Globally, there were 1.1 million hepatitis B virus (HBV)-related deaths in 2022, mostly from cirrhosis and hepatocellular carcinoma.[10]World Health Organization. Hepatitis B: fact sheet. Apr 2024 [internet publication].
https://www.who.int/news-room/fact-sheets/detail/hepatitis-b
Patients with acute HBV infection
More than 95% of immunocompetent individuals with acute infection will achieve seroconversion with appearance of antibody to hepatitis B surface antigen (anti-HBs) in the absence of treatment.[3]Terrault NA, Lok ASF, McMahon BJ, et al. Update on prevention, diagnosis, and treatment of chronic hepatitis B: AASLD 2018 hepatitis B guidance. Hepatology. 2018 Apr;67(4):1560-99.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5975958
http://www.ncbi.nlm.nih.gov/pubmed/29405329?tool=bestpractice.com
[39]European Association for the Study of the Liver. EASL 2017 clinical practice guidelines on the management of hepatitis B virus infection. J Hepatol. 2017 Aug;67(2):370-98.
http://www.journal-of-hepatology.eu/article/S0168-8278(17)30185-X/fulltext
http://www.ncbi.nlm.nih.gov/pubmed/28427875?tool=bestpractice.com
Patients with hepatitis B e antigen-positive chronic HBV infection
The end point of treatment is well defined in this patient population, based on predictability and durability of seroconversion to antibody to hepatitis B e antigen (anti-HBe). When treatment is stopped after seroconversion is achieved, viral suppression is sustained in 50% to 90% of patients. Seroconversion is associated with maintained long-term improvement in liver histology.[157]Niederau C, Heintges T, Lange S, et al. Long-term follow-up of HBeAg-positive patients treated with interferon alfa for chronic hepatitis B. N Engl J Med. 1996 May 30;334(22):1422-7.
http://www.ncbi.nlm.nih.gov/pubmed/8618580?tool=bestpractice.com
However, true cure (loss of hepatitis B surface antigen and anti-HBs) occurs in a very low percentage of treated patients (1% to 5%).[24]Ganem D, Prince AM. Hepatitis B virus infection - natural history and clinical consequences. N Engl J Med. 2004 Mar 11;350(11):1118-29.
http://www.ncbi.nlm.nih.gov/pubmed/15014185?tool=bestpractice.com
[158]Gish RG, Chang TT, Lai CL, et al. Loss of HBsAg antigen during treatment with entecavir or lamivudine in nucleoside-naive HBeAg-positive patients with chronic hepatitis B. J Viral Hepat. 2010 Jan;17(1):16-22.
http://www.ncbi.nlm.nih.gov/pubmed/19622117?tool=bestpractice.com
Patients with hepatitis B surface antigen-negative chronic HBV infection
The end point of treatment for this group of patients is poorly defined. Therefore, treatment duration is prolonged and probably needs to be lifelong unless there is a compelling reason to stop treatment after carefully weighing the risks and benefits. In addition, relapse with this group of patients is frequent even when there is complete viral suppression after discontinuation of drugs (undetectable HBV DNA) for >1 year.[3]Terrault NA, Lok ASF, McMahon BJ, et al. Update on prevention, diagnosis, and treatment of chronic hepatitis B: AASLD 2018 hepatitis B guidance. Hepatology. 2018 Apr;67(4):1560-99.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5975958
http://www.ncbi.nlm.nih.gov/pubmed/29405329?tool=bestpractice.com