International Journal of Medical Sciences

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18 December 2018

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Int J Med Sci 2013; 10(4):427-433. doi:10.7150/ijms.5472

Research Paper

Efficacy of Entecavir Treatment for up to 5 Years in Nucleos(t)ide-Naïve Chronic Hepatitis B Patients in Real Life

Jie Luo1, Xiangyong Li1, Yuankai Wu1, Guoli Lin1, Yihua Pang1, Xiao Zhang1, Yunlong Ao1, Zhan Du2, Zhixin Zhao1, Yutian Chong1 ✉

1. Department of Infectious Diseases, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China;
2. Department of Pathology, Medical College of Jinan University, Guangzhou 510632, China.


Objective: To analyze the efficacy and safety of entecavir (ETV) treatment for up to 5 years in nucleos(t)ide-naïve chronic hepatitis B patients in real life.

Methods: We retrospectively analyzed 230 nucleos(t)ide naïve chronic hepatitis B patients who received ETV 0.5 mg/day monotherapy for at least 3 months, of whom 113 were HBeAg positive and 117 were HBeAg negative. The primary endpoints was cumulative probability of achieving a virological response (undetectable serum HBV DNA, <100IU/mL). Secondary endpoints were rates of ALT normalization (ALT < upper limit of normal), HBeAg seroconversion, resistance, and safety.

Results: The median follow-up duration was 27.5 months (3-73 months) and mean age was 42 years. With 230, 214, 180, 142, 88, 42 and 11 patients followed-up for at least 3 months,6 months, 1, 2, 3, 4 and 5 years, respectively. In all, Incremental increases were observed in the rates of undetectable HBV DNA. 67.0%, 85.0%, 89.4%, 94.4%, 95.5%, 97.6%, 100% had undetectable HBV DNA at month 3, month 6, 1 year, 2 years, 3 years, 4 years and 5 years. Proportions of patients achieving normal ALT were 73.9%, 85.5%, 82.8%, 89.4%, 80.7%, 85.7%, 100%, respectively. The rate of HBeAg seroconversion reached 21.4% and 15.4% at year2, 3, respectively. One patient achieved HBsAg seroclearance after 1 year, and achieved anti-HBs seroconversion at year 3. Of 180 patients, HBV DNA was detectable (partial virological response, PVR) in 19 patients at year 1 of follow-up, twelve of 14 (85.7%) patients with PVR need more than 1 year of continuous ETV therapy to achieved VR. At baseline, no ETV-resistance was detected in 25 ETV-naïve patients. One patient developed ETV-resistance mutations due to noncompliance. No serious adverse event was reported.

Conclusion: Long-term ETV treatment of nucleos(t)ide-naïve was effective and safe in real life. Adjustment of ETV monotherapy in nucleos(t)ide-naïve patients with a partial virological response at 1 year may be unnecessary.

Keywords: Hepatitis B, Chronic, Entecavir, Nucleos(t)ide analogues, Resistance

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) License. See for full terms and conditions.
How to cite this article:
Luo J, Li X, Wu Y, Lin G, Pang Y, Zhang X, Ao Y, Du Z, Zhao Z, Chong Y. Efficacy of Entecavir Treatment for up to 5 Years in Nucleos(t)ide-Naïve Chronic Hepatitis B Patients in Real Life. Int J Med Sci 2013; 10(4):427-433. doi:10.7150/ijms.5472. Available from