Optimal indicators for identification of compensatory sagittal balance in patients with degenerative disc disease

Abstract Study design A retrospective study. Background To determine whether radiological parameters such as maximal lumbar lordosis-maximal thoracic kyphosis (maxLL-maxTK), sacral slope-pelvic tilt(SS-PT) and slope/pelvic tilt (SS/PT) could be used indicators for the diagnosis of degenerative disc disease (DDD) in compensatory sagittal balanced patients. Methods Medical records DDD patients asymptomatic adults within our hospital registry from July 2019 to November were reviewed. General characteristics evaluated between two groups. Analysis covariance with age a covariate was conducted, followed by receiver operating characteristic (ROC) analysis areas under curve (AUC) calculation. The max Youden index calculated identify optimal sensitivity specificity pairs. Results total 42 199 included. For those that showed significant differences groups, AUC SS/PT SS-PT largest, reaching 0.919 0.936, respectively. 0.749, 0.952 0.701 when = 1.635 threshold. found threshold =8.500, which increased 0.854, while decreased 0.857. Conclusions Both significantly different adults. < 1.6 8.5 balance.