Risk Factors of Adjacent Segment Disease After Anterior Cervical Arthrodesis: A Retrospective Study of Sagittal Measurement of Thoracic Inlet Parameters

Background To explore the predictive parameters for adjacent segment disease (ASD) after anterior cervical arthrodesis at the sagittal measurement of thoracic inlet. Methods We included 212 subjects treated with anterior cervical fusion surgery to identify predictive parameters for ASD. We applied multivariate logistic regression to find the relevant parameters. Results Two hundred patients completed the final follow-up. The results of logistic regression analysis showed that T1 slope of less than 19.50 could be a predictive parameter of ASD after the anterior cervical arthrodesis (P Conclusions Sagittal balance of thoracic inlet is vital to avoid the. cervical degenerative disease, while T1 slope of less than 19.50 appears to be an independent risk factor for the ASD, keeping the T1 slope of more than 19.5 is reasonable.