Showing 3 results for Keshavarz M
Babaee Gh, Amani F, Biglarian A, Keshavarz M,
Volume 65, Issue 7 (4 2007)
Abstract
Background: An outlier is an observation that lies an abnormal distance from other values in a random sample from a population. Outliers sometimes deal with to abnormality in obtained results from collected data and information. known outlier data by researchers, physicians and other persons that work in medical fields and sciences is important and they must control data before getting result about outlier data, effect of them in information bias and how to remove & control to obtain minimum bias and exact data .in this paper we had trying by known technique and tests to control them and minimized the errors related to them.
Methods: This paper has been done on 30 student's height in Tarbiat Modares University that measured by meter in smoothing area. We applied some methods such as Z-test, Grub test and graphical methods to determine outliers. In this paper the advantage and disadvantage of methods were evaluated and finally compares with each other.
Results: The above tests showed that the data values 153, 110 among collected data were outliers. All of the methods showed that the above data were outliers. Calculation quartiles and intermediate quartiles showed that the observations under 125 and upper 141 were mind outliers and if the observation under 119 and upper 147 is the sever outliers. According to upper situations the amounts of 110 and 153 is the sever outliers and resulted from all methods.
Conclusion: The results showed that all methods were useful in determine outlier data and between them Quartiles were important to known severe and mild outliers. Also Grub test with p-Value is very useful to report outliers.
Mansoori M, Parviz M, Keshavarz M, Soltani N, Gharibzadeh Sh,
Volume 65, Issue 13 (Vol 65, Supplement 1 2008)
Abstract
Background: Diabetes mellitus is a common metabolic disorder accompanied with
structural and functional changes in central and peripheral nervous system. Researches
showed, memory disturbance were occurred in the course of diabetes. On the other hand,
magnesium deficit has been described in diabetic patients. Some researches were showed
that, appropriate magnesium supplementation can play a positive role in diabetic control.
Methods: Locally produced male rats were used. Diabetes was induced with intravenous
injection of 40 mg/kg streptozotosin. In treatment groups, the animals were received
magnesium sulfate via drinking water (10 g/l). Eight weeks after diabetes confirmation,
the animals were assessed on Morris Water Maze.
Results: A significant decrease in time of platform finding (latency) and distance of
swimming in all four experimental days were seen in all groups. Mean latency in diabetic
group was significantly higher than the other. This weak response was almost completely
prevented by magnesium sulfate administration.
Conclusion: It seems that after eight weeks magnesium sulfate administration (10g/l),
spatial memory of the animals was improved in comparison to diabetic group that can
suggest role of magnesium in recovery of diabetic animal memory.
Babaee Gh, Keshavarz M, Parsinia M, Ashkvari P,
Volume 66, Issue 1 (30 2008)
Abstract
Background: This study have conducted in order to determine of direct or indirect effective factors on mortality of neonates with low birth weight by path analysis.
Methods: In this cohort study 445 paired mothers and their neonates were participated in Tehran city. The data were gathered through an answer sheet contain mother age, gestational age, apgar score, pregnancy induced hypertension (PIH) and birth weight. Sampling was convenience and neonates of women were included in this study who were referred to 15 government and private hospitals in Tehran city. Live being status of neonates was determined until 24 hours after delivery.
Results: The most changes in mortality rate is related to birth weight and its negative score means that increasing in weight leads to increase chance of live being. Second score is related to apgar sore and its negative score means that increasing in apgar score leads to decrease chance of neonate death. Third score is gestational age and its negative score means that increasing in weight leads to increase chance of live being. The less changes in mortality rate is due to hypertensive disorders in pregnancy.
Conclusion: The methodology has been used could be adopted in other investigations to distinguish and measuring effect of predictive factors on the risk of an outcome.
