ArticleCureus2025
Impact of Obesity and Preoperative Knee Subcutaneous Fat Indices as Predictors of Postoperative Functional Outcomes Following Total Knee Arthroplasty: A Comprehensive Retrospective Review.
Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
introductionTotal knee arthroplasty (TKA) effectively relieves pain and improves functional capacity in end-stage knee osteoarthritis (OA). However, the influence of obesity, particularly as measured by body mass index (BMI), on TKA outcomes remains a subject of debate. This study aimed to investigate the relationship between BMI, knee subcutaneous fat measurements, and postoperative functional outcomes following TKA.
methodsA retrospective analysis was conducted that included 100 patients (31 men and 69 women) who underwent primary TKA at a single university hospital. Patients were categorized based on BMI (kg/m
resultsThe majority of patients were women (69%), with no significant BMI difference between genders. The surgical indication was predominantly OA, with a higher frequency seen in groups with BMI ≥30. Patients with a higher BMI underwent TKA at a younger age (p<0.00001). There was no significant difference in postoperative FJS-12 and flexion scores among BMI groups. Correlation analysis showed weak positive correlations between BMI/subcutaneous fat indices and functional outcomes. In addition, complication rates were low, with no reported infections.
conclusionObesity did not independently affect TKA outcomes, with equivalent results observed across BMI groups. However, a higher BMI correlated with younger age at TKA. BMI and knee subcutaneous fat indices showed a poor predictive value for postoperative functional recovery. This study underscores the increasing proportion of obese patients undergoing TKA and the need for further research to understand the complex relationship between obesity, subcutaneous fat distribution, and TKA outcomes.
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