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Long-term safety of oral nucleos(t)ide analogues for patients with chronic hepatitis B – a cohort study of 53,500 subjects
Grace Lai-Hung Wong1,2,3, Yee-Kit Tse1,2, Vincent Wai-Sun Wong1,2,3, Terry Yip-Cheuk Fung4, Kelvin Kam-Fai Choi5 andHenry Lik-Yuen Chan1,2,3,*
DOI: 10.1002/hep.27894
© 2015 by the American Association for the Study of Liver Diseases
Issue
Cover image for Vol. 61 Issue 5
Hepatology
Accepted Article (Accepted, unedited articles published online and citable. The final edited and typeset version of record will appear in future.)
Article has an altmetric score of 3
Additional Information(Show All)
1 Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong
2 Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
3 State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong
4 Department of Statistics, The Chinese University of Hong Kong, Hong Kong
5 Big Data Decision Analytics Research Centre, The Chinese University of Hong Kong, Hong Kong
*Corresponding Author: Henry LY Chan, MD Department of Medicine and Therapeutics, 9/F Prince of Wales Hospital, 30-32 Ngan Shing Street, Shatin, Hong Kong. Telephone: 852-2632-3942, Fax: 852-2637-3852, Email: [email protected]
Keywords:
adefovir dipivoxil;chronic renal failure;entecavir;fractures;hip fracture;lamivudine;renal replacement therapy;telbivudine;tenofovir disoproxil fumarate;vertebral fracture
ABSTRACT
Widespread and long-term use of oral nucleos(t)ide analogues (NAs) to treat chronic hepatitis B (CHB) brings about the safety data in real-life setting. We aimed to determine the risks of renal and bone side effects in patients receiving/who have received NAs as CHB treatment. A territory-wide cohort study using the database from Hospital Authority, the major provider of medical services in Hong Kong was conducted. We identified CHB patients by International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) diagnosis codes, diagnosed between 2000 and 2012. The primary events were renal (incident renal failure and renal replacement therapy [RRT]) and bone events (incident hip, vertebral and all fractures). A 3-year landmark analysis was used to evaluate the relative risk of primary outcome in patients with or without NA treatment. 53,500 CHB patients (46,454 untreated and 7,046 treated), who were event-free for 3 years, were included in the analysis. At a median follow-up of 4.9 years, chronic renal failure, RRT, all fractures, hip fractures and vertebral fractures occurred in 0.6%, 0.2%, 0.7%, 0.1% and 0.1% of untreated subjects; and 1.4%, 0.7%, 1.3%, 0.2% and 0.2% of treated subjects. After propensity score weighting, NA therapy did not increase the risk of any of the events (hazard ratios [HR] ranged from 0.79-1.31; P=0.225-0.887). Exposure to nucleotide analogues, compared with nucleoside analogues, increased the risk of hip fracture (HR=5.69, 95% confidence interval 1.98-16.39, P=0.001) but not other events (HR=0.58-1.44; P=0.202-0.823). Conclusions: NA treatment does not increase the risk of renal and bone events in general. Nucleotide analogues may increase the risk of hip fracture, but the overall event rate is low. This article is protected by copyright. All rights reserved.
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