• Maximilian Budin, T David Luo, Thorsten Gehrke, and Mustafa Citak.
• Department of Orthopaedic Surgery, HELIOS ENDO-Clinic Hamburg, Holstenstraße 2, 22767, Hamburg, Germany.
• Arch Orthop Trauma Surg. 2024 Dec 1; 144 (12): 519151985191-5198.

IntroductionThe purpose of this study was to evaluate the association between the Soft Tissue Radiological Knee (SToRK) Index and the risk of developing a superficial surgical site infection (SSSI) following primary total knee arthroplasty (TKA).MethodsThe SToRK Index was measured using calibrated long leg radiographs (LLR) in 174 patients undergoing TKA.ResultsA moderate correlation was found between the SToRK Index and body mass index (BMI) (rs=0.574; p < 0.001). The SToRK Index was a better predictor of SSSI in females than males. In females, a SToRK Index cutoff of 2.01 had a sensitivity and specificity of 41.3% and 74.6% for developing SSSI, respectively, with a positive likelihood ratio of 1.63.ConclusionThe SToRK Index can be used as an additional tool in assessing the risk for SSSI after TKA. It might be more predictive in females due to the different fat distribution compared to males.© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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