health equity. RISE-Vac is a European Union-funded project aiming to promote vaccine literacy, offer, and uptake in prisons in Europe. We consulted persons living in prisons in the United Kingdom (through the Prisoner Policy Network), France, and Moldova to determine their vaccination knowledge gaps, the information they would like to receive, and how they would like to receive it. We received 344 responses: 224 from the United Kingdom, 70 from France, and 50 from Moldova. Participants were particularly interested in learning about the effectiveness, side effects, and manufacturing of vaccines. Their responses guided the development of educational materials, including a brochure that will be piloted in prisons in Europe. Persons with experience of imprisonment were involved at every stage of this project.

Heterogeneity in Jail Nursing Medical Intake Forms: A Content Analysis

Despite high prevalence of infectious diseases and substance use disorders in jails, there are limited guidelines for the nursing intake process in this setting. We performed a content analysis of nursing intake forms used at each of the 14 Massachusetts county jails, focusing on infectious disease and substance use disorder. Only 85% of jails offered HIV testing during nursing intake and 50% of jails offered hepatitis C testing. Preventive interventions such as vaccines or pre-exposure prophylaxis therapy were infrequently offered during nursing intake. Screening for substance use disorder was present on the majority of intake forms, but only 23% of intake forms inquired about ongoing medication-assisted treatment for opioid use disorder. The results reflect heterogeneity in nursing intake forms, highlighting missed opportunities for public health interventions.

Immunization Coverage of Inmates in Spanish Prisons

The correct immunization of the inmate population minimizes the risk of transmission of vaccine-preventable diseases in prisons. The objective of this study was to evaluate the vaccine coverage of long-term prisoners in the Spanish penitentiary system through a retrospective longitudinal study. One-thousand and five prisoners were selected, who were imprisoned from 2008 and 2018 in three Spanish prisons. Their degree of immunization was evaluated as related to hepatitis A (HAV), hepatitis B (HBV), tetanus, diphtheria, pneumococcus and seasonal flu. The state of vaccination of the prisoners with a serological diagnosis of HBV, hepatitis C (HCV) and human immunodeficiency virus (HIV) was also evaluated. The vaccination coverage obtained for hepatitis B was 52.3%, and for tetanus–diphtheria, it was 71.9%. However, for hepatitis A and pneumococcus infection, it was insignificant (<2% of the prisoners). Vaccination against seasonal flu was lower than 16%. The HCV and HIV-positive inmates were not correctly vaccinated either. The insufficient level of immunization obtained reflects the lack of interest and marginalization of this population by the penitentiary system and the health authorities. The lack of reliable records is combined with the lack of planned strategies that promote stable and well-defined programs of active vaccination.

Vaccinations in prison settings: A systematic review to assess the situation in EU/EEA countries and in other high income countries

INTRODUCTION

In 2016, more than 600,000 persons were being held in EU/EEA correctional facilities on a given day. People in prison may be at risk of vaccine-preventable diseases. While vaccination recommendations for people in prison exist, little is known on coverage and implementation options.

METHODS

We performed a systematic review on existing evidence on vaccination in prison settings in the EU/EEA. We searched peer-reviewed and grey literature following international methodology and reporting standards, to gather records published between 1980 and 2016 in all languages. We analysed quantitative (acceptance, uptake, cost-effectiveness) and qualitative (barriers) outcomes.

RESULTS

Out of 7041 identified records, 19 full-text articles were included from peer-reviewed literature and two from grey literature. Of these, 18 reported on hepatitis A and/or B virus (HAV/HBV), two on influenza and one on MMR vaccination. Two studies on HAV vaccine reported varying acceptance (5-91%) and uptake rates (62.9-70.5%). Seven studies reported on HBV vaccination. A comparative study showed a significantly higher uptake of the third HBV vaccine dose with the very rapid (63%) compared to the standard schedule (20%). HBV vaccination was generally well accepted (54-100%), whereas uptake was variable (dose 1:23-100%, dose 2:48-92%, dose 3:19-80%). One study on the combined HAV/HBV vaccine reported an acceptance rate of 34%, and declining uptake following dose 1. One study on influenza vaccine showed an uptake of 42-46%, while another reported a MMR vaccine acceptance of 80% and an uptake of 74%. Overall, main reasons for non-vaccination included release from/or transfer between prisons, and refusal.

CONCLUSIONS

This systematic review highlighted important knowledge gaps and operational challenges for vaccination in prison settings. Vaccination is an effective measure that warrants comprehensive and tailored implementation to reduce the preventable disease burden, avoid risks of large outbreaks of vaccine-preventable diseases, and contribute to health equity for people in prison.

Cost-effectiveness of Hepatitis B Virus Infection Screening and Treatment or Vaccination in 6 High-risk Populations in the United States

Background

Two million individuals with chronic hepatitis B (CHB) in the United States are at risk for premature death due to liver cancer and cirrhosis. CHB can be prevented by vaccination and controlled with treatment.

Methods

We created a lifetime Markov model to estimate the cost-effectiveness of strategies to prevent or treat CHB in 6 high-risk populations: foreign-born Asian/Pacific Islanders (API), Africa-born blacks (AbB), incarcerated, refugees, persons who inject drugs (PWID), and men who have sex with men (MSM). We studied 3 strategies: (a) screen for HBV infection and treat infected ("treatment only"), (b) screen for HBV susceptibility and vaccinate susceptible ("vaccination only"), and (c) screen for both and follow-up appropriately ("inclusive"). Outcomes were expressed in incremental cost-effectiveness ratios (ICERs), clinical outcomes, and new infections.

Results

Vaccination-only and treatment-only strategies had ICERs of $6000-$21 000 per quality-adjusted life-year (QALY) gained, respectively. The inclusive strategy added minimal cost with substantial clinical benefit, with the following costs per QALY gained vs no intervention: incarcerated $3203, PWID $8514, MSM $10 954, AbB $17 089, refugees $17 432, and API $18 009. Clinical complications dropped in the short/intermediate (1%-25%) and long (0.4%-16%) term. Findings were sensitive to age, discount rate, health state utility in immune or susceptible stages, progression rate to cirrhosis or inactive disease, and tenofovir cost. The probability of an inclusive program costing <$50 000 per QALY gained varied between 61% and 97% by population.

Conclusions

An inclusive strategy to screen and treat or vaccinate is cost-effective in reducing the burden of hepatitis B virus among all 6 high-risk, high-prevalence populations.

Cost-effectiveness of adult vaccinations: A systematic review

BACKGROUND

Coverage levels for many recommended adult vaccinations are low. The cost-effectiveness research literature on adult vaccinations has not been synthesized in recent years, which may contribute to low awareness of the value of adult vaccinations and to their under-utilization. We assessed research literature since 1980 to summarize economic evidence for adult vaccinations included on the adult immunization schedule.

METHODS

We searched PubMed, EMBASE, EconLit, and Cochrane Library from 1980 to 2016 and identified economic evaluation or cost-effectiveness analysis for vaccinations targeting persons aged ≥18 years in the U.S. or Canada. After excluding records based on title and abstract reviews, the remaining publications had a full-text review from two independent reviewers, who extracted economic values that compared vaccination to "no vaccination" scenarios.

RESULTS

The systematic searches yielded 1688 publications. After removing duplicates, off-topic publications, and publications without a "no vaccination" comparison, 78 publications were included in the final analysis (influenza = 25, pneumococcal = 18, human papillomavirus = 9, herpes zoster = 7, tetanus-diphtheria-pertussis = 9, hepatitis B = 9, and multiple vaccines = 1). Among outcomes assessing age-based vaccinations, the percent indicating cost-savings was 56% for influenza, 31% for pneumococcal, and 23% for tetanus-diphtheria-pertussis vaccinations. Among age-based vaccination outcomes reporting $/QALY, the percent of outcomes indicating a cost per QALY of ≤$100,000 was 100% for influenza, 100% for pneumococcal, 69% for human papillomavirus, 71% for herpes zoster, and 50% for tetanus-diphtheria-pertussis vaccinations.

CONCLUSIONS

The majority of published studies report favorable cost-effectiveness profiles for adult vaccinations, which supports efforts to improve the implementation of adult vaccination recommendations.

Hepatitis B prevalence, risk factors, infection awareness and disease knowledge among inmates: a cross-sectional study in Switzerland's largest pre-trial prison

Background

Hepatitis B virus (HBV) is a major health concern in prison, but data are scarce in European prisons. This study aims to measure the prevalence of HBV infection, risk factors, awareness about infection, and HBV knowledge among inmates in Switzerland’s largest pre-trial prison.

Methods

Serological blood tests (HBsAg, anti-HBs, and anti-HBc) and a standardized socio-demographic and sexual health survey were offered to consenting prisoners in 2009 and 2011. HBV knowledge was assessed using a standardized questionnaire among participants recruited in 2009.

Findings

A total of 273 male participants were included in the study (116 participants answered the HBV knowledge survey), with 38.1% originating from Eastern Europe, 28.2% from sub-Saharan Africa, 14.3% from North Africa, and 9.5% from Latin America. The prevalence of anti-HBc (resolved/chronic infection) was 38.2% and the prevalence of HBsAg (chronic infection) was 5.9%; 14% of participants had vaccine-acquired immunity (anti-HBs positive/anti-HBc negative). We estimated that 15.5% of people living in Geneva having chronic infection go through the Geneva’s prison. Region of origin was significantly associated with chronic/resolved HBV infection (P < 0.001): 72.2% of participants from sub-Saharan African, 34.6% from Eastern Europe and 13.2% from other regions. In terms of chronic infection, 15.6% of participants from sub-Saharan Africa were positive for HBsAg, vs 2% of those from other regions (P < 0.001). In stratified analyses, region of origin remained significantly associated with HBV infection. Among those with chronic infection, only 12.5% were aware of their status. A minority of inmates knew how HBV could be transmitted.

Conclusions

The primary factor associated with HBV infection in this study was the geographical region of origin of participants. Given the high HBV prevalence found in this prison population, a targeted testing and vaccination approach based on prisoners’ region of origin would be a cost-effective strategy when resources are limited. Additionally, identification of at-risk people should not rely on sensitive questions nor self-reported history of HBV. An inclusive approach to global health needs to incorporate prison population, as incarcerated people have a disproportionate burden of HBV infection and because an important proportion of hard-to-reach chronic HBV infected people go through the incarceration system.

Global burden of HIV, viral hepatitis, and tuberculosis in prisoners and detainees

The prison setting presents not only challenges, but also opportunities, for the prevention and treatment of HIV, viral hepatitis, and tuberculosis. We did a comprehensive literature search of data published between 2005 and 2015 to understand the global epidemiology of HIV, hepatitis C virus (HCV), hepatitis B virus (HBV), and tuberculosis in prisoners. We further modelled the contribution of imprisonment and the potential impact of prevention interventions on HIV transmission in this population. Of the estimated 10·2 million people incarcerated worldwide on any given day in 2014, we estimated that 3·8% have HIV (389 000 living with HIV), 15·1% have HCV (1 546 500), 4·8% have chronic HBV (491 500), and 2·8% have active tuberculosis (286 000). The few studies on incidence suggest that intraprison transmission is generally low, except for large-scale outbreaks. Our model indicates that decreasing the incarceration rate in people who inject drugs and providing opioid agonist therapy could reduce the burden of HIV in this population. The prevalence of HIV, HCV, HBV, and tuberculosis is higher in prison populations than in the general population, mainly because of the criminalisation of drug use and the detention of people who use drugs. The most effective way of controlling these infections in prisoners and the broader community is to reduce the incarceration of people who inject drugs.

Vaccinations in prisons: A shot in the arm for community health

From the first day of imprisonment, prisoners are exposed to and expose other prisoners to various communicable diseases, many of which are vaccine-preventable. The risk of acquiring these diseases during the prison sentence exceeds that of the general population. This excess risk may be explained by various causes; some due to the structural and logistical problems of prisons and others to habitual or acquired behaviors during imprisonment. Prison is, for many inmates, an opportunity to access health care, and is therefore an ideal opportunity to update adult vaccination schedules. The traditional idea that prisons are intended to ensure public safety should be complemented by the contribution they can make in improving community health, providing a more comprehensive vision of safety that includes public health.

Hepatitis B virus screening before adjuvant chemotherapy in patients with early-stage breast cancer: a cost-effectiveness analysis

Most patients with hepatitis B virus (HBV) have no symptoms, and many are unaware of the infection. However, HBV can reactivate with immunosuppression; chemotherapy causes reactivation in 22 % of hepatitis B surface antigen-positive patients. HBV reactivation can be fatal. HBV reactivation can be prevented, provided that HBV is recognized prior to chemotherapy. The objective of this study is to estimate the health and economic effects of HBV screening strategies in patients receiving adjuvant chemotherapy for breast cancer. We developed a state-transition microsimulation model to examine the cost-effectiveness of three HBV screening strategies: (1) "No screening"; (2) "Screen-and-Treat to prevent reactivation" (screen-all) with either lamivudine/tenofovir (LAM/TDF) or entecavir (ETV); and (3) "Screen-and-Treat high-risk only" (screen-HR) and treat with either LAM/TDF or ETV. Model data were obtained from the published literature. We used a payer's perspective, a lifetime horizon, and a 5 % discount rate for the analysis. "Screen-all" would prevent at least 38 severe reactivations per 100,000 persons screened over the lifetime of the cohort. "Screen-all" was associated with an increase of 0.0034-0.0035 QALYs and an additional cost of C$164-C$266 per person, which translated into an incremental cost-effectiveness ratio of C$47,808/QALY-C$76,527/QALY gained compared with "No screening" depending on the antiviral therapy received. "Screen-all" was the most cost-effective strategy, while "Screen-HR" was inferior in all scenarios tested. HBV screening before adjuvant chemotherapy for breast cancer patients would prevent a significant number of reactivations, would likely be moderately cost-effective, and may extend the lives of breast cancer patients.

Cost-effectiveness analysis of the national Perinatal Hepatitis B Prevention Program

OBJECTIVE

To analyze the cost-effectiveness of the national Perinatal Hepatitis B Prevention Program (PHBPP) over the lifetime of the 2009 US birth cohort and compare the costs and outcomes of the program to a scenario without PHBPP support. PHBPP's goals are to ensure all infants born to hepatitis B (HepB) surface antigen-positive women receive timely postexposure prophylaxis, complete HepB vaccine series, and obtain serologic testing after series completion.

METHODS

A decision analytic tree and a long-term Markov model represented the risk of perinatal and childhood infections under different prevention alternatives, and the long-term health and economic consequences of HepB infection. Outcome measures were the number of perinatal infections and childhood infections from infants born to HepB surface antigen-positive women, quality-adjusted life-years (QALYs), lifetime costs, and incremental cost per QALY gained. The health outcomes and total costs of each strategy were compared incrementally. Costs were evaluated from the health care system perspective and expressed in US dollars at a 2010 price base.

RESULTS

In all analyses, the PHBPP increased QALYs and led to higher reductions in the number of perinatal and childhood infections than no PHBPP, with a cost-effectiveness ratio of $2602 per QALY. In sensitivity analyses, the cost-effectiveness ratio was robust to variations in model inputs, and there were instances where the program was both more effective and cost saving.

CONCLUSIONS

This study indicated that the current PHBPP represents a cost-effective use of resources, and ensuring the program reaches all pregnant women could present additional public health benefits.

Paying the price: the pressing need for quality, cost, and outcomes data to improve correctional health care for older prisoners

Despite a recent decline in the U.S. prison population, the older prisoner population is growing rapidly. U.S. prisons are constitutionally required to provide health care to prisoners. As the population ages, healthcare costs rise, states are forced to cut spending, and many correctional agencies struggle to meet this legal standard of care. Failure to meet the healthcare needs of older prisoners, who now account for nearly 10% of the prison population, can cause avoidable suffering in a medically vulnerable population and violation of the constitutional mandate for timely access to an appropriate level of care while incarcerated. Older prisoners who cannot access adequate health care in prison also affect community healthcare systems because more than 95% of prisoners are eventually released, many to urban communities where healthcare disparities are common and acute healthcare resources are overused. A lack of uniform quality and cost data has significantly hampered innovations in policy and practice to improve value in correctional health care (achieving desired health outcomes at sustainable costs). With their unique knowledge of complex chronic disease management, experts in geriatrics are positioned to help address the aging crisis in correctional health care. This article delineates the basic health, cost, and outcomes data that geriatricians and gerontologists need to respond to this crisis, identifies gaps in the available data, and anticipates barriers to data collection that, if addressed, could enable clinicians and policy-makers to evaluate and improve the value of geriatric prison health care.

Too much of a good thing? When to stop catch-up vaccination

During the 20th century, deaths from a range of serious infectious diseases decreased dramatically due to the development of safe and effective vaccines. However, infant immunization coverage has increased only marginally since the 1960s, and many people remain susceptible to vaccine-preventable diseases. "Catch-up vaccination" for age groups beyond infancy can be an attractive and effective means of immunizing people who were missed earlier. However, as newborn vaccination rates increase, catch-up vaccination becomes less attractive: the number of susceptible people decreases, so the cost to find and vaccinate each unvaccinated person may increase; in addition, the number of infected individuals decreases, so each unvaccinated person faces a lower risk of infection. This article presents a general framework for determining the optimal time to discontinue a catch-up vaccination program. We use a cost-effectiveness framework: we consider the cost per quality-adjusted life year gained of catch-up vaccination efforts as a function of newborn immunization rates over time and consequent disease prevalence and incidence. We illustrate our results with the example of hepatitis B catch-up vaccination in China. We contrast results from a dynamic modeling approach with an approach that ignores the impact of vaccination on future disease incidence. The latter approach is likely to be simpler for decision makers to understand and implement because of lower data requirements.

Cost and threshold analysis of an HIV/STI/hepatitis prevention intervention for young men leaving prison: Project START

The objectives of this study were to: (a) estimate the costs of providing a single-session HIV prevention intervention and a multi-session intervention, and (b) estimate the number of HIV transmissions that would need to be prevented for the intervention to be cost-saving or cost-effective (threshold analysis). Project START was evaluated with 522 young men aged 18-29 years released from eight prisons located in California, Mississippi, Rhode Island, and Wisconsin. Cost data were collected prospectively. Costs per participant were $689 for the single-session comparison intervention, and ranged from $1,823 to 1,836 for the Project START multi-session intervention. From the incremental threshold analysis, the multi-session intervention would be cost-effective if it prevented one HIV transmission for every 753 participants compared to the single-session intervention. Costs are comparable with other HIV prevention programs. Program managers can use these data to gauge costs of initiating these HIV prevention programs in correctional facilities.

The estimated direct medical cost of selected sexually transmitted infections in the United States, 2008

BACKGROUND

Millions of cases of sexually transmitted infections (STIs) occur in the United States each year, resulting in substantial medical costs to the nation. Previous estimates of the total direct cost of STIs are quite dated. We present updated direct medical cost estimates of STIs in the United States.

METHODS

We assembled recent (i.e., 2002-2011) cost estimates to determine the lifetime cost per case of 8 major STIs (chlamydia, gonorrhea, hepatitis B virus, human immunodeficiency virus (HIV), human papillomavirus, genital herpes simplex virus type 2, trichomoniasis and syphilis). The total direct cost for each STI was computed as the product of the number of new or newly diagnosed cases in 2008 and the estimated discounted lifetime cost per case. All costs were adjusted to 2010 US dollars.

RESULTS

Results indicated that the total lifetime direct medical cost of the 19.7 million cases of STIs that occurred among persons of all ages in 2008 in the United States was $15.6 (range, $11.0-$20.6) billion. Total costs were as follows: chlamydia ($516.7 [$258.3-$775.0] million), gonorrhea ($162.1 [$81.1-$243.2] million), hepatitis B virus ($50.7 [$41.3-$55.6] million), HIV ($12.6 [$9.5-$15.7] billion), human papillomavirus ($1.7 [$0.8-$2.9] billion), herpes simplex virus type 2 ($540.7 [$270.3-$811.0] million), syphilis ($39.3 [$19.6-$58.9] million), and trichomoniasis ($24.0 [$12.0-$36.0] million). Costs associated with HIV infection accounted for more than 81% of the total cost. Among the nonviral STIs, chlamydia was the most costly infection.

CONCLUSIONS

Sexually transmitted infections continue to impose a substantial cost burden on the payers of medical care in the United States. The burden of STIs would be even greater in the absence of STI prevention and control efforts.

Cost effectiveness of screening immigrants for hepatitis B

BACKGROUND

The prevalence of chronic hepatitis B (CHB) infection among the immigrants of North America ranges from 2 to 15%, among whom 40% develop advanced liver disease. Screening for hepatitis B surface antigen is not recommended for immigrants.

AIMS

The objective of this study is to estimate the health and economic effects of screening strategies for CHB among immigrants.

METHODS

We used the Markov model to examine the cost-effectiveness of three screening strategies: (i) 'No screening'; (ii) 'Screen and Treat' and (iii) 'Screen, Treat and Vaccinate' for 20-65 years old individuals who were born abroad but are currently living in Canada. Model data were obtained from the published literature. We measured predicted hepatitis B virus (HBV)-related deaths, costs (2008 Canadian Dollars), quality-adjusted life-years (QALYs), and incremental cost-effectiveness ratio (ICER).

RESULTS

Our results show that screening all immigrants will prevent 59 HBV-related deaths per 10, 000 persons screened over the lifetime of the cohort. Screening was associated with an increase in quality-adjusted life expectancy (0.024 QALYs) and cost ($1665) per person with an ICER of $69, 209/QALY gained compared with 'No screening'. The 'Screen, Treat and Vaccinate' costs an additional $81, generates an additional 0.000022 QALYs per person, with an ICER of $3, 648,123/QALY compared with the 'Screen and Treat'. Sensitivity analyses suggested that the 'Screen and Treat' is likely to be moderately cost-effective.

CONCLUSION

We show that a selective hepatitis B screening programme targeted at all immigrants in Canada is likely to be moderately cost-effective. Identification of silent CHB infection with the offer of treatment when appropriate can extend the lives of immigrants at reasonable cost.

Doing Good with Good OR: Supporting Cost-effective Hepatitis B Interventions

In an era of limited healthcare budgets, mathematical models can be useful tools to identify cost-effective programs and to support policymakers in informed decision making. This paper reports results of our work carried out over several years with the Asian Liver Center at Stanford University, a nonprofit outreach and advocacy organization that is an international leader in the fight against hepatitis B and liver cancer. Hepatitis B is a vaccine-preventable viral disease that, if untreated, can lead to death from cirrhosis and liver cancer. Infection with hepatitis B is a major public health problem, particularly in Asian populations. We used new combinations of decision analysis and Markov models to analyze the cost-effectiveness of several interventions to combat hepatitis B in the United States and China. The results of our OR-based analyses have helped change United States public health policy on hepatitis B screening for millions of people and have helped encourage policymakers in China to enact legislation to provide free catch-up vaccination for hundreds of millions of children. These policies are an important step in eliminating health disparities, reducing discrimination, and ensuring that millions of people who need it can now receive hepatitis B vaccination or lifesaving treatment.

Testing for HIV, sexually transmitted infections, and viral hepatitis in jails: still a missed opportunity for public health and HIV prevention

Jails provide an underutilized public health opportunity for screening for HIV, sexually transmitted infections (STIs), and viral hepatitis, and for such other infectious diseases as tuberculosis. Incarcerated individuals are more likely to be men, poor, persons of color, and at high risk for HIV. The vast majority of jails in the United States do not screen routinely for HIV or STIs, thereby missing an opportunity for HIV and STI diagnosis, treatment, and prevention. Nesting HIV testing within STI testing and treatment in conjunction with testing and treatment for other infectious diseases, as appropriate based on community prevalence, provides a public health opportunity and will enhance HIV prevention. HIV testing and linkage to care, both within corrections and in the community, comprise an important component of the "seek and treat" strategy to further prevent HIV infection. Jail-based screening of infectious diseases, especially for HIV and STIs, in conjunction with treatment and linkage to community care has thus far been a neglected component of HIV prevention among high-risk communities.

Cost-effectiveness of nationwide hepatitis B catch-up vaccination among children and adolescents in China

Liver disease and liver cancer associated with childhood-acquired chronic hepatitis B are leading causes of death among adults in China. Despite expanded newborn hepatitis B vaccination programs, approximately 20% of children under age 5 years and 40% of children aged 5 to 19 years remain unprotected from hepatitis B. Although immunizing them will be beneficial, no studies have examined the cost-effectiveness of hepatitis B catch-up vaccination in an endemic country like China. We examined the cost-effectiveness of a hypothetical nationwide free hepatitis B catch-up vaccination program in China for unvaccinated children and adolescents aged 1 to 19 years. We used a Markov model for disease progression and infections. Cost variables were based on data published by the Chinese Ministry of Health, peer-reviewed Chinese and English publications, and the GAVI Alliance. We measured costs (2008 U.S. dollars and Chinese renminbi), quality-adjusted life years, and incremental cost-effectiveness from a societal perspective. Our results show that hepatitis B catch-up vaccination for children and adolescents in China is cost-saving across a range of parameters, even for adolescents aged 15 to 19 years old. We estimate that if all 150 million susceptible children under 19 were vaccinated, more than 8 million infections and 65,000 deaths due to hepatitis B would be prevented.

CONCLUSION

The adoption of a nationwide free catch-up hepatitis B vaccination program for unvaccinated children and adolescents in China, in addition to ongoing efforts to improve birth dose and newborn vaccination coverage, will be cost-saving and can generate significant population-wide health benefits. The success of such a program in China could serve as a model for other endemic countries.

Liver cancer mortality among male prison inmates in Texas, 1992-2003

OBJECTIVES

Prevalence estimates for several liver cancer risk factors-hepatitis C, hepatitis B, and history of alcohol abuse-are substantially higher in U.S. prison populations than in the general population. However, liver cancer mortality data from these populations are lacking. The primary aims of this study were to examine trends in liver cancer mortality rates from 1992 to 2003 among male prisoners in the Texas Department of Criminal Justice (TDCJ) and to compare these rates to general population rates.

METHODS

TDCJ data on male decedents (N=4026) were linked with Texas Vital Statistics multiple-cause-of-death data. Crude average annual liver cancer death rates, average annual percent changes, and standardized mortality ratios were estimated.

RESULTS

Crude liver cancer death rates increased by an average annual 6.1% among male prisoners, which was considerably higher than the average annual percent change among similarly aged males in Texas (2.0%) and the U.S. (2.9%). The number of liver cancer deaths among male prisoners was 4.7 (4.0-5.6) and 6.3 (5.3-7.5) times higher than the expected number of deaths estimated using age-specific rates from these reference populations.

CONCLUSIONS

From 1992 to 2003, liver cancer death rates and rate increases were elevated among Texas male prisoners. Findings support previous recommendations for targeted prevention, screening, and treatment of liver cancer risk factors in prison populations.

Viral hepatitis in incarcerated adults: a medical and public health concern

Viral hepatitis is a common problem in the incarcerated population. It causes significant morbidity and mortality, and incarcerated inmates receive their health care almost exclusively from corrections-based health systems. The seroprevalence of hepatitis B and C infections is increased in this population, and a number of risk factors for viral hepatitis are particularly common and infer higher risk among inmates, including injection drug use (IDU), high-risk sexual activity, and tattoos. IDU, in particular, has been identified as an important and common risk factor for viral hepatitis in inmates, and variable rates of IDU among inmates have been found to be the most important cause of the marked variability of seroprevalence rates for exposure to hepatitis C virus. A number of risk reduction and management strategies have been identified that can decrease transmission to other inmates. Prison-based hepatitis A and hepatitis B vaccination programs, needle exchange programs, methadone maintenance programs, risk education programs, and hepatitis C virus antiviral programs, for example, have been shown to be safe and effective risk reduction and management strategies. Preliminary studies have shown that these strategies are underutilized in the United States. Reasons for this phenomenon are multifactorial, involving financial as well as ethical and political considerations. Additional funding, research, and formal consideration / discussion of the complex issues involving viral hepatitis in the US incarcerated population are clearly important for the sake of inmates and the community at large. In this article, the published medical literature regarding this important topic is reviewed.

Hepatitis B virus infection in US correctional facilities: a review of diagnosis, management, and public health implications

Among the blood-borne chronic viral infections, hepatitis B virus (HBV) infection is one that is not only treatable but also preventable by provision of vaccination. Despite the availability of HBV vaccine for the last 15 years, more than 1.25 million individuals in the USA have chronic HBV infection, and about 5,000 die each year from HBV-related complications. From a societal perspective, access to treatment of chronic viral infections, like HIV and viral hepatitis, is highly cost-effective and has lasting benefits by reducing risk behaviors, morbidity, mortality, as well as disease transmission in the community. Individuals in correctional facilities are specially predisposed to such chronic viral infections because of their high-risk behaviors. The explosion of incarceration in the USA over the last few decades and the disproportionate burden of morbidity and mortality from chronic infections among the incarcerated have put incredible strains on an overcrowded system that was not originally designed to provide comprehensive medical care for chronic illnesses. Recently, there has been a call to address medical care for individuals with chronic medical conditions in correctional settings, including those with infectious diseases. The economic and public health burden of chronic hepatitis B and its sequelae, including cirrhosis and hepatocellular carcinoma, is felt most prominently in managed care settings with limited budgets, like correctional facilities. Prevalence of HBV infection among the incarcerated in the USA is fivefold that of the general population. We present a review of diagnosis, prevention, and the recently streamlined treatment guidelines for management of HBV infection in correctional settings, and discuss the implications and public health impact of these measures.

Economic evaluation of delivering hepatitis B vaccine to injection drug users

BACKGROUND

Injection drug users (IDUs) are at high risk of hepatitis B (HBV) infection, and hepatitis B vaccination coverage in IDUs is low. Recent studies demonstrate that syringe exchange programs are effective venues to reach and immunize IDUs. The purpose of this paper was to determine if targeting IDUs for HBV vaccination through syringe exchange programs is economically desirable for the healthcare system and to assess the relative effectiveness of several different vaccination strategies.

METHODS

Active IDUs in Chicago IL and Hartford and Bridgeport CT (N=1964) were recruited and screened through local syringe exchange programs, randomized to a standard (0, 1, 6 months) or accelerated (0, 1, 2 months) vaccination schedule, and followed from May 2003 to March 2006. Analyses were conducted in 2007. The vaccination program's costs were balanced against future HBV-associated medical costs. Benefits in terms of prevented acute HBV infections and quality-adjusted life years were estimated based on a Markov model.

RESULTS

HBV vaccination campaigns targeting IDUs through syringe exchange programs are cost-saving. The most cost-saving strategies include giving the first dose to everyone at screening, administering the vaccination under the accelerated schedule (0, 1, 2 months), and obtaining highly discounted vaccine from local health departments.

CONCLUSIONS

It is economically inappropriate to offer HBV screening in the absence of vaccination. Existing syringe exchange programs in the U.S. should include HBV vaccination.

Evaluation of a prison-based hepatitis B immunisation pilot project

This paper describes the evaluation findings of a hepatitis B immunisation pilot project, which aimed to increase the uptake and compliance of hepatitis B vaccinations among female prisoners in Victoria. The evaluation used a mixed methods approach including in-depth interviews, focus group discussions and an analysis of quantitative data. Fifty-five per cent of potential participants (391/712) were offered hepatitis B immunisation. Of those offered immunisation, 204 were eligible for immunisation and 169 (83%) received the first dose. Ninety-three per cent of eligible women received two doses and 84% completed the three-dose series. Lessons learnt from the pilot led to the revision of key prison hepatitis B immunisation policies and practices to ensure uniformity across Victorian prisons.

Cost effectiveness of hepatitis B vaccination at HIV counseling and testing sites

BACKGROUND

Despite recent significant achievements in controlling hepatitis B virus (HBV) infection, immunizing high-risk groups against the disease remains a public health challenge in the United States. The aims of this article are to evaluate the projected cost effectiveness of hepatitis B vaccination of adults attending two major types of publicly funded HIV counseling and testing sites (CTSs)-freestanding HIV CTSs and sexually transmitted disease (STD) clinics, and to compare the cost-effectiveness of alternative vaccination and testing strategies in different subgroups in this population.

METHODS

A decision model was developed to determine the economic and clinical consequences, from a societal perspective, of the following strategies in two hypothetical cohorts of 100,000 adults attending each type of site: (1) routine vaccination without screening, (2) screening for antibody to hepatitis B core antigen with an initial vaccine dose during the first visit, (3) screening and vaccination based on screening results, and (4) no intervention. Life expectancy, expected quality-adjusted life years (QALYs), and medical care costs were estimated for each strategy and at each site.

RESULTS

Routine vaccination was both more effective and more cost-effective than either screening strategy; under base-case assumptions, routine vaccination would cost $4400 both per QALY and per life year saved. Results for STD clinics were very similar in magnitude to those for freestanding CTSs. Results were most sensitive to clients' time and travel costs for return visits and the time-discount rate.

CONCLUSIONS

Routine provision of hepatitis B vaccine at major HIV CTSs would be a highly effective and cost-effective approach to preventing hepatitis B among high-risk adults in the United States.

Modelling the impact of prison vaccination on hepatitis B transmission within the injecting drug user population of England and Wales

A vaccination programme offering hepatitis B (HBV) vaccine at reception into prison has been introduced into selected prisons in England and Wales. The work here considers the impact of prison vaccination on the incidence and prevalence of hepatitis B virus (HBV) in the injecting drug user (IDU) population of England and Wales. A dynamic model of the transmission of HBV in IDUs is developed with key model assumptions and parameters being subject to sensitivity analyses. The base case model (that assumes that the vaccination coverage on prison reception is 5% in 2002, 10% in 2003 and then increases linearly up to 50% of prison receptions being vaccinated by 2006) predicts that the incidence of HBV in IDUs might be reduced by almost 80% in 12 years, and the HBV prevalence (IDUs ever infected by HBV) may be reduced from approximately 18% in 2002 to 7% in 2015. The model presented here demonstrates that HBV vaccination on prison reception can have a significant impact on the prevalence and incidence of HBV in the IDU population over time.

HIV/AIDS and other infectious diseases among correctional inmates: transmission, burden, and an appropriate response

Correctional inmates engage in drug-related and sexual risk behaviors, and the transmission of HIV, hepatitis, and sexually transmitted diseases occurs in correctional facilities. However, there is uncertainty about the extent of transmission, and hyperbolic descriptions of its extent may further stigmatize inmates and elicit punitive responses. Whether infection was acquired within or outside correctional facilities, the prevalence of HIV and other infectious diseases is much higher among inmates than among those in the general community, and the burden of disease among inmates and releasees is disproportionately heavy. A comprehensive response is needed, including voluntary counseling and testing on request that is linked to high-quality treatment, disease prevention education, substance abuse treatment, and discharge planning and transitional programs for releasees.

Ongoing transmission of hepatitis B virus infection among inmates at a state correctional facility

OBJECTIVES

We sought to determine hepatitis B virus (HBV) infection prevalence, associated exposures, and incidence among male inmates at a state correctional facility.

METHODS

A cross-sectional serological survey was conducted in June 2000, and susceptible inmates were retested in June 2001.

RESULTS

At baseline, 230 inmates (20.5%; 95% confidence interval [CI]=18.2%, 22.9%) exhibited evidence of HBV infection, including 11 acute and 11 chronic infections. Inmates with HBV infection were more likely than susceptible inmates to have injected drugs (38.8% vs 18.0%; adjusted prevalence odds ratio [OR]=3.0; 95% CI=1.9, 4.9), to have had more than 25 female sex partners (27.7% vs 17.5%; adjusted prevalence OR=2.0; 95% CI=1.4, 3.0), and to have been incarcerated for more than 14 years (38.4% vs 17.6%; adjusted prevalence OR=1.7; 95% CI=1.1, 2.6). One year later, 18 (3.6%) showed evidence of new HBV infection. Among 19 individuals with infections, molecular analysis identified 2 clusters involving 10 inmates, each with a unique HBV sequence.

CONCLUSIONS

We documented ongoing HBV transmission at a state correctional facility. Similar transmission may occur at other US correctional facilities and could be prevented by vaccination of inmates.

Prevention of infectious disease transmission in correctional settings: a review

OBJECTIVES

To review studies defining risk factors for infectious disease transmission in correctional settings, to determine target objectives, and to assemble recommendations for health promotion in prisons and jails.

METHODS

Electronic databases were searched, using a specific search strategy, from 1993 to 2003.

RESULTS

The principal risk factors in correctional facilities are proximity, high-risk sexual behaviour and injection drug use. Based on the type of disease transmissions and epidemics reported in the literature, four diseases were targeted for which preventive measures should be implemented: tuberculosis, human immunodeficiency virus, hepatitis and sexually transmitted diseases. Knowledge of risk factors helps define effective preventive measures along five main themes of action: information and education, screening, limiting harm from risk behaviour by distributing condoms and exchanging syringes, treatment and vaccinations.

CONCLUSIONS

The effectiveness and feasibility of each of these actions have to be assessed in relation to the specificities of the correctional setting.

An economic analysis of premarriage prevention of hepatitis B transmission in Iran

Background

To assess the economic aspects of HBV (hepatitis B virus) transmission prevention for premarriage individuals in a country with cultural backgrounds like Iran and intermediate endemicity of HBV infection.

Methods

A cost-effectiveness analysis model was used from the health care system and society perspectives. The effectiveness was defined as the number of chronic HBV infections averted owing to one of the following strategies:

1) HBsAg screening to find those would-be couples one of whom is HBsAg positive and putting seronegative subjects on a protection protocol comprising HBV vaccination, single dose HBIG and condom protection.

2) HBsAg screening as above, in addition to performing HBcAb screening in the HBsAg negative spouses of the HBsAg positive persons and giving the protocol only to HBcAb negative ones.

Sensitivity and threshold analyses were conducted.

Results

The cost of each chronic infection averted was 202$ and 197$ for the strategies 1 and 2, respectively. Sensitivity analysis showed that strategy 2 was always slightly cheaper than strategy 1. The discounted threshold value for the lifetime costs of chronic liver disease, above which the model was cost saving was 2818$ in strategy 1 and 2747$ in strategy 2.

Conclusions

Though premarriage prevention of HBV transmission in the countries with cultural backgrounds similar to Iran seems cost saving, further studies determining precise costs of HBV infection in Iran can lead to a better analysis.

Prisoners' attitudes toward Hepatitis B vaccination

BACKGROUND

Hepatitis B continues to be a substantial problem in the United States despite the existence of a safe and effective vaccine. Vaccination programs for inmates could reach many high-risk individuals but little is known about U.S. inmates' willingness to accept hepatitis B virus (HBV) vaccination while incarcerated. The goal of this study was to assess inmates' knowledge about hepatitis B and their willingness to accept hepatitis B vaccination while incarcerated.

METHODS

We interviewed 153 male and female inmates at the Rhode Island Department of Corrections (RIDOC) using a voluntary, anonymous survey.

RESULTS

Ninety-three percent of inmates said they would agree to receive the hepatitis B vaccine while incarcerated. More than half of the 30% who reported having risk factors for hepatitis B did not consider themselves to be at risk for hepatitis B and almost half (44%) of all inmates were not aware that hepatitis B can be transmitted through unprotected sex.

CONCLUSION

Hepatitis B vaccination programs in correctional settings are a public health priority and would be well received by the target population. Such programs would help protect the health of incarcerated persons and the communities to which they return.

Cost effectiveness of hepatitis A/B versus hepatitis B vaccination for US prison inmates

Hepatitis B immunization is provided in many US prison systems. We examined the cost effectiveness of substituting bivalent hepatitis A/B vaccine in this setting, considering regional variation in hepatitis A risks and the potential for disease transmission by former prisoners. Where hepatitis A rates are >200, 100-200, and <100% the national average, declines in hepatitis A treatment costs would offset 137, 88, and 40% of the bivalent vaccine's added cost. In the three regions considered, cost effectiveness would be US$ <0, 2131, and 22,819 per life-year saved, respectively. Prison-based hepatitis A/B immunization would meet accepted standards of cost effectiveness throughout the US.

An economic assessment of pre-vaccination screening for hepatitis A and B

OBJECTIVE

The availability of a single vaccine active against hepatitis A and B may facilitate prevention of both infections, but complicates the question of whether to conduct pre-vaccination screening. The authors examined the cost-effectiveness of pre-vaccination screening for several populations: first-year college students, military recruits, travelers to hepatitis A-endemic areas, patients at sexually transmitted disease clinics, and prison inmates.

METHODS

Three prevention protocols were examined: (1) screen and defer vaccination until serology results are known; (2) screen and begin vaccination immediately to avoid a missed vaccination opportunity; and (3) vaccinate without screening. Data describing pre-vaccination immunity, vaccine effectiveness, and prevention costs borne by the health system (i.e., serology, vaccine acquisition, and administration) were derived from published literature and U.S. government websites. Using spreadsheet models, the authors calculated the ratio of prevention costs to the number of vaccine protections conferred.

RESULTS

The vaccinate without screening protocol was most cost-effective in nine of 10 analyses conducted under baseline assumptions, and in 69 of 80 sensitivity analyses. In each population considered, vaccinate without screening was less costly than and at least equally as effective as screen and begin vaccination. The screen and defer vaccination protocol would reduce costs in seven populations, but effectiveness would also be lower.

CONCLUSIONS

Unless directed at vaccination candidates with the highest probability of immunity, pre-vaccination screening for hepatitis A and B immunity is not cost-effective. Balancing cost reduction with reduced effectiveness, screen and defer may be preferred for older travelers and prison inmates.

An economic assessment of pre-vaccination screening for hepatitis A and B

OBJECTIVE

The availability of a single vaccine active against hepatitis A and B may facilitate prevention of both infections, but complicates the question of whether to conduct pre-vaccination screening. The authors examined the cost-effectiveness of pre-vaccination screening for several populations: first-year college students, military recruits, travelers to hepatitis A-endemic areas, patients at sexually transmitted disease clinics, and prison inmates.

METHODS

Three prevention protocols were examined: (1) screen and defer vaccination until serology results are known; (2) screen and begin vaccination immediately to avoid a missed vaccination opportunity; and (3) vaccinate without screening. Data describing pre-vaccination immunity, vaccine effectiveness, and prevention costs borne by the health system (i.e., serology, vaccine acquisition, and administration) were derived from published literature and U.S. government websites. Using spreadsheet models, the authors calculated the ratio of prevention costs to the number of vaccine protections conferred.

RESULTS

The vaccinate without screening protocol was most cost-effective in nine of 10 analyses conducted under baseline assumptions, and in 69 of 80 sensitivity analyses. In each population considered, vaccinate without screening was less costly than and at least equally as effective as screen and begin vaccination. The screen and defer vaccination protocol would reduce costs in seven populations, but effectiveness would also be lower.

CONCLUSIONS

Unless directed at vaccination candidates with the highest probability of immunity, pre-vaccination screening for hepatitis A and B immunity is not cost-effective. Balancing cost reduction with reduced effectiveness, screen and defer may be preferred for older travelers and prison inmates.

The cost effectiveness of hepatitis immunization for US college students

Hepatitis B immunization is recommended for all American children, and hepatitis A immunization is recommended for children who live in areas with elevated disease rates. Because hepatitis A and B occur most commonly in young adults, the authors examined the cost effectiveness of college-based vaccination. They developed epidemiologic models to consider infection risks and disease progression and then compared the cost of vaccination with economic, longevity, and quality of life benefits. Immunization of 100,000 students would prevent 1,403 acute cases of hepatitis A, 929 cases of hepatitis B, and 144 cases of chronic hepatitis B. Hepatitis B vaccination would cost the health system $7,600 per quality-adjusted life year (QALY) gained but would reduce societal costs by 6%. Hepatitis A/B vaccination would cost the health system dollar 8,500 per QALY but would reduce societal costs by 12%. Until childhood and adolescent vaccination can produce immune cohorts of young adults, college-based hepatitis immunization can reduce disease transmission in a cost-effective manner.