Spondylolisthesis narrows down to the forward movement of a lumbar vertebra over the vertebra immediately below it. In this article, let us see the diagnosis grading of lar spondylolisthesis. To those wondering how is the grading of spondylolisthesis performed, it is worthy to note that there are three common grading systems utilized by practitioners across the globe. These three systems are the essential criteria, the orthopaedic risk assessment, and the Smith-Petersen classification. Three degrees of slippage are assigned in each system and the grading of spondylolisthesis is marked as 1, 2, 3 (not the degree of slippage) respectively to these systems mentioned above. .