BMI is a Better Predictor of Periprosthetic Joint Infection Risk Than Local Measures of Adipose Tissue After TKA.

The Journal of Arthroplasty
Julia ShearerSimon W Young

Abstract

Both body mass index (BMI) and local measures of adiposity at the surgical site have been identified as independent risk factors for periprosthetic joint infection (PJI) (periprosthetic joint infection) after total knee arthroplasty (TKA). We aimed to 1) evaluate previously used measures of assessing knee adiposity and 2) determine the best measure for predicting both surgical duration and PJI after TKA. We performed a multicentre retrospective review of 4745 patients who underwent primary TKA between January 2013 and December 2016. Patient demographic information, surgical duration and postoperative infection status within one year were obtained. Preoperative weight-bearing AP and lateral x-rays were analyzed to determine prepatellar adipose thickness, bony width of the tibial plateau, and total soft tissue knee width. The knee adipose index (KAI) was calculated from the ratio of bone to total knee width. We observed substantial variability in both local measures of adiposity compared with BMI. Neither measure of local knee adipose showed a significant correlation with PJI risk. By contrast, there was a strong correlation between PJI risk and BMI >35 (odds ratio 2.9, 95% CI 1.4-6.1). Surgical duration increased with both BMI a...Continue Reading

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Citations

Apr 24, 2021·The Journal of Arthroplasty·Eric S SecristThomas K Fehring
May 29, 2021·The Journal of Bone and Joint Surgery. American Volume·Thomas K FehringAaron J Tande
Jun 24, 2021·Journal of Bone and Joint Infection·Laura Rey FernándezLluís Font-Vizcarra
Sep 5, 2020·Journal of Orthopaedic Science : Official Journal of the Japanese Orthopaedic Association·Mitsuru HanadaYukihiro Matsuyama

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