ACL reconstruction revision risk calculators

Here are two calculators which predict the risk of graft rupture following ACL reconstruction.

Norwegian Ligament Registry

Reports risk of graft rupture at 1, 2 and 5 years. Requires 5 inputs: age, KOOS QOL score, time to reconstruction, graft and fixation. The model was developed using a machined learning tool analyzing a data set of 24,935 patients (1).

MOON Risk Calculator

The Multicentre Orthopaedic Outcomes Network (MOON) developed a risk calculator by assessing the outcomes of n=839 14-22 year olds who underwent a primary ACL reconstruction with a normal contralateral knee. It is only valid for 14-22 year olds. There are options to calculate the risk of ACL reconstruction re-tear or contralateral ACL injury (2).

References:

1. Spindler KP, Huston LJ, Zajichek A, et al (2020) Anterior Cruciate Ligament Reconstruction in High School and College-Aged Athletes: Does Autograft Choice Influence Anterior Cruciate Ligament Revision Rates? Am J Sports Med 48:298–309
2. Martin RK, Wastvedt S, Pareek A, Persson A, Visnes H, Fenstad AM, Moatshe G, Wolfson J and Engebretsen L. Predicting Anterior Cruciate Ligament Reconstruction Revision: A Machine Learning Analysis Utilizing the Norwegian Knee Ligament Register. J Bone Joint Surg Am . 2022 Jan 19;104(2):145-153. doi: 10.2106/JBJS.21.00113.