Evidence map›Paper›PMID 32441476›Full record

ArticleObesity (Silver Spring, Md.)2020

The Mitigating Effect of Phentermine and Topiramate on Weight Regain After Roux-en-Y Gastric Bypass Surgery.

Nawfal W Istfan, Wendy A Anderson, Donald T Hess, Liqun Yu, Brian Carmine, Caroline M Apovian

Open access · greenAbstract read
In one paragraph

Article in Obesity (Silver Spring, Md.), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 2 pooled it
4.3field-weighted citation impact, top 5% 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

23 citing papers in PubMed, 2 syntheses or guidelines pooled it, 43 citations in OpenAlex.

  1. Guideline
  2. Obesity in South and Southeast Asia-A new consensus on care and management.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2023
    Guideline
  3. Review
  4. Pharmacotherapy and metabolic/bariatric surgery: either or both?International journal of obesity (2005) · 2025
    Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Nawfal W IstfanSection of Endocrinology, Diabetes, Nutrition, and Weight Management, Department of Medicine, School of Medicine, Boston University/Boston Medical Center, Boston, Massachusetts, USA.ORCID 0000-0001-7163-8309
Wendy A AndersonSection of Minimally Invasive Surgery, Department of Surgery, School of Medicine, Boston University /Boston Medical Center, Boston, Massachusetts, USA.ORCID 0000-0002-8498-5884
Donald T HessSection of Minimally Invasive Surgery, Department of Surgery, School of Medicine, Boston University /Boston Medical Center, Boston, Massachusetts, USA.ORCID 0000-0003-2464-5025
Liqun YuSection of Endocrinology, Diabetes, Nutrition, and Weight Management, Department of Medicine, School of Medicine, Boston University/Boston Medical Center, Boston, Massachusetts, USA.ORCID 0000-0002-2140-2063
Brian CarmineSection of Minimally Invasive Surgery, Department of Surgery, School of Medicine, Boston University /Boston Medical Center, Boston, Massachusetts, USA.ORCID 0000-0002-5329-3447
Caroline M ApovianSection of Endocrinology, Diabetes, Nutrition, and Weight Management, Department of Medicine, School of Medicine, Boston University/Boston Medical Center, Boston, Massachusetts, USA.ORCID 0000-0002-8029-1922
Boston University · US

Funding

Transgenic CoreP30DK046200 · NIDDK · TUFTS MEDICAL CENTER · PI CORKEY, BARBARA E. · 1992 to 2021
$25.0M
NIDDK NIH HHS P30 DK046200NIDDK NIH HHS P30DK046200
6 · The paper itself

Abstract

objectiveWeight regain (WR) after Roux-en-Y gastric bypass surgery (RYGB) starts to occur 2 years after surgery, ultimately affecting at least 25% of patients. A limited number of studies have evaluated the impact of antiobesity medications (AOMs) on this phenomenon.

methodsThis study reviewed the electronic medical records of 1,196 patients who underwent RYGB between 2004 and 2015. WR was evaluated by comparing each patient's weight during subsequent postoperative office visits to nadir weight (lowest weight after RYGB, n = 760), taking into consideration the interval during which WR occurred. Patients who were prescribed AOMs and came to follow-up visits were classified as adherent users, whereas those who missed their follow-up visits were considered nonadherent. This study used a linear mixed model, Cox regression, and generalized equation estimator to determine the impact of AOMs on WR trajectory, hazard ratio for time to event, and odds ratio for repeated event occurrence, respectively.

resultsDespite the lack of a unified protocol for using AOMs, the three statistical models converged to show that phentermine and topiramate, used individually or in combination, can significantly reduce WR after RYGB.

conclusionsPhentermine and topiramate are effective in mitigating WR after RYGB. Further studies are needed to help ascertain optimal use of AOMs after bariatric surgery.

Indexed as

AdultAnti-Obesity AgentsFemaleGastric BypassHumansMaleMiddle AgedPhenterminePostoperative PeriodRetrospective StudiesTopiramateWeight GainAnti-Obesity AgentsPhentermineTopiramate

Identifiers

PMID32441476
PMCPMC7250052
OpenAlexW3026912833

What OpenQuestion holds

Textmetadata
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.