Evidence map›Paper›PMID 42334457›Full record

ArticleJournal of diabetes investigation2026

Protein consumption during pregnancy and risk of gestational diabetes mellitus: Insights from a multi-center case-control study.

Marzieh Zare, Elnaz Daneshzad, Hatav Tehrani, Razieh Tabaeifard, Maryam Mahmoudi, Leila Azadbakht

Abstract readMulticenter Study
In one paragraph

Article in Journal of diabetes investigation, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed
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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

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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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

6 authors.

Marzieh ZareDepartment of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.ORCID https://orcid.org/0009-0004-8744-7231
Elnaz DaneshzadNon-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran.ORCID https://orcid.org/0000-0003-1400-8532
Hatav TehraniDepartment of Obstetrics and Gynecology, Isfahan University of Medical Sciences, Isfahan, Iran.
Razieh TabaeifardDepartment of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
Maryam MahmoudiDepartment of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
Leila AzadbakhtDepartment of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.ORCID https://orcid.org/0000-0002-5955-6818

Funding

Tehran University of Medical Sciences and Health Services IR; 1401-4-212-62786
6 · The paper itself

Abstract

aimsGestational diabetes mellitus (GDM) poses major health risks for mothers and infants. Evidence on the association between dietary protein intake and GDM risk remains inconsistent. This study investigated dietary protein quantity and quality in relation to GDM.

methodsA hospital-based case-control study was conducted in Isfahan, Iran, involving 200 cases and 263 controls. Dietary intake was assessed using three 24-h dietary records, and protein intake was categorized into plant- and animal-based sources. Multivariate logistic regression models were applied to evaluate associations.

resultsHigher plant protein intake was associated with a significantly lower risk of GDM (OR = 0.34; 95% CI: 0.20-0.59). Similarly, higher seafood (OR = 0.40; 95% CI: 0.24-0.68) and egg intake (OR = 0.59; 95% CI: 0.35-0.98) were inversely associated with GDM risk. In contrast, total protein, animal protein, poultry, dairy protein, aromatic amino acids, and branched-chain amino acids showed no significant or meaningful trend with GDM risk.

conclusionsOur study did not identify significant associations between total or animal protein intake during pregnancy and GDM risk. However, higher consumption of plant protein, seafood, and eggs was associated with lower odds of GDM in multivariable-adjusted models that accounted for BMI, total energy intake, socioeconomic status, and other relevant confounders. Given the observational case-control design, these findings cannot establish causality, and the possibility of residual confounding remains. Nevertheless, the results suggest that protein-intake quality may play a role in GDM risk, warranting confirmation in prospective cohorts and randomized trials.

Indexed as

Diabetes, GestationalDietDietary ProteinsAdultCase-Control StudiesFemaleFollow-Up StudiesHumansIranPregnancyPrognosisRisk FactorsDietary Proteinsdiabetespregnancyproteins

Identifiers

PMID42334457
PMCPMC13398640

What Socratic holds

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LicenceCC BY-NC-ND
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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 Socratic graph.