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Fibrosis stage but not NASH predicts mortality and time to development of severe liver disease in biopsy-proven NAFLD
Karolinska University Hospital, Sweden; Karolinska Institute, Sweden; Karolinska Institute, Sweden.
Linköping University, Department of Medical and Health Sciences, Division of Cardiovascular Medicine. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Heart and Medicine Center, Department of Gastroentorology.
Linköping University, Department of Medical and Health Sciences, Division of Cardiovascular Medicine. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Heart and Medicine Center, Department of Gastroentorology.
Karolinska Institute, Sweden.
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2017 (English)In: Journal of Hepatology, ISSN 0168-8278, E-ISSN 1600-0641, Vol. 67, no 6, p. 1265-1273Article in journal (Refereed) Published
Abstract [en]

Background amp; Aims: Non-alcoholic fatty liver disease (NAFLD) is very common in the general population, but identifying patients with increased risk of mortality and liver-specific morbidity remains a challenge. Non-alcoholic steatohepatitis (NASH) is thought to enhance this risk; therefore, resolution of NASH is a major endpoint in current pharmacologic studies. Herein, we aim to investigate the long-term prognosis of a large cohort of NAFLD patients, and to study the specific effect of NASH and fibrosis stage on prognosis. Methods: We conducted a retrospective cohort study of 646 biopsy-proven NAFLD patients. Each case was matched for age, sex and municipality to ten controls. Outcomes on mortality and severe liver disease, defined as cirrhosis, liver decompensation/failure or hepatocellular carcinoma, were evaluated using population-based registers. Cox regression models adjusted for age, sex and type 2 diabetes were used to examine the long-term risk according to fibrosis stage. Likelihood ratio tests were used to assess whether adding NASH to these models increased the predictive capacity. Laplace regression was used to estimate the time to severe liver disease according to stage of fibrosis. Results: During a follow-up of mean 20 years (range 0-40) equivalent to 139,163 person-years, 12% of NAFLD patients and 2.2% of controls developed severe liver disease (p amp;lt; 0.001). Compared to controls, the risk of severe liver disease increased per stage of fibrosis (hazard ratio ranging from 1.9 in F0 to 104.9 in F4). Accounting for the presence of NASH did not change these estimates significantly (likelihood ratio test amp;gt; 0.05 for all stages of fibrosis). Similar results were seen for overall mortality. The lower end of the 95% confidence interval for the 10th percentile of time to development of severe liver disease was 22-26 years in F0-1, 9.3 years in F2, 2.3 years in F3, and 0.9 years to liver decompensation in F4. Conclusions: In this, the largest ever study of biopsy-proven NAFLD, the presence of NASH did not increase the risk of liver-specific morbidity or overall mortality. Knowledge of time to development of severe liver disease according to fibrosis stage can be used in individual patient counselling and for public health decisions. (C) 2017 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2017. Vol. 67, no 6, p. 1265-1273
Keyword [en]
Steatosis; Cirrhosis; Epidemiology
National Category
Gastroenterology and Hepatology
Identifiers
URN: urn:nbn:se:liu:diva-143355DOI: 10.1016/j.jhep.2017.07.027ISI: 000415325900019OAI: oai:DiVA.org:liu-143355DiVA: diva2:1162740
Note

Funding Agencies|Swedish Royal Academy of Sciences; Bengt Ihre scholarship; Swedish Gastroenterology Fund

Available from: 2017-12-05 Created: 2017-12-05 Last updated: 2017-12-05

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Nasr, PatrikEkstedt, MattiasKechagias, Stergios
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