Evidence map›Paper›PMID 25661984›Full record

ArticleDiabetes research and clinical practice2015

Comparative effectiveness of early versus delayed metformin in the treatment of type 2 diabetes.

Robert J Romanelli, Sukyung Chung, Jia Pu, Vani Nimbal, Beinan Zhao, Latha Palaniappan

Open access · greenAbstract read
In one paragraph

Article in Diabetes research and clinical practice, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
1.1field-weighted citation impact, top 20% 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

9 citing papers in PubMed, 16 citations in OpenAlex.

  1. Article
  2. Therapeutic Inertia in an Insured Population with Type 2 Diabetes in the United States: A Retrospective Cohort Study.Diabetes therapy : research, treatment and education of diabetes and related disorders · 2025
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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

6 authors at 2 institutions in 1 country.

Robert J RomanelliPalo Alto Medical Foundation Research Institute, Palo Alto, CA 94301, United States. Electronic address: romanellir@pamfri.org.
Sukyung ChungPalo Alto Medical Foundation Research Institute, Palo Alto, CA 94301, United States.
Jia PuPalo Alto Medical Foundation Research Institute, Palo Alto, CA 94301, United States.
Vani NimbalPalo Alto Medical Foundation Research Institute, Palo Alto, CA 94301, United States.
Beinan ZhaoPalo Alto Medical Foundation Research Institute, Palo Alto, CA 94301, United States.
Latha PalaniappanPalo Alto Medical Foundation Research Institute, Palo Alto, CA 94301, United States; Stanford University School of Medicine, Stanford, CA 94305, United States.
Palo Alto Institute · USStanford University · US

Funding

Strength Training Regimen fOr Normal weiGht Diabetics (STRONG-D)R01DK081371 · NIDDK · STANFORD UNIVERSITY · PI CHURCH, TIMOTHY STEPHEN, PALANIAPPAN, LATHA P · 2009 to 2018
$6.0M
Measuring and Compensating Primary Care Physician EffortK01HS019815 · AHRQ · PALO ALTO MEDICAL FOUNDATION RES INST · PI CHUNG, SUKYUNG · 2012 to 2016
$804k
AHRQ HHS K01 HS019815AHRQ HHS K01HS019815NIDDK NIH HHS R01 DK081371NIDDK NIH HHS R01DK081371-01A1S1
6 · The paper itself

Abstract

aimThe purpose of this study was to evaluate the effectiveness of early versus delayed initiation of metformin in type 2 diabetes.

methodsWe identified 2925 new users of metformin with type 2 diabetes between 2005 and 2012 in the electronic health records of an integrated health system in Northern California. Patients were matched 1:1 on the propensity for receiving early treatment (defined as ≤6 months from first evidence of diabetes). We evaluated the effectiveness of early versus delayed metformin treatment on intermediate clinical outcomes indicated by changes in hemoglobin A1c (HbA1c) and body mass index (BMI), as well as the incidence of therapy intensification (addition or substitution of a second antihyperglycemic agent).

resultsA total of 2144 propensity-score matched patients were included in the early or delayed treatment group (n=1072, in each). Early treatment was associated with significantly larger decreases in HbA1c (-0.36%; 95% confidence intervals [CI]: -0.44 to -0.27%; P<0.001) and BMI (-0.46 kg/m(2); 95% CI: -0.64 to -0.29 kg/m(2); P<0.001) relative to delayed treatment. Patients receiving early treatment also had a greater likelihood of attaining an HbA1c<7% (<53 mmol/mol) (odds ratio: 2.00; 95% CI: 1.63-2.45; P<0.001) and a reduced risk of therapy intensification (hazard ratio: 0.72; 95% CI: 0.61-0.85; P<0.001).

conclusionsTreatment with metformin earlier in the course of type 2 diabetes is associated with better glycemic control, more pronounced weight reduction, and a lower risk for therapy intensification than delayed treatment. Antihyperglycemic therapy should be initiated early after diagnosis to achieve optimal outcomes.

Indexed as

Blood GlucoseBody Mass IndexDiabetes Mellitus, Type 2FemaleFollow-Up StudiesGlycated HemoglobinHumansHypoglycemic AgentsMaleMetforminMiddle AgedRetrospective StudiesTime FactorsBlood GlucoseGlycated HemoglobinHypoglycemic AgentsMetforminMetforminPharmacotherapyType 2 diabetes

Identifiers

PMID25661984
PMCPMC4388779
OpenAlexW2159939076

What OpenQuestion holds

Texttitle and abstract
LicenceTDM
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.