ArticleObesity surgery2017
Patients' Preoperative Estimate of Target Weight and Actual Outcome after Bariatric Surgery.
Article in Obesity surgery, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.
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Who cites it
8 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- What Is Weight Loss After Bariatric Surgery Expressed in Percentage Total Weight Loss (%TWL)? A Systematic Review.Obesity surgery · 2021Pooled it
- Meta-analysis of the effectiveness of laparoscopic adjustable gastric banding versus laparoscopic sleeve gastrectomy for obesity.Medicine · 2019Pooled it
- Anthropometric Changes and Systemic Inflammation After Sleeve Gastrectomy: Do Composite Markers Reflect the Change?Obesity surgery · 2025Article
- Patients experience with preoperative use of anti-obesity medications and associations with bariatric surgery expectations.Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery · 2025Article
- How Good is Stratification and Prediction Model Analysis Between Primary and Revisional Roux-en-Y Gastric Bypass Surgery? A Multi-center Study and Narrative Review.Obesity surgery · 2023Review
- Women's Reasons to Seek Bariatric Surgery and Their Expectations on the Surgery Outcome - a Multicenter Study from Five European Countries.Obesity surgery · 2022Article
- Motivation and Weight Loss Expectations in Bariatric Surgery Candidates: Association with 1- and 2-Year Results After Bariatric Surgery.Obesity surgery · 2020Observational
- Timing of Maximal Weight Reduction Following Bariatric Surgery: A Study in Chinese Patients.Frontiers in endocrinology · 2020Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundEvidence about the impact of psychological factors on weight loss after bariatric surgery is scarce. This study explores whether patients' preoperative estimate of target weight influences actual weight loss for different types of bariatric procedures.
methodsPatients eligible for bariatric surgery were instructed twice on how to calculate their expected target weight. They were divided into three groups based on their percentage excess weight loss (%EWL) and percentage total body weight loss (%TBWL). Weight loss 12 and 24 months after surgery was analyzed for each group and per type of surgery.
resultsSix hundred fifty-six patients participated in this study. Types of surgery performed were the Roux-en-Y gastric bypass (RYGB, 75%), sleeve gastrectomy (SG, 8.1%), REDO-RYGB (12.5%), and laparoscopic adjustable gastric banding (LAGB, 4.4%). Data of 622 and 410 patients were available for analysis at 12 and 24 months, respectively. Surprisingly, 415 patients (63.3%) overestimated their expected weight loss as opposed to our calculation, based on our own historic data. One hundred thirty-four patients (20.4%) estimated their weight loss correctly and 107 patients (16.3%) underestimated their weight loss. There was a significant higher %EWL 12 months after RYGB surgery for patients who overestimated their weight loss compared to those who estimated their weight loss correctly (p = 0.001). After 24 months and for other types of procedures, no statistically significant differences were found between the three groups.
conclusionDespite instructions on how to calculate target weight, the majority of patients overestimated their weight loss. Actual %EWL 12 months after RYGB surgery might be influenced by setting a low target weight.
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