Does BMI influence clinical outcomes after total knee arthroplasty?
Kiriakos Daniilidis1, Daiwei Yao1, Georg Gosheger2
1Department of Orthopaedic Surgery, Annastift Hannover (Medical School Hannover, MHH), Germany.
Obesity did not negatively impact total knee arthroplasty (TKA) outcomes in German patients. While infection and instability were noted, clinical scores showed no significant differences across BMI groups.
Area of Science:
- Orthopedics
- Knee Surgery
- Obesity Research
Background:
- Obesity is prevalent in Western Europe and linked to gonarthrosis.
- Understanding outcomes for obese patients undergoing total knee arthroplasty (TKA) is crucial.
Purpose of the Study:
- To evaluate the clinical outcomes of German obese patients following TKA.
- To assess the correlation between Body-Mass-Index (BMI) and TKA results.
Main Methods:
- Retrospective study of 199 patients (230 TKAs) between 2001-2009.
- Patients categorized into four BMI groups: <25, 25-30, 30-40, and >40 kg/m2.
- Clinical outcomes assessed using Knee Society Score (KSS), Hospital for Special Surgery (HSS) score, and Visual Analogue Scale (VAS), along with complication and satisfaction data.
Main Results:
- No significant differences in KSS, HSS, or VAS scores were observed between BMI subgroups.
- Statistically significant increases in infection and instability were noted across all BMI subgroups (p>0.01).
Conclusions:
- Infection and instability can negatively impact TKA outcomes.
- Obesity itself does not show a significant correlation with poorer clinical outcomes after TKA.
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