Changes in Coronal Plane Parameters Don't Affect Patient Reported Outcomes at First Year Postoperatively in Total Knee Arthroplasty Patients, A Retrospective Study.

Abstract

This study was planned to reveal the relationship between coronal alignment parameters and patient reported outcome (PROM) in the first year postoperatively after Total Knee Arthroplasty(TKA). TKA for knee osteoarthritis between February 2019 and March 2023 were identified as potential candidates for the study.Patients who underwent THA between February 2019 and March 2023 were retrospectively scanned.The exclusion criteria included ipsilateral total hip arthroplasty,history of surgery around the knee,preoperative tibial or femoral fracture,osteoarthritis due to rheumatic or traumatic causes,osteoarthritis due to valgus malalignment,bilateral THA and leg long-leg standing x-rays not taken with the appropriate acquisition technique.All patients were measured on full wight bearing long leg x-rays taken 1 day before preoperatively and 1 year postoperatively.Hip-Knee-Angle (HKA), Lateral distal femoral angle(LDFA) and medial proximal tibial angle(MPTA) were measured in all patients.Preoperative and 1 year measurements of the patients.The relationship between changes in radiographic measurements and Knee Injury and Osteoarthritis Outcome Score (KOOS),Visual Analogue Score (VAS) and Oxford Knee Score was statistically evaluated. 153 patients were included in the study.137(89.5%) of these patients were female and 16(10.5%) were male.The mean age of the patients was 66.7±5.12 years.Statistically significant improvement was found in all clinical scores in the post- operative period.A statistically significant negative correlation was found between pre-operative HKA and pre-operative Oxford score.The analysis of the relationship between changes in radiologic parameters and changes in clinical scores revealed no statistically significant correlation. There is no relationship between coronal plane parameters and postoperative 1st year PROM in TKA patients.