Bariatric surgery prior to total knee arthroplasty is not associated with lower risk of revision: a register-based study of 441 patients

Perna Ighani Arani; Per Wretenberg; Johan  Ottosson; Otto Robertsson; Annette W-Dahl

doi:10.1080/17453674.2020.1840829

Bariatric surgery prior to total knee arthroplasty is not associated with lower risk of revision: a register-based study of 441 patients

Authors

Perna Ighani Arani Department of Orthopedics, Orebro University Hospital; Faculty of Medicine and Health, School of Medical Sciences, Örebro University, Örebro
Per Wretenberg Department of Orthopedics, Orebro University Hospital; Faculty of Medicine and Health, School of Medical Sciences, Örebro University, Örebro
Johan Ottosson Faculty of Medicine and Health, School of Medical Sciences, Örebro University, Örebro; Department of Surgery, Örebro University Hospital; Scandinavian Obesity Surgery Registry, Örebro
Otto Robertsson Lund University, Faculty of Medicine, Department of Clinical Sciences Lund, Orthopedics, Lund; The Swedish Knee Arthroplasty Register, Lund, Sweden
Annette W-Dahl Lund University, Faculty of Medicine, Department of Clinical Sciences Lund, Orthopedics, Lund; The Swedish Knee Arthroplasty Register, Lund, Sweden

DOI:

https://doi.org/10.1080/17453674.2020.1840829

Abstract

Background and purpose — Obesity is a considerable medical challenge in society. We investigated the risk of revision for any reasons and for infection in patients having total knee arthroplasty (TKA) for osteoarthritis (OA) within 2 years after bariatric surgery (BS) and compared them with TKAs without BS.

Patients and methods — We used the Scandinavian Obesity Surgery Registry (SOReg) and the Swedish Knee Arthroplasty Register (SKAR) to identify patients operated on in 2009–2019 with BS who had had primary TKA for OA within 2 years after the BS (BS group) and compared them with TKAs without prior BS (noBS group). We determined adjusted hazard ratio (HR) for the BS group and noBS group using Cox proportional hazard regression for revision due to any reasons and for infection. Adjustments were made for sex, age groups, and BMI categories preoperatively.

Results — 441 patients were included in the BS group. The risk of revision for infection was higher for the BS group with HR 2.2 (95% CI 1.1–4.7) adjusting for BMI before the TKA, while the risk of revision for any reasons was not statistically significant different for the BS group with HR 1.3 (CI 0.9–2.1). Corresponding figures when adjusting for BMI before the BS were HR 0.9 (CI 0.4–2) and HR 1.2 (CI 0.7–2).

Interpretation — Our findings did not indicate that BS prior to TKA was associated with lower risk of revision.

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Published

2020-11-04

How to Cite

Ighani Arani, P., Wretenberg, P., Ottosson, J. ., Robertsson, O., & W-Dahl, A. (2020). Bariatric surgery prior to total knee arthroplasty is not associated with lower risk of revision: a register-based study of 441 patients. Acta Orthopaedica, 92(1), 96–100. https://doi.org/10.1080/17453674.2020.1840829

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Issue

Acta Orthopaedica, Volume 92, Issue 1 (2021)

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Articles

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Acta Orthopaedica (Scandinavica) content is available freely online as from volume 1, 1930. The journal owner owns the copyright for all material published until volume 80, 2009. As of June 2009, the journal has however been published fully Open Access, meaning the authors retain copyright to their work. As of June 2009, articles have been published under CC-BY-NC or CC-BY licenses, unless otherwise specified.