Zohreh Hamidi

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BACKGROUND There are multiple studies in different countries regarding the prevalence of vitamin D deficiency. These studies showed high prevalence of vitamin D deficiency in Asian countries. This study tries to elucidate the prevalence of vitamin D deficiency and its influencing factors in population of Tehran. METHODS 1210 subjects 20-64 years old were(More)
OBJECTIVES In this study, we sought the proper cutoff level for quantitative ultrasonography (QUS) of the heel in identifying bone mineral density (BMD) categories as determined by dual-energy x-ray absorptiometry (DXA) in postmenopausal women. METHODS With the use of DXA, BMD categories of the lumbar spine and different areas of the left femur of 420(More)
According to the WHO criteria many renal transplant patients display osteopenia or osteoporosis. Dual-energy X-ray absorptiometry (DXA), the standard method to assess bone mineral density (BMD), is not always available. Quantitative ultrasound (QUS) of the phalanx is an inexpensive, mobile, and radiation-free diagnostic alternative. Few data address the(More)
BACKGROUND Osteoporosis has been frequently reported in patients with inflammatory bowel diseases, especially Crohn's disease. METHODS All consecutive Crohn's disease patients who attended the GI Clinics at Shariati Hospital, Tehran, Iran, from 2004 to 2007 were evaluated. A BMD-DEXA assessment was performed for all patients. Among those patients(More)
BACKGROUND Thalassemia major and its treatment by stem cell transplantation can have deleterious effects on bone integrity. This study assesses the adverse effects of transplantation on growing bones of pediatric thalassemic patients. METHODS Bone mineral density (BMD) of 20 patients from three thalassemia classes whose mean (SD) age was 7.4 (3.8) years(More)
AIM Quantitative ultrasound (QUS) of the phalanx is a non-invasive, inexpensive and portable method for bone assessment. We determined a cut off point for it in the diagnosis of osteoporosis. METHODS In 180 postmenopausal women, dual-energy X-ray absorptiometry (DEXA) of the spine and femur and QUS of the phalanx were performed. Then, the optimum cut-off(More)
UNLABELLED Low BMDs, short stature, hypogonadism, subclinical hypothyroidism, and IFG are found in 3.3, 10, 33, 16.6, 6.6, and 26.6 % of 30 pediatric β thalassemia major patients, respectively. Age is related with low Z-scores. Short stature and hypogonadism patients were older. These patients' monitoring in late childhood and early teenage for these(More)
Purpose: Chronological and longitudinal changes of bone density in patients with secondary osteoporosis, have been shown helpful in providing a model of calcium and bone metabolism. This model can be used in the understanding and management of bone disorders in primary osteoporosis. Objective: The aim of our study was to investigate bone density changes in(More)
In this work, silver nanoparticles were synthesized and stabilized with 11-mercaptoundecanoateanions to produce a new Ag@MUA core shell structure, and its utilizing for fabrication of a new sensing film. Gold nanoparticles (AuNPs) were electrochemically produced and simultaneously immobilized into the electropolymerized polypyrrole (PPy) film with the(More)