INTRODUCTION: The purpose of this study is to evaluate the prevalence of DISH in the patients with spinal disorders determined by roentgen images of the whole spine
METHODS: 345 patients who underwent surgical procedure in our hospital were recruited consecutively (March 2008 ‐ December 2009). Standing roentgen images of the whole spine were routinely performed. Patients with age below 18 years, congenital spinal disease, metastatic spinal tumor and inflamed spinal disease were excluded. 281 patients were accessed for eligibility. Assessment for the presence of DISH was using modified Resnick's criteria. In this study we investigated the prevalence, location, and the numbers of spinal DISH. The association between DISH and the patients' demographic dates was also investigated.
RESULTS: DISH was present in 25.6% (72/281). The average numbers of bridged vertebral bodies were 8.5. More than 80% of DISH was located from T7 to T11 and more than 95% of DISH was located at the level of T9/10. The prevalence of DISH for the 41‐49, 50‐59, 60‐69, 70‐79, and the over 80 year age group were 8.3% (2/24), 9.8% (5/51), 16% (12/75), 49.5% (48/97), 33.3% (4/12) respectively. The prevalence of DISH increased with age. The patients with DISH were significantly older (71.1 vs 60.9, p<0.05) and men were more likely to have DISH than women (p<0.05). Body weight and BMI is significantly higher in the patients with DISH compared to the patients without DISH (p<0.05). The incidence of hyper tension was significantly higher in the patients with DISH than the patient without DISH (p<0.05), but the incidence of diabetes mellitus was not significantly higher.
CONCLUSION: In the patients with DISH, spinal DISH was found most frequently in the lower level of thoracic spine and its prevalence was increases with age.