Re-evaluating osteoporosis and fracture risk in Crohn's disease patients in the era of TNF-alpha inhibitors
Division of Gastroenterology, Department of Medicine; Division of Endocrinology and Metabolism, Department of Medicine
Digestive System Diseases | Gastroenterology | Musculoskeletal Diseases
INTRODUCTION: Patients with Crohn's disease (CD) are at increased risk for osteoporosis and fractures as compared to the general population. Recently, various cytokines including tumor necrosis factor (TNF)-alpha are found to play a major role in bone health. In this study, we aimed to gain a better understanding of the risk factors for osteoporosis and vitamin D deficiency in the era of TNF-alpha inhibitors.
METHODS: We conducted a retrospective review of 464 consecutive patients with CD in our GI clinic between 2008 and 2015. Statistical analysis was performed using the student t-test and chi-square test.
RESULTS: CD patients treated with TNF-alpha inhibitors (TNF) and those who are anti-TNF naïve (NB) had similar rates of vitamin D deficiency, insufficiency and normal vitamin D-25-OH levels. Similarly, rates of osteoporosis (16% vs 18%), osteopenia (53% vs 57%) and normal bone density (31% vs 25%) were comparable between the TNF and NB groups respectively. However, Z-scores at the spine (-0.47 vs -0.05) were significantly lower in the TNF group (p = .03). Interestingly, rates of osteoporosis in the NB group were drastically different before and after age 60 (3.6% vs 30%) with no major difference in the TNF group (15% vs 18%). Bone density was positively correlated with BMI (Pearson's R = 0.39) and negatively correlated with age and smoking status (R= -0.25).
CONCLUSIONS: TNF group patients were diagnosed with osteoporosis from an earlier age compared to NB group but with a smaller increase in osteoporosis after menopause. Further prospective studies are necessary to further determine the role of anti-TNF medications in osteoporosis.
Crohn’s disease, Osteoporosis, anti-TNF medications
DOI of Published Version
Scand J Gastroenterol. 2018 Feb;53(2):168-172. doi: 10.1080/00365521.2017.1416161. Epub 2017 Dec 13. Link to article on publisher's website
Scandinavian journal of gastroenterology
Hakimian S, Kheder J, Arum SM, Cave DR, Hyatt B.. (2018). Re-evaluating osteoporosis and fracture risk in Crohn's disease patients in the era of TNF-alpha inhibitors. University of Massachusetts Medical School Publications.
https://doi.org/10.1080/00365521.2017.1416161. Retrieved from https://escholarship.umassmed.edu/publications/17