Cited by 79Bariatric Surgery and OutcomesBone health and osteoporosis researchBone Metabolism and Diseases

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Changes in Bone Mineral Density in Women Following 1-Year Gastric Bypass Surgery

Casagrande, Daniela Schaan, Repetto, Giuseppe, Mottin, Claudio Corá, Shah, Jatin, Pietrobon, Ricardo, Worni, Mathias, Schaan, Beatriz D.·2012·Obesity Surgery

DOI 10.1007/s11695-012-0687-z

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Abstract

Background Roux-en-Y gastric bypass (RYGB) surgery is the gold standard surgical treatment for obesity. However, unintended nutritional deficiencies following this surgery are common, including changes in bone metabolism. We assessed changes in bone mineral density (BMD), nutritional compounds, and bone resorption markers before and 1 year following RYGB surgery.Methods Our study included 22 female patients with class II/III obesity. A clinical questionnaire, a 24-h recall, blood and urine samples, and dual-energy X-ray absorptiometry were provided.Results Mean age was 37.2 ± 9.6 years; 86 % were Caucasian and 77.2 % were premenopausal. Mean preoperative body mass index was 44.4 ± 5.0 and 27.5 ± 4.5 kg/m(2) at 1-year follow-up (p < 0.001). 25-OH-vitamin D-levels were similar in both periods [11.7 (9.7-18.0) vs. 15.7 (10.2-2.7) pg/dL, p = 0.327]. Serum N-telopeptide (16.3 ± 3.4 vs. 38.2 ± 7.0 nM BCE, p < 0.001) and parathyroid hormone (45.4 ± 16.7 vs. 62.7 ± 28.9 pg/mL, p = 0.026) increased after RYGB surgery, reflecting bone resorption. BMD decreased after RYGB surgery in the lumbar spine (1.13 ± 0.11 vs. 1.04 ± 0.09 g/cm(2), p = 0.001), femoral neck (1.03 ± 0.15 vs. 0.94 ± 0.16 g/cm(2), p = 0.001), and total femur (1.07 ± 0.11 vs. 0.97 ± 0.15 g/cm(2), p = 0.003).Conclusions Decreased BMD in the lumbar spine, femoral neck, and total femur is detectable in women 1 year after RYGB surgery. Calcium malabsorption, caused by vitamin D deficiency and increased bone resorption, is partially responsible for these outcomes and should be targeted in future clinical trials.

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Authors: Casagrande, D. S., Repetto, G., Mottin, C. C., Shah, J., Pietrobon, R., Worni, M., & Schaan, B. D.
Affiliations: Universidade Federal do Rio Grande do Sul (BR)
Pontifícia Universidade Católica do Rio Grande do Sul (BR)
Duke University (US)
Corresponding author: Schaan, Beatriz D.
ORCID: Casagrande, Daniela Schaan
Shah, Jatin
Pietrobon, Ricardo
Worni, Mathias
Schaan, Beatriz D.
Venue: Obesity Surgery
Publisher: Springer Science and Business Media LLC
Published: 2012-06-13
Volume: 22
Issue: 8
Pages: 1287-1292
ISSN: 0960-8923 (ISSN-L)
1708-0428
DOI: 10.1007/s11695-012-0687-z
OpenAlex: W1998242188
Cited by: 79
References: 46
Citations by year: 2026: 1 · 2025: 2 · 2024: 1 · 2022: 3 · 2021: 5 · 2020: 8 · 2019: 4 · 2018: 6 · 2017: 7 · 2016: 10 · 2015: 9 · 2014: 12 · 2013: 11
FWCI: 10.42
Type: journal article
Language: en
Update notices: correction (2015-07-15)
Open access: closed
Licence: www.springer.com/tdm (tdm)
Locations: Obesity Surgery (publishedVersion)
PubMed (publishedVersion)
Funders: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Topics: Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
Keywords: Roux-en-Y gastric bypass, bariatric surgery
MeSH terms: Adult, Bone Resorption, Brazil, Calcium, Dietary, Female, Femur, Follow-Up Studies, Humans, Lumbar Vertebrae, Obesity, Morbid, Prospective Studies, Surveys and Questionnaires, Vitamin D Deficiency, Gastric Bypass, Weight Loss, Absorptiometry, Photon, Bone Density, Body Mass Index, Premenopause

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Changes in Bone Mineral Density in Women Following 1-Year Gastric Bypass Surgery

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