Journal
JOURNAL OF CLINICAL ENDOCRINOLOGY & METABOLISM
Volume 102, Issue 1, Pages 251-258Publisher
ENDOCRINE SOC
DOI: 10.1210/jc.2016-3292
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Context: Bone mineral density (BMD) is increased in idiopathic hypoparathyroidism (IH). Parathyroid hormone (PTH) deficiency, hypocalcemic seizures, and anticonvulsants could compromise skeletal health in IH. Objective: We assessed vertebral fractures (VFs) and related factors in IH and change in BMD during follow-up. Design: VFs were assessed by morphometry. BMD was assessed by dual-energy X-ray absorptiometery at the lumbar spine, hip, and forearm. Change in BMD was assessed in a subset after a 10-year follow-up. Setting: The endocrine clinic of All India Institute of Medical Sciences, New Delhi, India. Subjects: Included were 104 patients with IH and 64 healthy controls. Hypocalcemia, hyperphosphatemia, normal kidney function, and low serum PTH levels were used to diagnose IH. Results: VFs were seen in 18.3% of patients with IH and 4.7% of controls (odds ratio, 4.54; 95% confidence interval, 1.28 to 16.04). Use of anticonvulsants and menopausewere significantly associated (P < 0.05) with VF. Mean BMD at lumbar spine and hipwere higher by 21.4% and 8.6%, respectively, in IH than in controls (P < 0.001), respectively. BMD significantly increased during follow-up at all sites. Change in BMDcorrelatedwithmaintenance of the serum calcium/ phosphorus ratio during follow-up. Conclusions: Despite increased BMD, prevalence of vertebral-fractures is greater in patients with IH, especially in postmenopausal women and those on anticonvulsant therapy.
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