Evidence map›Paper›PMID 30892414›Full record

Observational studyClinics (Sao Paulo, Brazil)2019

Very low-calorie diet in candidates for bariatric surgery: change in body composition during rapid weight loss.

Marcela Pires Serafim, Marco Aurelio Santo, Alexandre Vieira Gadducci, Veruska Magalhães Scabim, Ivan Cecconello, Roberto de Cleva

Open access · goldAbstract readObservational Study
In one paragraph

Observational study in Clinics (Sao Paulo, Brazil), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
1.7field-weighted citation impact, top 16% 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 24 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Dietitian-led very low-calorie diet for preoperative rehabilitation in patients with obesity awaiting non-bariatric elective laparoscopic surgery: A retrospective study.Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition · 2026
    Article
  5. Review
  6. Review
  7. Review
  8. Preoperative glycemic response to a very low-calorie diet predicts long-term type 2 diabetes remission after bariatric surgery.Arquivos brasileiros de cirurgia digestiva : ABCD = Brazilian archives of digestive surgery · 2025
    Article
  9. Challenges in the care and treatment of patients with extreme obesity.Archives of endocrinology and metabolism · 2024
    Review
  10. Review
  11. Increased HepaticInternational journal of molecular sciences · 2023
    Article
  12. Review
  13. Non-Surgical Interventions for Hospitalized Adults with Class II or Class III Obesity: A Scoping Review.Diabetes, metabolic syndrome and obesity : targets and therapy · 2021
    Article
  14. Observational
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 1 institution in 1 country.

Marcela Pires SerafimUnidade de Cirurgia Bariatrica e Metabolica, Disciplina de Cirurgia Gastrointestinal, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, SP, BR.ORCID 0000-0001-9403-0339
Marco Aurelio SantoORCID 0000-0002-7813-6210
Alexandre Vieira GadducciORCID 0000-0002-9160-2941
Veruska Magalhães ScabimORCID 0000-0002-4750-7197
Pontifícia Universidade Católica de São Paulo · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo analyze the changes in the body composition of morbidly obese patients induced by a very low-calorie diet.

methodsWe evaluated 120 patients selected from a university hospital. Body composition was assessed before and after the diet provided during hospitalization, and changes in weight, body mass index, and neck, waist and hip circumferences were analyzed. Bioimpedance was used to obtain body fat and fat-free mass values. The data were categorized by gender, age, body mass index and diabetes diagnosis.

resultsThe patients consumed the diet for 8 days. They presented a 5% weight loss (without significant difference among groups), which represented an 85% reduction in body fat. All changes in body circumference were statistically significant. There was greater weight loss and a greater reduction of body fat in men, but the elderly showed a significantly higher percentage of weight loss and greater reductions in body fat and fat-free mass. Greater reductions in body fat and fat-free mass were also observed in superobese patients. The changes in the diabetic participants did not differ significantly from those of the non-diabetic participants.

conclusionsThe use of a VLCD before bariatric surgery led to a loss of weight at the expense of body fat over a short period, with no significant differences in the alteration of body composition according to gender, age, body mass index and diabetes status.

Indexed as

Bariatric SurgeryBody CompositionAge FactorsBody Mass IndexDiabetes MellitusDiet, ReducingFemaleHipHospitalizationHumansMaleMiddle AgedNeckObesity, MorbidPreoperative CareProspective Studies

Identifiers

PMID30892414
PMCPMC6399661
OpenAlexW2922475254

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.