Evidence map›Paper›PMID 33978301›Full record

ArticleLiver international : official journal of the International Association for the Study of the Liver2021

Environmental risk factors are associated with autoimmune hepatitis.

Craig Lammert, Sai N Chalasani, Elizabeth J Atkinson, Bryan M McCauley, Konstantinos N Lazaridis

Abstract read
In one paragraph

Article in Liver international : official journal of the International Association for the Study of the Liver, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

16 citing papers in PubMed, 1 synthesis or guideline pooled it.

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  14. Hepatitis A: Viral Structure, Classification, Life Cycle, Clinical Symptoms, Diagnosis Error, and Vaccination.The Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2023
    Review
  15. Environmental risk factors are associated with autoimmune hepatitis.Liver international : official journal of the International Association for the Study of the Liver · 2021
    Article
  16. 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

5 authors.

Craig LammertDivision of Gastroenterology and Hepatology, Indiana University School of Medicine, Indianapolis, IN, USA.ORCID 0000-0003-3809-640X
Sai N ChalasaniDivision of Gastroenterology and Hepatology, Indiana University School of Medicine, Indianapolis, IN, USA.
Elizabeth J AtkinsonDivision of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, Rochester, MN, USA.
Bryan M McCauleyDivision of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, Rochester, MN, USA.
Konstantinos N LazaridisDivision of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, Rochester, MN, USA.ORCID 0000-0002-0437-681X

Funding

Autoimmune Hepatitis: Genetic and Environmental RisksK23DK114561 · NIDDK · INDIANA UNIVERSITY INDIANAPOLIS · PI LAMMERT, CRAIG S · 2018 to 2021
$801k
NIDDK NIH HHS K23 DK114561
6 · The paper itself

Abstract

backgroundFailure of immunologic homeostasis and resultant hepatocyte destruction in autoimmune hepatitis (AIH) is likely the result of environmental triggers within a permissive genetic architecture.

aimsWe aimed to identify risk factors associated with AIH in a well-phenotyped AIH cohort.

methodsWe prospectively collected environmental questionnaires from 358 AIH cases and 563 healthy controls. Response frequencies were compared using logistic regression, adjusting for age at recruitment, sex and education.

resultsAIH cases were more likely to ever have a urinary tract infection (UTI) (53.6% vs 33.9%, P < .001) and recurrent UTI (more than 1 per year) (23.5% vs 15.9%, P = .002) compared to controls. Female cases more frequently had ever used oral contraceptives (83.0% vs 73.7%, P = .006), fewer pregnancies (median = 1 vs 3, P < .001) and less often used hormone replacement therapy compared to controls (28.5% vs 60.1%, P < .001). Current smoking was more prevalent in cases (18.9% vs 7.4%, P = .022), yet no difference according to historical smoking behaviours was observed. Finally, cases were less likely to have history of mumps (32.4% vs 53.1%, P = .011) and rheumatic fever (1.1% vs 4.4%, P = .028), but reported higher vaccination frequency to chicken pox (38% vs 28.1%), measles (66.5% vs 39.3%), mumps (58.7% vs 34.6%), rubella (55.3% vs 32.7%), pertussis (59.8% vs 40.1%) and pneumococcus (47.2% VS 39.4%) (P < .002).

conclusionsEnvironmental factors are important in AIH pathogenesis. Replication of these findings and prospective examination may provide new insight into AIH onset and outcomes.

Indexed as

Hepatitis, AutoimmuneCohort StudiesFemaleHumansProspective StudiesRisk Factorsautoimmune hepatitisenvironmentinfectionoestrogenUTIvaccine

Identifiers

PMID33978301
PMCPMC8496440

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Registered trials

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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.