Trial reportObesity surgery2020
Body Composition Changes Following a Very-Low-Calorie Pre-Operative Diet in Patients Undergoing Bariatric Surgery.
Trial report in Obesity surgery, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 3 of them syntheses that pooled 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.
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.
Who cites it
21 citing papers in PubMed, 3 syntheses or guidelines pooled it, 38 citations in OpenAlex.
- Low-energy diets before metabolic bariatric surgery: A systematic review of the effect on total body weight, liver volume, glycemia and side effects.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2025Pooled it
- Pooled it
- Nutrition, Physical Activity, and Prescription of Supplements in Pre- and Post-bariatric Surgery Patients: An Updated Comprehensive Practical Guideline.Obesity surgery · 2023Guideline
- Changes of body composition through an athlete-specific dietary guidance professional track and field athletes: a randomized controlled study.Journal of the International Society of Sports Nutrition · 2026Trial
- Effectiveness and Tolerability of a Two-Week Hypocaloric Protein-Rich Diet Prior to Obesity Surgery with Two Different Diet Interventions: a Prospective Randomized Trial.Obesity surgery · 2022Trial
- Preoperative Weight Loss: Helpful, Harmful or Irrelevant?Obesity surgery · 2026Article
- [Preoperative low-calorie diets for patients with a body mass index > 30 kg/mChirurgie (Heidelberg, Germany) · 2026Article
- Implementation of Preoperative Very Low-Calorie Diets in Preparation for Metabolic and Bariatric Surgery.Journal of nutrition and metabolism · 2026Review
- Regulation of metabolic pathways genes and the effects of very low-calorie diet on insulin resistance and fatty acid profiles in obese patients undergoing bariatric surgery.Journal of diabetes and metabolic disorders · 2025Article
- Preoperative Nutrition in Bariatric Surgery: A Narrative Review on Enhancing Surgical Success and Patient Outcomes.Nutrients · 2025Review
- Nutrition to Enhance Metabolic-Bariatric Surgery Outcomes.Obesity surgery · 2024Article
- Obesity and malnutrition in children and adults: A clinical review.Obesity pillars · 2023Review
- Impact of preoperative weight loss achieved by gastric balloon on peri- and postoperative outcomes of bariatric surgery in super-obese patients: a retrospective matched-pair analysis.Langenbeck's archives of surgery · 2022Article
- The Impact of Bariatric Surgery on the Muscle Mass in Patients with Obesity: 2-Year Follow-up.Obesity surgery · 2022Observational
- Effects of a 3-Week Hospital-Controlled Very-Low-Calorie Diet in Severely Obese Patients.Nutrients · 2021Article
- Nutritional Management in Bariatric Surgery Patients.International journal of environmental research and public health · 2021Review
- Cyclin-dependent kinase 4/6 inhibitors require an arcuate-to-paraventricular hypothalamus melanocortin circuit to treat diet-induced obesity.American journal of physiology. Endocrinology and metabolism · 2021Article
- Measuring Muscle Mass and Strength in Obesity: a Review of Various Methods.Obesity surgery · 2021Review
- Scientific evidence underlying contraindications to the ketogenic diet: An update.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2020Review
- Establishment of Adequate Nutrient Intake Criteria to Achieve Target Weight Loss in Patients Undergoing Bariatric Surgery.Nutrients · 2020Observational
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundFatty liver in obese patients increases the technical difficulty of bariatric surgery. Pre-operative weight loss with a very-low-calorie diet (VLCD) is commonly used to facilitate surgery. Few studies have quantified the systemic effect of rapid pre-operative weight loss on body composition. The objective of this study is to evaluate body composition changes in bariatric surgery patients undergoing a VLCD.
methodsBody composition assessments were performed between August 2017 and January 2019 using dual-energy X-ray absorptiometry immediately before and after a 2-week VLCD at St Vincent's Hospital Melbourne. Data collected prospectively pre- and post-VLCD included total body weight, excess body weight, body mass index (BMI), lean body mass (LBM), fat mass (FM) and bone mineral content (BMC). The pre- and post-operative results were compared.
resultsForty-four patients completed both the 2-week VLCD and body composition assessments. Following a 2-week VLCD, patients lost a mean of 4.5 kg (range - 0.3 to 9.5) in a total body weight and 8.8% (range - 0.9 to 17.1) of excess body weight, with a mean reduction in body mass index of 1.6 kg/m
conclusionA VLCD is an effective tool for pre-operative weight reduction. In this cohort, a large amount of the total weight loss was attributed to a loss of lean body mass. The impact of significant lean body mass loss and its relationship to short- and long-term health outcomes warrants further assessment.
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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 Socratic graph.