Evidence map›Paper›PMID 39817495›Full record

SynthesisCancer medicine2025

The Association Between Serum Gamma-Glutamyl Transferase and Gastrointestinal Cancer Risk: A Systematic Review and Meta-Analysis.

Alireza Ramandi, Jacob George, Amir Hossein Behnoush, Alireza Delavari, Zahra Mohammadi, Hossein Poustchi, Reza Malekzadeh

Abstract readSystematic ReviewMeta-Analysis
In one paragraph

Synthesis in Cancer medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing 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

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

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  6. Infection trajectories and dementia risk in type 2 diabetes.Diabetology & metabolic syndrome · 2026
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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

7 authors.

Alireza RamandiDivision of Gastroenterology and Hepatology, Weill Cornell Medicine, New York, New York, USA.ORCID https://orcid.org/0000-0001-8247-4258
Jacob GeorgeStorr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Westmead, New South Wales, Australia.
Amir Hossein BehnoushDigestive Disease Research Center, Digestive Disease Research Institute, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran.ORCID https://orcid.org/0000-0002-9955-4227
Alireza DelavariLiver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
Zahra MohammadiLiver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
Hossein PoustchiLiver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
Reza MalekzadehDigestive Disease Research Center, Digestive Disease Research Institute, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran.ORCID https://orcid.org/0000-0002-9820-6335

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGamma-glutamyl transferase (GGT) has been shown to have associations with several diseases including cancers. Previous studies have investigated the effect of GGT levels on the gastrointestinal (GI) cancer incidence. We aim to systematically investigate these studies to provide better insights into the interrelationship between GGT and GI cancers.

methodsOnline databases were searched to find relevant studies investigating different GGT levels' effects on the incidence of GI cancers including colorectal, esophageal, liver, pancreas, gastric, and biliary duct cancers. Random-effect meta-analysis was conducted to pool the hazard ratios (HRs) of GGT quartiles (Qs) effect on cancer incidence.

resultsA total of 26 studies were included in the final review, 12 of which underwent meta-analysis that investigated 11 million patients. Based on the meta-analysis, Q4 patients had a 69% higher hazard of GI cancer incidence (HR 1.69, 95% CI 1.41-2.02, p-value < 0.001). The hazard ratio significance was also similar for Q3 (HR 1.22, 95% CI 1.15-1.30, p-value < 0.001) and Q2 (HR 1.10, 95% CI 1.05-1.16, p-value =0.002) of GGT. Colorectal and liver cancers showed a higher hazard ratio among Q2, Q3, and Q4 of GGT compared to Q1. In pancreas and bile duct cancers, only Q4 of GGT had significantly higher HR. Q3 and Q4 of GGT levels had statistically significant associations with gastric cancer incidence.

conclusionHigher GGT levels correlate with higher rates of GI cancer incidence, especially in colorectal and hepatic cancers. Future studies should investigate this biomarker's potential role in risk assessment for digestive cancers.

Indexed as

Biomarkers, Tumorgamma-GlutamyltransferaseGastrointestinal NeoplasmsHumansIncidenceRisk FactorsBiomarkers, Tumorgamma-Glutamyltransferasegamma-glutamyltransferase, humancancergamma‐glutamyl transferase (GGT)gastrointestinalincidencemeta‐analysissystematic review

Identifiers

PMID39817495
PMCPMC11736428

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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.