Obesity has no adverse effect on the outcome of unicompartmental knee arthroplasty at a minimum follow-up of 7 years
ESSKA Academy. cavaignac e. May 12, 2018; 218107; FP41-214
Dr. etienne cavaignac
Dr. etienne cavaignac
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Objectives: The significance of weight in the indication of unicompartmental knee arthroplasty (UKA) is unclear. Our hypothesis was that weight does not affect the long-term survival rate of UKAs.

Methods: We completed a retrospective study of a cohort of 212 UKAs at a mean follow-up of 12 years (range: 7-22). The population was divided according to BMI (Body Mass Index) (above or below 30) and weight (above or below 82 kg). A Kaplan-Meier survivorship analysis was performed and 10-year survival rates were compared between the various sub-groups. Multimodal regression analysis determined the impact of the various theoretical contraindications on the long-term survival rates of UKAs.

Results: Ten-year survival rates were very similar in all the groups (93.5% for weight###82 kg; 92.5% for weight< 82 kg; 92% for BMI>30 and 94% for BMI<30). Multimodal regression analysis revealed that weight plays a part in reducing the risk of revision (relative risk = 0.387 (p=0.662)). The results relating to clinical outcomes were not statistically significant.

Conclusions: This study confirms that weight does not influence the long-term survival rates of UKAs.

UKA, BMI, weigth
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