Abstract
Objective: This study aimed to investigate the preoperative factors affecting the achievement of a patient acceptable symptom state (PASS) for all four Knee Injury and Osteoarthritis Outcome Score (KOOS) subscales one year after total knee arthroplasty (TKA).
Methods: 95 patients who underwent posterior stabilized TKA between October 2020 and February 2023. Patients were divided into two groups based on whether they achieved PASS for all four KOOS subscales (symptom, pain, activities of daily living and quality of life) one year postoperatively. Logistic regression analysis was conducted with significant variables between both groups as independent factors to identify preoperative factors influencing the achievement of PASS one year postoperatively.
Results: The proportion of patients who achieved PASS for all four subscales was 54%. Regression analysis identified preoperative knee flexion pain (p = 0.033) and the Pain Catastrophizing Scale (PCS) (p = 0.023) as factors influencing PASS achievement.
Conclusion: Improvements in preoperative knee flexion pain and PCS may enhance patient satisfaction, as measured using the KOOS.
