Evidence map›Paper›PMID 31965161›Full record

Trial reportThe Journal of clinical endocrinology and metabolism2020

Implications of the Hemoglobin Glycation Index on the Diagnosis of Prediabetes and Diabetes.

Daniel S Hsia, Neda Rasouli, Anastassios G Pittas, Christine W Lary, Anne Peters, Michael R Lewis, Sangeeta R Kashyap, Karen C Johnson, Erin S LeBlanc, Lawrence S Phillips and 3 more

Open access · bronzeAbstract readClinical TrialMulticenter Study
In one paragraph

Trial report in The Journal of clinical endocrinology and metabolism, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
3.1field-weighted citation impact, top 7% 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

31 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.

  1. Cardiovascular Safety Profile of Semaglutide and Variations by Sex, Race, and Kidney Function: A Systematic Review and Meta-analysis.American journal of cardiovascular drugs : drugs, devices, and other interventions · 2025 · on this map
    Pooled it
  2. Article
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  5. Determining A1C Normal Values in Rhesus Macaques (Macaca mulatta).Journal of the American Association for Laboratory Animal Science : JAALAS · 2025
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  7. Review
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  16. Evaluating HbAScientific reports · 2024
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

13 authors at 20 institutions in 1 country.

Daniel S HsiaPennington Biomedical Research Center, Baton Rouge, Louisiana.
Neda RasouliUniversity of Colorado, School of Medicine and VA Eastern Colorado Health Care System, Aurora, Colorado.
Anastassios G PittasTufts Medical Center, Boston, Massachusetts.
Christine W LaryCenter for Outcomes Research and Evaluation, Maine Medical Center Research Institute, Portland, Maine.
Anne PetersKeck School of Medicine of the University of Southern California, Los Angeles, California.
Michael R LewisDepartment of Pathology and Laboratory Medicine, University of Vermont, Burlington, Vermont.
Sangeeta R KashyapCleveland Clinic, Cleveland, Ohio.
Karen C JohnsonUniversity of Tennessee Health Science Center, Memphis, Tennessee.
Erin S LeBlancKaiser Permanente Center for Health Research NW, Portland, Oregon.
Lawrence S PhillipsAtlanta VA Medical Center, Decatur, Georgia and Emory University School of Medicine, Atlanta, Georgia.
James M HempeLouisiana State University Health Sciences Center, New Orleans, Louisiana.
Cyrus V DesouzaOmaha VA Medical Center, University of Nebraska Medical Center, Omaha, Nebraska.
D2d Research Group
National Institute of Diabetes and Digestive and Kidney Diseases · USTufts Medical Center · USCleveland Clinic · USDuke Medical Center · USEmory University · USKaiser Permanente Center for Health Research · USMaine Medical Center · USOmaha VA Medical Center · USPennington Biomedical Research Center · USUniversity of Southern California · USUniversity of Tennessee Health Science Center · USUniversity of Vermont · USVA Eastern Colorado Health Care System · USBaylor College of Medicine · USBrigham and Women's Hospital · USHealthPartners · USLouisiana State University Health Sciences Center New Orleans · USMaine Medical Center · USMedical University of South Carolina · USMedStar Good Samaritan Hospital · US

Funding

Vitamin D and Type 2 Diabetes (D2d)U01DK098245 · NIDDK · TUFTS MEDICAL CENTER · PI PITTAS, ANASTASSIOS G · 2013 to 2020
$45.6M
Vitamin D for Type 2 Diabetes (D2D trial)U34DK091958 · NIDDK · TUFTS MEDICAL CENTER · PI PITTAS, ANASTASSIOS G · 2011 to 2012
$792k
NIDDK NIH HHS U01 DK098245NIDDK NIH HHS U34 DK091958
6 · The paper itself

Abstract

objectiveFasting plasma glucose (FPG), 2-hour plasma glucose (2hPG) from a 75-g oral glucose tolerance test (OGTT) and glycated hemoglobin (HbA1c) can lead to different results when diagnosing prediabetes and diabetes. The Hemoglobin Glycation Index (HGI) quantifies the interindividual variation in glycation resulting in discrepancies between FPG and HbA1c. We used data from the Vitamin D and Type 2 Diabetes (D2d) study to calculate HGI, to identify HGI-associated variables, and to determine how HGI affects prediabetes and diabetes diagnosis. MEASUREMENTS: A linear regression equation [HbA1c (%) = 0.0164 × FPG (mg/dL) + 4.2] was derived using the screening cohort (n = 6829) and applied to calculate predicted HbA1c. This was subtracted from the observed HbA1c to determine HGI in the baseline cohort with 2hPG data (n = 3945). Baseline variables plus prediabetes and diabetes diagnosis by FPG, HbA1c, and 2hPG were compared among low, moderate, and high HGI subgroups.

resultsThe proportion of women and Black/African American individuals increased from low to high HGI subgroups. Mean FPG decreased and mean HbA1c increased from low to high HGI subgroups, consistent with the HGI calculation; however, mean 2hPG was not significantly different among HGI subgroups.

conclusionsHigh HGI was associated with Black race and female sex as reported previously. The observation that 2hPG was not different across HGI subgroups suggests that variation in postprandial glucose is not a significant source of population variation in HGI. Exclusive use of HbA1c for diagnosis will classify more Black individuals and women as having prediabetes compared with using FPG or 2hPG.

Indexed as

Administration, OralAgedBlood GlucoseCohort StudiesDiabetes Mellitus, Type 2Dietary SupplementsFastingFemaleGlucose Tolerance TestGlycated HemoglobinHealth Status IndicatorsHumansMaleMiddle AgedPrediabetic StateRisk FactorsBlood GlucoseGlycated HemoglobinVitamin Ddiagnosishemoglobin glycationobservational studyoral glucose tolerance testprediabetestype 2

Identifiers

PMID31965161
PMCPMC7015453
OpenAlexW3002868074

What Socratic holds

Textmetadata
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 Socratic graph.