Abstract

Objective: To observe continuous and intermittent application of lamivudine or entecavir resistance mutations in patients with chronic hepatitis B. Methods: Data of patients with active stage of chronic hepatitis B over the past 6 years were collected and analyzed retrospectively. The incidence of drug resistance mutation and related factors between patients taking LAM or ETV continuously and intermittently were compared with those taking LAM or ETV. Data comparison was performed using χ(2) test. Results: Patients with HBV DNA≥10(5) copies / ml at the time of initial treatment had higher resistance mutation rates than those with HBV DNA < 10(5) copies / ml at either continuous or intermittent treatment, and patients with intermittent treatment had higher resistance mutation rates than those with continuous treatment. Simultaneously, the incidence of drug resistance mutation in LAM and ETV in the first, second and third years were significantly higher in intermittent treatment than that of continuous treatment (P < 0.05). There was a positive correlation between the frequency of drug withdrawal and the rate of drug resistance mutation. There were no individual difference and drug difference between LAM and ETV. Conclusion: In the treatment of chronic hepatitis B with oral nucleoside analogues, drug resistance may occur in either continuous or intermittent treatment. When comparing continuous with intermittent treatment, it suggests that intermittent is more likely to cause viral resistance mutation.

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