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Nagai K, Ide K, Kawasaki Y, Tanaka-Mizuno S, Seto K, Iwane S, Eguchi Y, Kawakami K. Estimating the cost-effectiveness of screening for hepatitis C virus infection in Japan. Hepatol Res 2020; 50:542-556. [PMID: 31899841 DOI: 10.1111/hepr.13478] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 11/28/2019] [Accepted: 12/04/2019] [Indexed: 01/15/2023]
Abstract
AIM The management of hepatitis C virus (HCV) has changed with the advent of interferon (IFN)-free treatment and the declining prevalence of HCV infection, which may impact the cost-effectiveness of the screening. We aimed to compare the cost-effectiveness and clinical outcomes of three screening strategies in the Japanese general population: no screening, screening plus IFN-based therapy, and screening plus IFN-free therapy. METHODS We developed a decision analytic Markov model for screening intervention and natural history of HCV. Model parameters were derived from published literature. A lifetime horizon and the healthcare payer perspective were taken. Subanalyses included high screening scenario with improved rates of screening and attending referral, in addition to heterogeneity analysis by age subgroup. RESULTS In the base case, the incremental cost-effectiveness ratio in the Japanese general population aged 40-89 years was ¥1 124 482 and ¥1 085 183 per quality-adjusted life year gained for screening plus IFN-free therapy compared with no screening and screening plus IFN-based therapy, respectively. Screening plus IFN-free therapy remained cost-effective below ¥5 000 000 per quality-adjusted life year gained in sensitivity analyses. Incremental cost-effectiveness ratios were lower in the younger population. Nearly 0.2% of HCV-related deaths were avoided by 1.5% of the general population screened followed by IFN-free therapy relative to no screening; the impact was greater with improved rates of screening and attending referral. CONCLUSIONS Screening and subsequent IFN-free therapy for HCV appears to be cost-effective. Early diagnosis and treatment would produce a favorable incremental cost-effectiveness ratio. Improved rates of screening and attending referral would result in further reduction of disease progression.
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Affiliation(s)
- Kota Nagai
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University, Kyoto, Japan.,Eisai Co., Ltd., Tokyo, Japan
| | - Kazuki Ide
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University, Kyoto, Japan.,Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Yohei Kawasaki
- Biostatistics Section, Clinical Research Center, Chiba University Hospital, Chiba, Japan
| | | | - Kahori Seto
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University, Kyoto, Japan
| | - Shinji Iwane
- Liver Center, Saga University Hospital, Saga, Japan
| | | | - Koji Kawakami
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University, Kyoto, Japan.,Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
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Tanaka J, Akita T, Ko K, Miura Y, Satake M. Countermeasures against viral hepatitis B and C in Japan: An epidemiological point of view. Hepatol Res 2019; 49:990-1002. [PMID: 31364248 PMCID: PMC6852166 DOI: 10.1111/hepr.13417] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 07/01/2019] [Accepted: 07/23/2019] [Indexed: 12/12/2022]
Abstract
Although the mortality rate due to hepatocellular carcinoma (HCC) has been gradually decreasing in Japan, approximately 30 000 people died of HCC in 2016. In 2007, the dominant etiology was persistent hepatitis C virus (HCV) infection, which accounted for 65% of total HCC deaths, and 15% of cases were due to chronic hepatitis B virus (HBV) infection. In managing chronic HBV and HCV infection, it is critically important to know the exact number of infected individuals in a particular country, which then assists in evaluating medical and financial needs in the foreseeable future. Therefore, from an epidemiological perspective, we estimated the numbers of HBV and HCV carriers in four categories: (i) undiagnosed carriers; (ii) carriers who were already hospitalized as patients or were receiving outpatient medical attention; (iii) diagnosed carriers who had not consulted any medical facility, or had discontinued consultation; and (iv) newly infected carriers. From these estimates we determined the current HBV and HCV burden and then reviewed the existing countermeasures for their prevention and control in Japan. While continuing the surveillance on the dynamics of hepatitis virus infections linked with preventive measures against hepatitis virus infection, it is crucially important to promote appropriate measures for each of the four groups of hepatitis virus carriers in society.
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Affiliation(s)
- Junko Tanaka
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health SciencesHiroshima UniversityJapan
| | - Tomoyuki Akita
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health SciencesHiroshima UniversityJapan
| | - Ko Ko
- Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical and Health SciencesHiroshima UniversityJapan
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Ishikawa T, Imai M, Owaki T, Sato H, Nozawa Y, Sano T, Iwanaga A, Seki K, Honma T, Yoshida T. Successful Ombitasvir/Paritaprevir/Ritonavir Plus Ribavirin Retreatment for a Chronic Hepatitis C Genotype 2a Patient Who Relapsed after Sofosbuvir Plus Ribavirin Treatment. Intern Med 2018; 57:2843-2845. [PMID: 29780129 PMCID: PMC6207807 DOI: 10.2169/internalmedicine.0621-17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The optimum retreatment strategy for chronic hepatitis C virus (HCV) patients who failed directly-acting antiviral agents (DAA)-based therapy is unknown. We herein report the outcomes of an HCV genotype (GT) 2a-infected patient with virologic failure following treatment with sofosbuvir plus ribavirin (SOF+RBV) who was successfully retreated with ombitasvir/paritaprevir/ritonavir plus ribavirin (OBV/PTV/r+RBV).
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Affiliation(s)
- Toru Ishikawa
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
| | - Michitaka Imai
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
| | - Takashi Owaki
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
| | - Hiroki Sato
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
| | - Yujiro Nozawa
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
| | - Tomoe Sano
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
| | - Akito Iwanaga
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
| | - Keiichi Seki
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
| | - Terasu Honma
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
| | - Toshiaki Yoshida
- Department of Gastroenterology and Hepatology, Saiseikai Niigata Daini Hospital, Japan
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Yamasaki K, Tanaka J, Kurisu A, Akita T, Ohisa M, Sakamune K, Ko K, Sugiyama A, Yasaka T, Shirahama S. Natural course of persistent hepatitis B virus infection in hepatitis B e antigen-positive and hepatitis B e antigen-negative cohorts in Japan based on the Markov model. J Med Virol 2018; 90:1800-1813. [PMID: 29995323 DOI: 10.1002/jmv.25260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 06/14/2018] [Indexed: 01/29/2023]
Abstract
This population-based study examined the natural course of hepatitis B e antigen (HBeAg)-positive or HBeAg-negative persistent hepatitis B virus (HBV) infection, adjusted by age and liver disease states using a Markov model. Using 12 417 person-years data (n = 862), annual transition probabilities were estimated, and age-adjusted cumulative incidence and natural history of persistent HBV infection were simulated in both sexes of groups 1 (HBeAg-negative status with HBV DNA level <4.0 log IU/mL at entry) and 2 (persistent HBeAg-positive status throughout the study). In group 1, 15.26% of 30-years old men with chronic hepatitis (CH) were expected to remain in the same state at age 65 years, 28.32% subsided into an hepatitis B surface antigen (HBsAg)-negative state, and 13.20% developed hepatocellular carcinoma (HCC). The expectations for 40-years old men in group 1 were 21.43%, 19.86%, and 15.04%, respectively. The expectations for 30 years women in group 1 were 30.57%, 21.15%, and 4.08%, respectively. These results suggest that HBeAg positivity caused a higher risk of HCC onset in persistent HBV infection after adjustments for age, sex, and liver disease state. HCC was likely to develop, but unlikely to subside into HBsAg clearance, remaining in a CH state with aging, regardless of HBeAg state. Furthermore, both HCC development and HBsAg clearance occurred more frequently in men than in women, irrespective of HBeAg status.
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Affiliation(s)
- Kazumi Yamasaki
- Clinical Research Center, National Hospital Organization Nagasaki Medical Center, Nagasaki, Japan
| | - Junko Tanaka
- Department of Epidemiology, Infectious Disease Control and Prevention, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Akemi Kurisu
- Department of Epidemiology, Infectious Disease Control and Prevention, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Tomoyuki Akita
- Department of Epidemiology, Infectious Disease Control and Prevention, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Masayuki Ohisa
- Department of Epidemiology, Infectious Disease Control and Prevention, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Kazuaki Sakamune
- Department of Epidemiology, Infectious Disease Control and Prevention, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Ko Ko
- Department of Epidemiology, Infectious Disease Control and Prevention, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Aya Sugiyama
- Department of Epidemiology, Infectious Disease Control and Prevention, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
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Randomized Phase 3 Trial of Ombitasvir/Paritaprevir/Ritonavir and Ribavirin for Hepatitis C Virus Genotype 2-Infected Japanese Patients. Adv Ther 2017; 34:1449-1465. [PMID: 28536999 DOI: 10.1007/s12325-017-0506-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Indexed: 12/11/2022]
Abstract
INTRODUCTION In Japan, hepatitis C virus (HCV) genotype (GT) 2 accounts for approximately 32% of HCV infections. Limited treatment options exist in Japan for HCV GT2-infected patients. GIFT-II was a phase 3, randomized, open-label study evaluating the efficacy and safety of 16- and 12-week regimens of co-formulated ombitasvir (OBV)/paritaprevir (PTV)/ritonavir (r) plus ribavirin (RBV) in Japanese adults with HCV GT2 infection. METHODS Patients were randomized in a 1:1 ratio to once-daily, co-formulated OBV/PTV/r (25/150/100 mg) with weight-based RBV for 16 or 12 weeks. The primary efficacy endpoint was the sustained virologic response at 12 weeks post-treatment (SVR12) rate in the primary efficacy population of non-cirrhotic treatment-naive patients. RESULTS A total of 171 patients were randomized to OBV/PTV/r + RBV. In the primary efficacy population, SVR12 rates were 91.5% (43/47; 95% confidence interval 83.5-99.5%) and 75.0% (36/48; 95% confidence interval 62.8-87.2%) in the 16-week arm and 12-week arm, respectively. No patient in the 16-week arm relapsed by post-treatment week 12. Among non-cirrhotic treatment-experienced patients, the overall SVR rate in the 16-week arm was 75.8% (25/33) and was highest [93.8% (15/16)] among those who had relapsed after previous interferon-based therapy. SVR12 rates were consistently higher in patients with HCV GT2a infection versus HCV GT2b infection [16-week treatment arm: 93.9% (31/33) versus 85.7% (12/14) and 93.8% (15/16) versus 56.3% (9/16) among non-cirrhotic treatment-naive and treatment-experienced patients, respectively]. No patient discontinued treatment because of an adverse event. The most common adverse events were anemia, increased blood bilirubin, and nasopharyngitis. CONCLUSIONS OBV/PTV/r + RBV for 16 weeks resulted in high SVR12 rates in non-cirrhotic Japanese patients infected with HCV GT2 who were treatment-naive or who had relapsed after an interferon-based therapy. Higher SVR12 rates were observed among patients with HCV GT2a infection versus those with GT2b infection. This regimen demonstrated a favorable safety profile. TRIAL REGISTRATION ClinicalTrials.gov identifier, NCT02023112. FUNDING AbbVie.
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Abstract
OBJECTIVE To estimate the cost-effectiveness of safety-engineered devices (SEDs) relative to non-SEDs for winged steel needles, intravenous catheter stylets, suture needles, and insulin pen needles. DESIGN Decision analysis modeling. PARTICIPANTS Hypothetical cohort of healthcare workers who utilized needle devices. METHODS We developed a decision-analytic model to estimate and compare the life-cycle costs and benefits for SED and non-SED needle devices. For this cost-effectiveness analysis, we quantified the total direct medical cost per needlestick injury, number of needlestick injuries avoided, and incremental cost-effectiveness ratio. Sensitivity analyses were performed to examine the robustness of the base-case analysis. RESULTS In the base-case analysis, we calculated the incremental cost-effectiveness ratios of SED winged steel needles, intravenous catheter stylets, suture needles, and insulin pen needles to be $2,633, $13,943, $1,792, and $1,269 per needlestick injury avoided, respectively. Sensitivity analyses showed that the calculated incremental cost-effectiveness ratio values for using SEDs did not fall below zero even after adjusting the values of each parameter. CONCLUSION The use of SED needle devices would not produce cost savings for hospitals. Government intervention may be needed to systematically protect healthcare workers in Japan from the risk of bloodborne pathogen infections. Infect Control Hosp Epidemiol 2016;37:1012-1021.
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Kanda T, Nakamoto S, Yasui S, Nakamura M, Miyamura T, Wu S, Jiang X, Arai M, Imazeki F, Yokosuka O. Occurrence and Recurrence of Hepatocellular Carcinoma Were Not Rare Events during Phlebotomy in Older Hepatitis C Virus-Infected Patients. Case Rep Oncol 2014; 7:288-96. [PMID: 24926259 PMCID: PMC4035674 DOI: 10.1159/000362869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The use of phlebotomy is relatively common for ‘difficult-to-treat by antiviral therapies’ hepatitis C virus (HCV)-infected patients and for certain patients having chronic liver diseases with an iron overload of the liver. In the present study, we retrospectively analyzed patients treated with phlebotomy and their adverse events. We observed the occurrence and recurrence of hepatocellular carcinoma, and the appearance of ascites in some patients infected with HCV as well as the reduction of serum ferritin and alanine aminotransferase levels. Severe adverse events necessitating a cessation of phlebotomy occurred independently of α-fetoprotein (>10 ng/ml) in patients infected with HCV according to multivariate logistic regression analysis. These findings may serve as a basis for phlebotomy especially in older patients with chronic hepatitis C.
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Affiliation(s)
- Tatsuo Kanda
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Shingo Nakamoto
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Shin Yasui
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Masato Nakamura
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Tatsuo Miyamura
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Shuang Wu
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Xia Jiang
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Makoto Arai
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Fumio Imazeki
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Osamu Yokosuka
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
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