We observed a high prevalence of physiologically significant hypovitaminosis D among pregnant women and their newborns, the magnitude of which warrants public health intervention.

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The prevalence of low vitamin D level in the studied healthy children was high and it is correlated with some components of metabolic syndrome. Outdoor activity for optimum sun exposure and additional studies are needed to evaluate the underlying metabolic syndrome components and hypovitaminosis D complications.

Posters 544variables derived from simple anthropometry: 1) Body Mass Index (BMI), 2) skinfolds (SF) and 3) Waist-to-Height ratio (WHtR) in young children. Methods:Body composition of twenty-five healthy, non-obese children, aged 4 to 7 years, was measured by the use of BMI, SF, WHtR and the 3C model. Fat mass (FM; kilograms) was derived from SF equations (Goran and Slaughter) and the 3C model, which consists of measurements of weight, body volume by air displacement plethysmography (BOD POD) and total body water by Deuterium water dilution (D2O). BMI and WHtR were derived from anthropometry. Conclusions: Using 3C model derived FM as reference, the results indicate that WHtR has limited utility in estimating body composition, whereas BMI and SF seem to be more useful in estimating body composition in young children. 1097 Conclusion:Adjustment of BMD to account for short stature using BMAD significantly altered results in our homogenous group of children born sga. The majority of children moved to within the normal range. DEXA scans are usually performed on children with chronic disease at increased risk of low BMD and osteoporotic fractures. These children are often small for their age hence a low bone density may simply reflect small body size. This has implications for diagnosis and treatment of osteoporosis. EVALUATION OF LIPID PROFILE IN CORD BLOOD OF TERM NEWBORNS IN OUR CENTER

Background: Based on previous studies, vitamin D deficiency could lead to nerve stimulation. The purpose of the present study was to determine frequency and duration of seizures in children with idiopathic epilepsy in two groups; normal level of vitamin D versus decreased level of vitamin D. Methods: This pilot, comparative study was carried out in Zanjan University of Medical Sciences on total 40 children aging between 2 to 12 years old (23 male and 17 female) with the diagnosis of idiopathic epilepsy. All patients were receiving anti-epileptic drugs. The initial questionnaire was completed by each parent. Total 40 epileptic cases were examined in close follow-ups every three months, during total 9 months. Meanwhile, the frequency and duration of each seizure were recorded in questionnaire at every three-month period. Vitamin D blood samples were analyzed at the beginning of the study and after 9 months following the study. Serum levels of Vitamin D were analyzed by ELISA method (Elecsys2010, RocheCo, Germany; STAR FAX; 2100), simultaneously, Vitamin D level <30 ng/ml (nanogram per milliliter) was defined as Vitamin D deficiency. Cases were divided into two groups based on Vitamin D level. The frequency and duration of convulsions were compared in patients with normal level of vitamin D versus children with decreased level of vitamin D. Data were analyzed by Chi-square and t-test methods. Results: In all 40 patients, vitamin D level less than 30 ng/ml was detected in 32% (13 patients) at the beginning of study and 35% (14 patients) in 9 months later (13 patients were common between the two groups). There was no significant relationship between the frequency of seizures, the duration of seizures and vitamin D levels in patients. The relationship between positive family history of epilepsy and the number of seizures was reported significant. The frequency of vitamin D deficiency was higher in female cases in final evaluation. Conclusion: In the present study, a considerable correlation was detected between the frequency of seizures and positive history of seizure in the family. The frequency of vitamin D deficiency was higher in female cases in final analysis. No significant relationship was detected between the number of seizures, the mean duration of seizures and serum level of Vitamin D in children who received anticonvulsant drugs. However, vitamin D deficiency in patients was not overlooked in order to prevent known complications. We recommend a randomized clinical trial in the future with an adequate sample size. Moreover, a non-epileptic control group in study would be useful.

Background: Few studies have been performed to investigate the association between vitamin D and respiratory problems in premature neonates. Methods: In this cohort study, a low serum level of vitamin D was considered as exposure and respiratory problems and associated interventions were considered as outcome. All patients were followed during their hospital stay. All preterm neonates admitted to the neonatal intensive care unit of a general hospital in Iran during one-year period from January 2018 were enrolled in this study. Serum vitamin D level was measured in the first 24 hours of life by liquid chromatography-spectrometry. Then, respiratory complications were compared between neonates with and without vitamin D insufficiency. Results: Among the 113 preterm newborns, 65 (58%) had a low and 48 (42%) had a normal level of vitamin D who were classified into two groups I and II, respectively. Respiratory distress syndrome (RDS) and requirement for surfactant administration was found in 40 cases (61.5%) in group I and in 20 cases (41.7%) in group II (P=0.036). Also, 46 newborns (70.8%) in the first group and 22 (45.8%) in the second group needed non-invasive ventilation (NIV) (P=0.007). Multiple logistic regression showed a significant association between vitamin D status and RDS (OR, 95% CI=2.840 (1.083–7.447), P=0.034), need for surfactant (OR, 95% CI=2.840 (1.083–7.447), P=0.034) and need for NIV (OR, 95% CI=3.929 (1.526–10.113), P=0.005). Conclusion: The incidence of RDS, need for surfactants, and need for NIV in newborns with vitamin D insufficiency were higher than the neonates with normal levels.

Reverse nearest neighbors query as an indispensable part of spatial retrieve plays an important role in spatial analysis and spatial processing. In this paper, we target the problem of reverse nearest neighbors query for moving objects. We devised a spatio-temporal index suitable for this problem firstly and then an algorithm for reverse nearest neighbors search is proposed based on this index. The results of experimental evaluation demonstrate that this algorithm outperforms others for reverse nearest neighbors queries of moving objects. This work can better improve and enhance the power of quantitative analysis and process for spatio-temporal database.