Functional Outcomes After Total Knee Arthroplasty: Comparing Knee Society and Osteoarthritis Outcome Scores

Abstract

Background: Total knee arthroplasty (TKA) is a regularly performed procedure intended to improve function and relieve discomfort. To assess which Functional outcome tool is better, this study has been used to compare the Knee Society Score (KSS) with the Knee Injury and Osteoarthritis Outcome Score (KOOS) before and after performing a total knee arthroplasty (TKA). Method: This was a prospective Observational study conducted from 2018 to 2021. All patients who underwent primary TKA at Dr. Ziauddin Hospital, Clifton Campus, Karachi, were evaluated preoperatively and then 6 and 12 months postoperatively. Paired t-tests were used to compare the KSS and KOOS scores preoperatively and 6 months and 12 months postoperatively. A P-value of >0.05 was considered significant. Results: There was no significant variation in the statistics between the improvement of the two scores. KOOS focuses more on incorporating patient-reported objectives like life quality and everyday activities, while KSS emphasises objective aspects more, including range of motion, alignment, and stability. At 6-month comparison, showed a substantial difference, tilting towards KSS (p=0.002) in all collected measures, except for life quality. However, the changes were not as visible when compared to 12 months. 89% of the individuals responded satisfactorily one year following TKA, expressing their delight with the outcomes of the surgery. Conclusion: KSS and KOOS have both proven useful tools for computing functional outcomes after TKA. The results show the liveliness of taking the patient-reported outcomes into account and its objectiveness in demonstrating how effective TKA is.

Keywords

• Patient Outcome Assessment
• Quality of Life
• Osteoarthritis
• Arthroplasty
• Knee Joint