Introduction:Obesity is considered one of the risk factors of developing knee osteoarthritis(OA). It may influence patient reported outcomes regarding functional score after total knee arthroplasty(TKA) also; cases are at more risk of developing complications like infection and deep venous thrombosis(D.V.T).
Aim of the study:This study was held to compare between obese and non-obese cases undergoing TKA regarding functional outcome.
Subjects and Methods: This is a prospective case series study in which 30 cases were distributed between two equal groups according to their body mass index(BMI). Non obese group are of BMI ≤ 30 Kg/m2 while obese group are of BMI < 30 Kg/m2. Cases were done in Fayoum university hospitals between September 2020 and July 2022. Functional scores were assessed using the Western Ontario and McMasters Universities Osteoarthritis Index(WOMAC) score before and after surgery by 9 months.
Results:The mean BMI in the non-obese group was 28.46 ±SD 1.54 while the mean BMI in the obese group was 36.97 ±SD 5.29. The mean postoperative WOMAC score in the non-obese group (14.6 ±SD 9.46) was less than that of the obese group (20.47 ±SD 8), there was no statistical significance (P value=0.077).Correlation between both groups regarding the change in WOMAC score from before to after surgery does not show statistical significance (P value=0.704).
Conclusion:Although the mean WOMAC score in the non-obese group is less than that of the obese group, correlation does not show statistical significance. Obesity does not influence functional outcome after surgery in the short term follow up after surgery.