The X-Ray Knee instability and Degenerative Score (X-KIDS) to determine the preference for a partial or a total knee arthroplasty (PKA/TKA)

Abstract

The X-ray Knee Instability and Degenerative Score (X-KIDS) was developed as a tool based on the degenerative and instability patterns seen on routine X-ray views of the weight-bearing compartments and tested on 336 knees, average age 64 years and followed up for 24 months. It is a study to evaluate the X-KIDS scoring method, which quantifies whether a PKA or TKA is the procedure of choice, comparing it to the surgical procedure done and to a stress X-ray evaluation as a stand-alone when contemplating knee arthroplasty. Points are allocated to the following features: narrowing (N), osteophytes (O), and subluxations (S). The assessed score is out of 10. A patient with a score of at least 3 but less than 5 is suitable for a PKA, a score of 5 could be suitable for a PKA or a TKA and a score exceeding 5 requires a TKA. There was a 95.82% (321) evaluator consensus with the X-KIDS on the X-ray sequence for a PKA or TKA. 92.3% (310) received the procedure assessed by X-KIDS and 2.98% (10) could have received the procedure evaluated. 90.78% of the stress views indicated the preferred procedure and is not as reliable as X-KIDS to determine the procedure.