Background: Obesity is associated with increased perioperative complications, risk of infection and need for early revision after total knee arthroplasty (TKA). There is conflicting evidence regarding the risk factors for weight change after TKA or its influence on outcomes.
Objectives: The paucity of literature on change in BMI in patients after simultaneous bilateral total knee arthroplasty (SB-TKA) prompted this study to evaluate: 1) the prevalence of patients who lost or gained weight; 2) if postoperative change in BMI influences functional outcome; 3) the predictive factors associated with weight change after surgery.
Study Design & Methods: We reviewed prospectively collected registry data of all 560 patients (1120 knees) undergoing …show more content…
Mean age at the time of surgery was 64.9 years. Overall, the mean preoperative BMI was 27.6 kg/m2. Following SB-TKA, 70 (13%) patients lost weight (LW), 332 (59%) patients maintained their weight (MW) and 158 (28%) patients gained weight (GW) at 2 years. There was no significant difference in age and gender between the three groups for (p > 0.05). Patients who gained or maintained weight after SB-TKA experienced a significantly greater improvement in KSKS (p = 0.024) and showed a trend towards a greater improvement in PCS (p = 0.073) compared to patients who lost weight (Table 1). Gender was not associated with a clinically significant change in BMI. Patients with increasing age were less likely to gain weight after SB-TKA (OR 0.967, 95% CI 0.946-0.989, p = 0.003), while patients with higher preoperative BMI were more likely to lose weight after TKA (OR 1.049, 95% CI 1.001-1.099, p = 0.046). Patients with better preoperative PCS or MCS were less likely to gain weight after SB-TKA (OR 0.980, 95% CI 0.962-0.998, p = 0.033 and OR 0.979, 95% CI 0.964-0.995, p = 0.009 respectively), while patients with better preoperative knee scores were more likely to lose weight after SB-TKA (OR 1.021, 95% CI
Objectives: The paucity of literature on change in BMI in patients after simultaneous bilateral total knee arthroplasty (SB-TKA) prompted this study to evaluate: 1) the prevalence of patients who lost or gained weight; 2) if postoperative change in BMI influences functional outcome; 3) the predictive factors associated with weight change after surgery.
Study Design & Methods: We reviewed prospectively collected registry data of all 560 patients (1120 knees) undergoing …show more content…
Mean age at the time of surgery was 64.9 years. Overall, the mean preoperative BMI was 27.6 kg/m2. Following SB-TKA, 70 (13%) patients lost weight (LW), 332 (59%) patients maintained their weight (MW) and 158 (28%) patients gained weight (GW) at 2 years. There was no significant difference in age and gender between the three groups for (p > 0.05). Patients who gained or maintained weight after SB-TKA experienced a significantly greater improvement in KSKS (p = 0.024) and showed a trend towards a greater improvement in PCS (p = 0.073) compared to patients who lost weight (Table 1). Gender was not associated with a clinically significant change in BMI. Patients with increasing age were less likely to gain weight after SB-TKA (OR 0.967, 95% CI 0.946-0.989, p = 0.003), while patients with higher preoperative BMI were more likely to lose weight after TKA (OR 1.049, 95% CI 1.001-1.099, p = 0.046). Patients with better preoperative PCS or MCS were less likely to gain weight after SB-TKA (OR 0.980, 95% CI 0.962-0.998, p = 0.033 and OR 0.979, 95% CI 0.964-0.995, p = 0.009 respectively), while patients with better preoperative knee scores were more likely to lose weight after SB-TKA (OR 1.021, 95% CI