Evidence map›Paper›PMID 34514452›Full record

ArticleThe Lancet regional health. Western Pacific2021

Impact of COVID-19 on Liver Transplantation in Hong Kong and Singapore: A Modelling Study.

Eunice Xiang-Xuan Tan, Wei Liang Quek, Suryadi, Haroun Chahed, Shridhar Ganpathi Iyer, Prema Raj Jeyaraj, Guan-Huei Lee, Albert Chan, Stephanie Cheng, Jan Hoe and 6 more

Open access · goldAbstract read
In one paragraph

Article in The Lancet regional health. Western Pacific, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
0.8field-weighted citation impact, top 27% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 1 synthesis or guideline pooled it, 9 citations in OpenAlex.

  1. Pooled it
  2. [Proportion and clinical characteristics of probable metabolic-associated fatty liver disease-related cirrhosis in cryptogenic cirrhosis].Zhonghua gan zang bing za zhi = Zhonghua ganzangbing zazhi = Chinese journal of hepatology · 2026
    Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Global epidemiology of cirrhosis - aetiology, trends and predictions.Nature reviews. Gastroenterology & hepatology · 2023
    Review
  8. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

16 authors at 6 institutions in 3 countries.

Eunice Xiang-Xuan TanDivision of Gastroenterology and Hepatology, Department of Medicine, National University Hospital, Singapore.
Wei Liang QuekSchool of Humanities, Nanyang Technological University, Singapore.
SuryadiSchool of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
Haroun ChahedSchool of Humanities, Nanyang Technological University, Singapore.
Shridhar Ganpathi IyerYong Loo Lin School of Medicine, National University of Singapore, Singapore.
Prema Raj JeyarajSingHealth Duke-NUS Transplant Centre, Singapore.
Guan-Huei LeeDivision of Gastroenterology and Hepatology, Department of Medicine, National University Hospital, Singapore.
Albert ChanDivision of Hepatobiliary and Pancreatic Surgery, and Liver Transplantation, Department of Surgery, The University of Hong Kong, China.
Stephanie ChengDepartment of Hepato-pancreato-biliary and Transplant Surgery, Singapore General Hospital, Singapore.
Jan HoeNational University Centre for Organ Transplantation, National University Health System, Singapore.
Ek Khoon TanSingHealth Duke-NUS Transplant Centre, Singapore.
Lock Yue ChewSchool of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
James FungDepartment of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China.
Melvin ChenSchool of Humanities, Nanyang Technological University, Singapore.
Mark D MuthiahDivision of Gastroenterology and Hepatology, Department of Medicine, National University Hospital, Singapore.
Daniel Q HuangDivision of Gastroenterology and Hepatology, Department of Medicine, National University Hospital, Singapore.
National University of Singapore · SGNanyang Technological University · SGSingapore General Hospital · SGNational University Health System · SGQueen Mary Hospital · CNUniversity of Hong Kong · HK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLiver transplantation (LT) activities during the COVID-19 pandemic have been curtailed in many countries. The impact of various policies restricting LT on outcomes of potential LT candidates is unclear.

methodsWe studied all patients on the nationwide LT waitlists in Hong Kong and Singapore between January 2016 and May 2020. We used continuous time Markov chains to model the effects of different scenarios and varying durations of disruption on LT candidates.

findingsWith complete cessation of LT, the projected 1-year overall survival (OS) decreased by 3•6%, 10•51% and 19•21% for a 1-, 3- and 6-month disruption respectively versus no limitation to LT, while 2-year OS decreased by 4•1%, 12•55%, and 23•43% respectively. When only urgent (acute-on-chronic liver failure [ACLF] or acute liver failure) LT was allowed, the projected 1-year OS decreased by a similar proportion: 3•1%, 8•41% and 15•20% respectively. When deceased donor LT (DDLT) and urgent living donor LT (LDLT) were allowed, 1-year projected OS decreased by 1•2%, 5•1% and 8•85% for a 1-, 3- and 6-month disruption respectively. OS was similar when only DDLT was allowed. Complete cessation of LT activities for 3-months resulted in an increased projected incidence of ACLF and hepatocellular carcinoma (HCC) dropout at 1-year by 49•1% and 107•96% respectively. When only urgent LT was allowed, HCC dropout and ACLF incidence were comparable to the rates seen in the scenario of complete LT cessation.

interpretationA short and wide-ranging disruption to LT results in better outcomes compared with a longer duration of partial restrictions.

fundingNone to disclose.

Indexed as

COVID-19hepatocellular carcinomaLiver transplantmodellingoutcomessurvival

Identifiers

PMID34514452
PMCPMC8421812
OpenAlexW3197849805

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.