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Influence of body mass index in revision total knee arthroplasty
Rogério Teixeira de Carvalho1, Diego Benone Santos1, Victor Chammas1
1Hospital do Servidor Público Estadual (HSPE), Orthopedics and Traumatology Service, São Paulo, SP, Brazil.
Objective:
: To evaluate the influence of the body mass index (BMI) on the functional assessment of patients who underwent revision total knee arthroplasty (RTKA).
Methods:
: Thirty patients who un-derwent RTKA between January 2008 and January 2012 were retrospectively assessed using the WOMAC questionnaire. The patients were divided into three groups according to the BMI ca-tegories defined by the World Health Organization (WHO): Group I with normal BMI (18-24.9 Kg/m(2)), with eight patients; Group II, overweight (BMI 25-29.9 Kg/m(2)), with 15 patients, and Group III obesity with BMI ≥ 30 Kg/m(2), with seven patients. The post-ope-rative function scores obtained through the WOMAC questionnaire were compared with the BMI of each group. The statistical analysis between BMI and WOMAC scores was performed with the Spe-arman correlation test.
Results:
: The average functional WOMAC score for individuals in Group I was 16.7; in Group II it was 47.7; and in Group III it was 69.9, with a statistically significant differen-ce between groups I, II and III (p< 0.0001).
Conclusion:
: Patients with BMI > 25 Kg/m(2) had a worse functional evaluation through WOMAC scores when compared to patients with normal BMI after RTKA. Level of Evidence III, Tranversal Retrospective Study.
