Evidence map›Paper›PMID 21833817›Full record

SynthesisObesity surgery2012

Preoperative predictors of weight loss following bariatric surgery: systematic review.

Masha Livhits, Cheryl Mercado, Irina Yermilov, Janak A Parikh, Erik Dutson, Amir Mehran, Clifford Y Ko, Melinda Maggard Gibbons

3 registry-linked trialsAbstract readSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Obesity surgery, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 291 papers, 9 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
291citing papers in PubMed, 9 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.

NCT02302898 completednot on this mapstarted 2015, after this paper: background citation

Characteristics Associated With Weight Regain After Roux-en-Y Gastric Bypass

TypeobservationalSponsorWashington University School of MedicineRan2015 to 2016Enrolled2ConditionsObesityArmsEating Behavior Evaluation, Measurement of Functional gastric volume, Measurement of gastric pouch and GJ size
NCT03092479 nacompletednot on this mapstarted 2017, after this paper: background citation

A Randomized Trial of a Pilot Behavioral Support Intervention After Bariatric Surgery

TypeinterventionalSponsorGeisinger ClinicRan2017 to 2017Enrolled50ConditionsObesityArmsBehavioral Intervention
NCT04035512 naunknown statusnot on this mapstarted 2019, after this paper: background citation

The "Expressive Writing" as Psychological Intervention in Bariatric Population. Prospective Longitudinal Multi Centric Study

TypeinterventionalSponsorUniversity of Roma La SapienzaRan2019 to 2020Enrolled136ConditionsBariatric Surgery CandidateArmsExpressive writing
3 · Its place in the literature

Who cites it

291 citing papers in PubMed, 9 syntheses or guidelines pooled it.

  1. Experienced Weight Stigma Changes Following Bariatric Surgery: a Systematic Review and Meta-Analysis.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2026
    Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Pooled it
  6. Pooled it
  7. Pooled it
  8. Pooled it
  9. Pooled it
  10. Trial
  11. Trial
  12. Trial
  13. Trial
  14. Trial
  15. Trial
  16. Trial
  17. Review
  18. Article
  19. Article
  20. Article

231 more citing papers are in PubMed but not listed here.

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

8 authors.

Masha LivhitsDepartment of Surgery, David Geffen School of Medicine at UCLA, 10833 LeConte Ave, 72-215 CHS, Los Angeles, CA 90095, USA. mlivhits@mednet.ucla.edu
Cheryl Mercado
Irina Yermilov
Janak A Parikh
Erik Dutson
Amir Mehran
Clifford Y Ko
Melinda Maggard Gibbons

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundObesity affects 32% of adults in the USA. Surgery generates substantial weight loss, but 20-30% fails to achieve successful weight loss. Our objective was to identify preoperative psychosocial factors associated with weight loss following bariatric surgery.

methodsWe performed a literature search of PubMed® and the Cochrane Database of Reviews of Effectiveness between 1988 and April 2010. Articles were screened for bariatric surgery and weight loss if they included a preoperative predictor of weight loss: body mass index (BMI), preoperative weight loss, eating disorders, or psychiatric disorder/substance abuse. One thousand seven titles were reviewed, 534 articles screened, and 115 included in the review.

resultsFactors that may be positively associated with weight loss after surgery include mandatory preoperative weight loss (7 of 14 studies with positive association). Factors that may be negatively associated with weight loss include preoperative BMI (37 out of 62 studies with negative association), super-obesity (24 out of 33 studies), and personality disorders (7 out of 14 studies). Meta-analysis revealed a decrease of 10.1% excess weight loss (EWL) for super-obese patients (95% confidence interval (CI) [3.7-16.5%]), though there was significant heterogeneity in the meta-analysis, and an increase of 5.9% EWL for patients with binge eating at 12 months after surgery (95% CI [1.9-9.8%]).

conclusionsFurther studies are necessary to investigate whether preoperative factors can predict a clinically meaningful difference in weight loss after bariatric surgery. The identification of predictive factors may improve patient selection and help develop interventions targeting specific needs of patients.

Indexed as

Bariatric SurgeryWeight LossBody Mass IndexFeeding and Eating DisordersFemaleFollow-Up StudiesHumansMaleObesity, MorbidPatient SatisfactionPersonality DisordersPredictive Value of TestsPreoperative PeriodPsychiatric Status Rating ScalesRisk FactorsSubstance-Related Disorders

Identifiers

PMID21833817

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

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.