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Fracture risk after gastric bypass surgery – a retrospective cohort study
Skaraborg Hospital, Skövde, Sweden / University of Gothenburg, Sweden.
Sahlgrenska Academy, University of Gothenburg, Sweden.
Sahlgrenska Academy, University of Gothenburg, Sweden.
Örebro University, Sweden.
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2018 (Engelska)Ingår i: Journal of Bone and Mineral Research, ISSN 0884-0431, E-ISSN 1523-4681, Vol. 33, nr 12, s. 2122-2131Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Gastric bypass surgery constitutes the most common and effective bariatric surgery to treat obesity. Gastric bypass leads to bone loss, but fracture risk following surgery has been insufficiently studied. Furthermore, the association between gastric bypass and fracture risk has not been studied in patients with diabetes, which is a risk factor for fracture and affected by surgery. In this retrospective cohort study using Swedish national databases, 38 971 obese patients undergoing gastric bypass were identified, 7758 with diabetes and 31 213 without. An equal amount of well-balanced controls were identified through multivariable 1:1 propensity score matching. The risk of fracture and fall injury was investigated using Cox proportional hazards and flexible parameter models. Fracture risk according to weight loss and degree of calcium and vitamin D supplementation one-year post- surgery was investigated. During a median follow-up time of 3.1 (IQR 1.7-4.6) years, gastric bypass was associated with increased risk of any fracture, in patients with and without diabetes using a multivariable Cox model (HR 1.26, 95% CI 1.05- 1.53 and HR 1.32, 95% CI 1.18-1.47, respectively). Using flexible parameter models, the fracture risk appeared to increase with time. The risk of fall injury without fracture was also increased after gastric bypass. Larger weight loss or poor calcium and vitamin D supplementation after surgery were not associated with increased fracture risk. In conclusion, gastric bypass surgery is associated with an increased fracture risk, which appears to be increasing with time and not associated with degree of weight loss or calcium and vitamin D supplementation following surgery. An increased risk of fall injury was seen after surgery, which could contribute to the increased fracture risk. This article is protected by copyright. All rights reserved.

Ort, förlag, år, upplaga, sidor
Wiley-Blackwell Publishing Inc., 2018. Vol. 33, nr 12, s. 2122-2131
Nyckelord [en]
Fracture risk assessment, General population studies, Osteoporosis
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Ortopedi
Forskningsämne
Individ och samhälle VIDSOC
Identifikatorer
URN: urn:nbn:se:his:diva-16035DOI: 10.1002/jbmr.3553ISI: 000452301800005PubMedID: 30011091Scopus ID: 2-s2.0-85052618842OAI: oai:DiVA.org:his-16035DiVA, id: diva2:1236780
Tillgänglig från: 2018-08-06 Skapad: 2018-08-06 Senast uppdaterad: 2020-01-29Bibliografiskt granskad

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Lundh, Dan

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