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Establishment of individual prediction model for treatment response in HBeAg-positive chronic hepatitis B patients on lamivudine monotherapy

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dc.contributor.author강원석-
dc.date.accessioned2015-11-21T07:28:28Z-
dc.date.available2015-11-21T07:28:28Z-
dc.date.issued2009-
dc.identifier.urihttps://ir.ymlib.yonsei.ac.kr/handle/22282913/124433-
dc.descriptionDept. of Medicine/석사-
dc.description.abstract[한글] 배경: B형 간염바이러스의 증식을 억제하는 라미부딘은 만성 B형 간염에서의 장기적인 효용성 및 안정성이 밝혀져 있으나 최근 약제 내성 바이러스가 출현함에 따라 문제가 되고 있으나 경제적인 측면과 장기간 연구된 약제 안정성으로 인하여 라미부딘은 아직까지도 만성 B형 간염 치료에 있어서 널리 쓰이고 있다. 따라서 라미부딘 내성 바이러스의 발생 가능성이 적고 라미부딘 치료에 효과적인 반응을 보이는 환자들을 선별하는 것이 중요하다. 방법: 1999년 1월부터 2006년 8월까지 라미부딘 1일 100mg씩 6개월 이상 단독 치료를 받은 만성 B형 간염 환자 중 HBeAg 양성인 환자 748명을 대상으로 분석하였다. 단변량 및 다변량 분석을 통하여 HBeAg 혈청전환의 예측인자를 구한 뒤 로지스틱 회귀 분석을 이용하여 HBeAg 혈청전환의 확률을 산출하고 예측모형을 개발하였다. 예측 모형에 따라 고반응군(Pr≥50%), 중간반응군 (30결과: 라미부딘 단독치료의 중앙 기간은 34.2개월이었다. HBeAg의 누적 혈청전환율은 12개월째 26.1%에서 96개월째 50.7%로 증가하였다. HBeAg 혈청전환의 예측인자로는 환자의 나이(OR=0.974, 95% CI: 0.961-0.988, p<0.001), 치료전 ALT 수치(OR=1.001, 95% CI: 1.000-1.002, p=0.014), 그리고 치료 전 HBV DNA 수치(OR=0.749, 95% CI: 0.651-0.862, p<0.001)였다. 예측모형을 바탕으로 한 고반응군, 중간반응군, 저반응군에서의 HBeAg의 72개월 누적 혈청전환율은 각각 66.0%, 48.5%, 21.8% 이었다 (p<0.001). 결론: HBeAg 양성 만성 B형 간염 환자에서 라미부딘 단독 치료시 HBeAg 혈청전환 예측모형을 개발하였다. 이 예측 모형을 통하여 항바이러스 치료를 시작하기 전 라미부딘 치료의 반응을 예측함으로써 새로운 항바이러스 치료 가이드라인을 형성하는 데 도움이 될 것으로 생각된다. [영문] Background: Although the emergence of lamivudine-resistant strains is becoming a problem in the treatment of chronic hepatitis B, lamivudine is still the first-line drug in many countries, because of its long-term safety profile and relatively inexpensive cost. Therefore, it would be beneficial to screen lamivudine responders prior to lamivudine treatment. The aim of this study was to assess the predictors of lamivudine treatment response and to establish an individual prediction model for HBeAg seroconversion in HBeAg-positive chronic hepatitis B patients on lamivudine monotherapy. Methods: In this multi-center trial, retrospective analysis of 748 consecutive patients (Male:Female, 570:178) with HBeAg-positive chronic hepatitis B on lamivudine monotherapy was performed between January 1999 and August 2004. The median age was 43.0 years (range, 19-79). Multivariate analysis was conducted to identify factors associated with HBeAg seroconversion, and probability of HBeAg seroconversion was calculated in a logistic regression model. The probability (Pr) of HBeAg seroconversion was classified into high (Pr≥50%), intermediate (30Results: The duration of lamivudine monotherapy was 34.2 ± 0.7 months (mean ± SD). The cumulative HBeAg seroconversion rates were increased from 26.1% at 12 months to 50.7% at 96 months. In the multivariate analysis, age (OR=0.974, 95% CI: 0.961-0.988, p<0.001), pretreatment serum ALT level (OR=1.001, 95% CI: 1.000-1.002, p=0.014), and pretreatment serum HBV DNA level (OR=0.749, 95% CI: 0.651-0.862, p<0.001) were significant factors associated with HBeAg seroconversion. Based on the data from 748 HBeAg-positive chronic hepatitis B patients, an individual prediction model was established. The cumulative HBeAg seroconversion rate at 72 months for high, intermediate, and low response group was 66.0%, 48.5%, and 21.8%, respectively (p<0.001). Conclusion: An individual prediction model was developed based on the predictors of HBeAg seroconversion in HBeAg-positive chronic hepatitis B patients on lamivudine monotherapy. This model seems feasible and may facilitate screening lamivudine responders prior to the commencement of antiviral treatment.-
dc.description.statementOfResponsibilityopen-
dc.publisherGraduate School, Yonsei University-
dc.rightsCC BY-NC-ND 2.0 KR-
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/2.0/kr/-
dc.titleEstablishment of individual prediction model for treatment response in HBeAg-positive chronic hepatitis B patients on lamivudine monotherapy-
dc.typeThesis-
dc.contributor.departmentDept. of Internal Medicine (내과학교실)-
dc.contributor.localIdA00061-
dc.contributor.alternativeNameKang, Won Seok-
dc.contributor.affiliatedAuthor강원석-
dc.type.localThesis-
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 2. Thesis

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