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Low body mass not vitamin D receptor polymorphisms predict osteoporosis in patients with inflammatory bowel disease
Author(s) -
NOBLE C. L.,
MCCULLOUGH J.,
HO W.,
LEES C. W.,
NIMMO E.,
DRUMMOND H.,
BEAR S.,
HANNAN J.,
MILLAR C.,
RALSTON S. H.,
SATSANGI J.
Publication year - 2008
Publication title -
alimentary pharmacology and therapeutics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.308
H-Index - 177
eISSN - 1365-2036
pISSN - 0269-2813
DOI - 10.1111/j.1365-2036.2008.03599.x
Subject(s) - medicine , osteoporosis , osteopenia , ulcerative colitis , gastroenterology , inflammatory bowel disease , calcitriol receptor , vitamin d and neurology , univariate analysis , body mass index , disease , multivariate analysis , bone mineral
Summary Background  Osteoporosis is a recognized complication of inflammatory bowel disease (IBD). Aim  To investigate the role of environmental factors and vitamin D receptor (VDR) variants on the prevalence of osteoporosis. Methods  DEXA scans and case note review were performed on 440 IBD patients from 1997 to 2006. All the IBD patients and 240 healthy controls were genotyped for VDR variants Taq ‐1 and Apa ‐1 using PCR‐RFLP. Results  Osteoporosis and osteopenia rates were 15% and 18% for IBD, 16% and 18% for Crohn’s disease (CD) and 13% and 19% for ulcerative colitis, respectively. On univariate analysis of the CD patients, low body mass index (BMI, <18.5) and smoking status ( P  = 0.008 and 0.005 respectively) were associated with osteoporosis and osteopenia. Low BMI was also associated with osteoporosis on multivariate analysis in CD ( P  = 0.021, OR 5.83, CI 1.31–25.94). No difference was observed between Taq ‐1 and Apa ‐1 VDR polymorphisms in IBD, CD, ulcerative colitis and healthy controls. However, CD males were more likely to carry the variant Taq ‐1 polymorphism than healthy controls males ( P  = 0.0018, OR 1.94, CI 1.28–2.92) and female CD patients ( P  = 0.0061, OR 1.60, CI 1.17–2.44). Conclusions  In this well‐phenotyped cohort of IBD patients, a relatively low prevalence of osteoporosis was observed. Low BMI was the only independent risk factor identified to be associated with osteoporosis.

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