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410
Efficacy and Renal Safety of Long-Term
Tenofovir Disoproxil Fumarate Therapy in
Chronic Hepatitis B Patients with Normal
or Mild Renal Dysfunction (eGFR ≥60 mL/
min/1.73m2)
In Hee KIM, Chang Hun Lee, Seong Hun Kim, Sang Wook
Kim, Seung Ok Lee and Soo Teik Lee, Internal Medicine,
Chonbuk National University Medical School, Research
Institute of Clinical Medicine of Chonbuk National University-
Biomedical Research Institute of Chonbuk National University
Hospital
Background: We aimed to compare efficacy and renal safety
of long-term tenofovir disoproxil fumarate (TDF) therapy in
chronic hepatitis B patients with normal versus mild renal
dysfunction. Methods: We reviewed both treatment-naïve
or –experienced CHB patients who had treated with TDFbased
therapy between August 2012 and December 2017
at Chonbuk National University Hospital. Study patients
had divided into group I, normal renal function, defined
as estimated glomerular filtration rate (eGFR) ≥90 mL/
min/1.73m2 or group II, mild renal dysfunction, defined as
eGFR 60-90 mL/min/1.73m2. Renal impairment was defined
as elevation of serum creatinine 0.3 mg/dL above the baseline
level or a decrease of eGFR < 60 mL/min/1.73m2. Results: A
total of 426 patients (371 patients in group I and 55 patients
in group II) were included for analysis. The mean eGFR were
107.5 ± 11.2 mL/min/1.73m2 and 80.5 ± 8.6 mL/min/1.73m2 in
group I and group II, respectively. In a comparison of baseline
characteristics, group II patients were older. The treatment
outcomes showed favorable results for both group I and
group II without significant difference between the two groups.
Regarding renal safety, the incidence of renal impairment
during TDF therapy was low both in group I and group II, and
overall renal impairment was 2.9%, 1.8%, and 1.7% at 1-year,
2-year, and 3-year follow-ups, respectively. Although the
cumulative rates of virologic response were similar between
group I and group II, the cumulative rates of renal impairment
were significantly high in group II (P = 0.003). In a multivariate
analysis, the presence of diabetes mellitus and initial mild
renal dysfunction (eGFR 60-90 mL/min/1.73m2) were
associated with increased risk of renal toxicity. Conclusion:
TDF therapy is an effective treatment option among CHB
patients with conserved renal function at baseline. However,
underlying diabetes mellitus and initial mild renal dysfunction
(eGFR 60-90 mL/min/1.73m2) may increase the risk of renal
toxicity. |
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