No correlation between diffuse idiopathic skeletal hyperostosis and coronary artery disease on computed tomography using two different scoring systems

Background: An association between diffuse idiopathic skeletal hyperostosis (DISH) and a history of coronary artery disease (CAD) was previously reported. Purpose: To investigate the association between DISH and CAD as assessed using the coronary artery calcification score (CACS) and the CAD-Reporting and Data System (CAD-RADS) score in patients with symptomatic chest pain. Material and Methods: Consecutive cardiac CT scans performed before and after IV contrast administration were evaluated for CACS (Agatston method), CAD-RADS, and the presence of DISH. The association of DISH with the presence and extent of CACS/CAD-RADS scores was analyzed with and without adjustment for known atherosclerotic risk factors. Results: The study cohort included 268 individuals (157 men, 111 women; median age = 54 years). DISH was present in 65 (24.3%) individuals. CACS was significantly higher in the DISH group compared to the non-DISH group in the univariate analysis (median CACS DISH = 2, range = 0–80.5 vs. median CACS non-DISH = 0, range = 0–11; P < 0.005) but this association did not persist on multivariate analysis. There was a positive trend toward higher CAD-RADS scores in the DISH group (P = 0.03) but after adjustment for age, male sex, and family history, this tendency was not significant. Conclusion: No independent association was found between the presence of DISH and CACS and CAD-RADS scores. Our findings suggest a more complex and possibly non-causal relationship between coronary artery disease and DISH.