D Rebello1,2, D Anjelly3,4, D J Grand3,5, J T Machan6, M D Beland3,5, M S Furman3,5, J Shapiro3,7, N LeLeiko3,7, B E Sands8, M Mallette9, R Bright9, H Moniz9, M Merrick10, S A Shah3,11. 1. Alpert Medical School, Brown University, Providence, RI, USA. Dionne.rebello@lifespan.org. 2. Department of Internal Medicine, Rhode Island Hospital, 593 Eddy Street, Providence, RI, 02903, USA. Dionne.rebello@lifespan.org. 3. Alpert Medical School, Brown University, Providence, RI, USA. 4. Division of Gastroenterology, University of Massachusetts Memorial Medical Center, Worcester, MA, USA. 5. Department of Diagnostic Imaging, Rhode Island Hospital, 593 Eddy Street, Providence, RI, 02903, USA. 6. Department of Biostatistics and Research, Rhode Island Hospital, 593 Eddy Street, Providence, RI, 02903, USA. 7. Hasbro Children's Hospital, Providence, RI, USA. 8. The Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA. 9. Division of Gastroenterology, Rhode Island Hospital, Providence, RI, USA. 10. Crohn's & Colitis Foundation, New York, NY, USA. 11. The Miriam Hospital, Providence, RI, USA.
Abstract
Bone disease is prevalent among patients with inflammatory bowel disease (IBD), though bone density screening remains underutilized. We used CT scans performed for other indications in IBD patients to identify and monitor osteopenia using CT attenuation values at the lumbar spine. Significant rates of bone disease were detected which would have otherwise gone undiagnosed. INTRODUCTION: Osteoporosis affects about 14-42% of patients with IBD. Though screening is recommended in IBD patients with risk factors, it remains underutilized. In patients with newly diagnosed IBD, we used CT scans performed for other indications to identify and monitor progression of osteopenia. METHODS: Using the Ocean State Crohn's and Colitis Area Registry, we identified adult patients with one or more abdominal CT scans. Each patient had two age- and gender-matched controls. Radiologists measured attenuation through trabecular bone in the L1 vertebral body recorded in Hounsfield units (HU). Generalized estimating equations were used to measure how HU varied as a function of gender, type of IBD, and age. RESULTS: One hundred five IBD patients were included, and 72.4% were classified as "normal" bone mineral density (BMD) and 27.6% as potentially osteopenic: 8.6% with ulcerative colitis and 19.0% with Crohn's disease. We found a decrease in bone density over time (p < 0.001) and that BMD decreases more in Crohn's disease than in ulcerative colitis (p < 0.004). Sixty patients had two CT scans, and mean loss of 9.3 HU was noted. There was a non-significant decrease in BMD over time in patients exposed to > 31 days of steroids and BMD was stable with < 30 days of steroid exposure (p < 0.09). CONCLUSION: Using CT scans obtained for other indications, we found low rates of osteopenia and osteoporosis that may otherwise have gone undiagnosed. Refinement of opportunistic screening may have advantages in terms of cost-savings and earlier detection of bone loss.
Bone disease is prevalent among patients with inflammatory bowel disease (IBD), though bone density screening remains underutilized. We used CT scans performed for other indications in IBDpatients to identify and monitor osteopenia using CT attenuation values at the lumbar spine. Significant rates of bone disease were detected which would have otherwise gone undiagnosed. INTRODUCTION:Osteoporosis affects about 14-42% of patients with IBD. Though screening is recommended in IBDpatients with risk factors, it remains underutilized. In patients with newly diagnosed IBD, we used CT scans performed for other indications to identify and monitor progression of osteopenia. METHODS: Using the Ocean State Crohn's and Colitis Area Registry, we identified adult patients with one or more abdominal CT scans. Each patient had two age- and gender-matched controls. Radiologists measured attenuation through trabecular bone in the L1 vertebral body recorded in Hounsfield units (HU). Generalized estimating equations were used to measure how HU varied as a function of gender, type of IBD, and age. RESULTS: One hundred five IBDpatients were included, and 72.4% were classified as "normal" bone mineral density (BMD) and 27.6% as potentially osteopenic: 8.6% with ulcerative colitis and 19.0% with Crohn's disease. We found a decrease in bone density over time (p < 0.001) and that BMD decreases more in Crohn's disease than in ulcerative colitis (p < 0.004). Sixty patients had two CT scans, and mean loss of 9.3 HU was noted. There was a non-significant decrease in BMD over time in patients exposed to > 31 days of steroids and BMD was stable with < 30 days of steroid exposure (p < 0.09). CONCLUSION: Using CT scans obtained for other indications, we found low rates of osteopenia and osteoporosis that may otherwise have gone undiagnosed. Refinement of opportunistic screening may have advantages in terms of cost-savings and earlier detection of bone loss.
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