ArticleInternational journal of colorectal disease2014
Does bariatric surgery change olfactory perception? Results of the early postoperative course.
Article in International journal of colorectal disease, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.
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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.
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Who cites it
13 citing papers in PubMed, 2 syntheses or guidelines pooled it, 28 citations in OpenAlex.
- Obesity, Olfaction and Cognition: A Systematic Review.Current obesity reports · 2025Pooled it
- Taste Changes after Bariatric Surgery: a Systematic Review.Obesity surgery · 2018Pooled it
- Gross Olfaction Before and After Laparoscopic Gastric Bypass.Obesity surgery · 2017Trial
- The Role of the Olfactory System in Obesity and Metabolism in Humans: A Systematic Review and Meta-Analysis.Metabolites · 2023Review
- International consensus statement on allergy and rhinology: Olfaction.International forum of allergy & rhinology · 2022Review
- Early Postoperative Exposure to High-Fat Diet Does Not Increase Long-Term Weight Loss or Fat Avoidance After Roux-en-Y Gastric Bypass in Rats.Frontiers in nutrition · 2022Article
- Food Neophobia, Odor and Taste Sensitivity, and Overall Flavor Perception in Food.Foods (Basel, Switzerland) · 2021Article
- Olfactory and Gustatory Function before and after Laparoscopic Sleeve Gastrectomy.Medicina (Kaunas, Lithuania) · 2021Article
- Article
- Review
- Obesity, body weight regulation and the brain: insights from fMRI.The British journal of radiology · 2018Article
- Fat Sensation: Fatty Acid Taste and Olfaction Sensitivity and the Link with Disinhibited Eating Behaviour.Nutrients · 2017Article
- Olfactory and Gustatory Function After Bariatric Surgery.Obesity surgery · 2015Article
Corrections and comments
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Authors and funding
8 authors at 4 institutions in 3 countries.
Funding
Abstract
purposeChanges of food preference toward foods with low caloric density have been demonstrated after bariatric surgery and may contribute to sustained body weight loss. It has been hypothesized that olfactory perception as an integral part of food selection might be altered after bariatric surgery.
methodsSniffin' Sticks® were used to investigate the olfactory perception of morbidly obese patients undergoing either Roux-en-Y gastric bypass (RYGB, n = 15) or sleeve gastrectomy (SG, n = 15) before 1, 6, 12, and 24 weeks after surgery. Obese patients without surgical intervention served as controls (CG, n = 12). Results are presented using the testing odor threshold, discrimination, and identification score (TDI; higher scores indicate better olfactory perception). Body weight loss was recorded.
resultsInitial BMI of the SG group (56.04 ± 7.096 kg m(-2)) was higher compared to the BMI of the RYGB (48.71 ± 6.49 kg m(-2)) and CG (50.35 ± 6.78 kg m(-2)); p = 0.011. Body weight loss among the surgical groups was not different (p = 0.011) while controls did not lose weight. Mean baseline TDI scores were significantly lower in the SG group 27.1 ± 3.9 vs. 32.6 ± 3.6 (RYGB) and 32.1 ± 5.3 (CG), respectively, whereas there were after 24 weeks no changes in RYGB and CG patients; the TDI score in the SG group increased significantly to 31.1 ± 3.5 (p < 0.01).
conclusionsOur data suggest that a substantial body weight loss per se does not affect olfactory perception. However, our results point towards improved olfactory perception after sleeve gastrectomy but not Roux-en-Y gastric bypass.
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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.