Showing 2 results for DJafarian
Nima Baziar, Kurosh Djafarian, Zhaleh Shadman, Mostafa Qorbani, Mohsen Khoshniat Nikoo, Farideh Razi,
Volume 13, Issue 5 (7-2014)
Abstract
Background: Vitamin D deficiency is associated with impaired insulin secretion, glucose intolerance and type 2 diabetes. This study was conducted to investigate the effects of supplementation with 50,000 IU vitamin D on improving serum vitamin D levels and insulin resistance in vitamin D insufficient or deficient type 2 diabetic patients.
Methods: In this double blind randomized clinical trial, 81 type 2 diabetic patients with vitamin D levels between 10-30 ng/ml were randomly assigned to intervention (50,000 IU vitamin D3 once a week) and control (placebo once a week) groups according to gender. The study duration was 8 weeks. At the beginning and the end of study, blood samples were collected after 12 hours overnight fasting and fasting serum glucose, insulin and 25-hydroxyvitamin D were measured. Insulin resistance was obtained by HOMA-IR calculation.
Results: After 8 weeks supplementation with vitamin D, 25-hydroxyvitamin D level was significantly increased and reached to normal levels in the intervention group. Fasting serum glucose and insulin concentrations and HOMA-IR were significantly decreased in the vitamin D group, but there were no significant changes in the placebo group.
Conclusion: Supplementation with 50,000 IU vitamin D for 8 weeks compared to placebo can improve inadequate levels of vitamin D and glycemic indicators in vitamin D insufficient or deficient type 2 diabetic patients.
Maryam Djamnezhad , Kurosh Djafarian, Mostafa Qorbani, Asal Ataie-Jafari, Saeed Hosseini,
Volume 14, Issue 1 (1-2015)
Abstract
Background: There is increasing interest about the relationship between metabolism, obesity and function of thyroid hormones in recent decades. This study aimed to determine the validity of a “thyroid and metabolism questionnaire” and its relationship with metabolism status and function of thyroid hormones.
Methods: It was a descriptive cross-sectional study on 164 people aged 20-64 years who were selected randomly from nutrition clinic. “Thyroid and Metabolism questionnaire” including 25 questions were completed for everyone. Biochemical parameters including serum level of T3, T4 and TSH were measured. Resting energy expenditure [REE] was measured by indirect calorimeter.
Results: The mean measured REE and calculated with Harris-Benedict formula were 1826.7 ± 475.34 and 2277.6 ± 454.54 kcal in men and 1410.8 ± 205.5 and 1670.73 ± 136.10 kcal in women respectively. The final score of this questionnaire had no significant association with measured REE. REE showed indirect relationship with serum level of T3, T4, T3/T4 and inverse relationship with TSH. Metabolism status of every participant was obtained via measuring and calculating REE with set and formula. The metabolism status of participants showed no agreements with metabolism status that predicted from “Thyroid and Metabolism” questionnaire. There was no significant association between metabolism status that was measured by indirect calorimeter and calculated from “Thyroid and Metabolism” questionnaire. From 25 questions of this questionnaire, only questions number 1, 4, 16 and 23 showed significant association with measured REE [P< 0.05].
Conclusion: Results of this study showed that “Thyroid and Metabolism” questionnaire had internal consistency, but not validity.
