Higher body mass index was not associated with increased in-hospital complications following primary total knee arthroplasty, and obese class 2 patients had lower odds (OR 0.65; 95% CI 0.43-0.99).
Observational (n=1,665)
Does higher body mass index increase perioperative complications until hospital discharge in patients undergoing primary total knee arthroplasty?
Higher BMI is not associated with increased in-hospital complications following primary total knee arthroplasty, though it significantly increases operating time.
Odds Ratio: 0.65 (95% CI 0.43–0.99)
p-value: p=0.044
Purpose: To investigate the association between body mass index (BMI) and perioperative complications until hospital discharge, following primary total knee arthroplasty (TKA). Methods: This retrospective study reviewed 1665 cases of elective primary unilateral TKA performed between 2006 and 2010, from a prospective secure electronic database. Types of complications, length of operating time, and duration of hospital stay were analyzed in both adjusted (for known confounders) and unadjusted analyses. A further matched analysis was also performed. Results: In terms of overall complications, there was no statistically significant difference between the BMI categories. When individual obesity category was considered, obese 2 had the lowest odds of developing complications, both with unadjusted (odds ratio (OR): 0.61, 95% confidence interval (CI) 0.41–0.91, p < 0.015) and adjusted regression analysis (OR: 0.65, 95% CI: 0.43–0.99, p = 0.044). Compared to normal weight category, obese class 3 (≥40 kg/m 2 ) individuals were at 66% (OR: 0.34, 95% CI: 0.21–0.55) lower (unadjusted) odds of developing cardiac complications (overall p < 0.001). With the matched analysis, compared to normal weight category, obese class 3 (≥40 kg/m 2 ) individuals were at a 60% (OR: 0.40, 95% CI: 0.23–0.68) lower (unadjusted) odds of developing cardiac complications (overall p = 0.004). Obese 3 patients had significantly higher operating time compared with other groups ( p < 0.001). Conclusion: This study did not find a significant association between BMI and increased overall in-hospital medical or surgical complications following primary TKA. Obesity significantly increased the length of operating time.
Gurunathan et al. (Sat,) conducted a observational in Primary total knee arthroplasty (n=1,665). Body mass index vs. Normal weight category was evaluated on Perioperative complications until hospital discharge (OR 0.65, 95% CI 0.43-0.99, p=0.044). Higher body mass index was not associated with increased in-hospital complications following primary total knee arthroplasty, and obese class 2 patients had lower odds (OR 0.65; 95% CI 0.43-0.99).
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