نتایج جستجو برای: control study
تعداد نتایج: 4825609 فیلتر نتایج به سال:
background: hamadan province is one of the high-risk regions in iran for multiple sclerosis (ms). a majority of the epidemiological studies conducted in iran addressing ms are descriptive. this study was conducted to assess ms and its associated risk factors in hamadan province, the west of iran . methods: this case-control study compared 100 patients with ms (case group) and 100 patients with ...
the ability to speak two languages in the world is a remarkable achievement. there is a good reason to believe that bilingualism is the norm for the majority of people in the world because 70% of the earth’s population are supposed to be bilingual or multilingual. various investigations have shown that the native language impacts foreign word recognition, and this influence is adapted by the de...
background : myocardial infarction in young age is increasing. identifying risk factors could be important for health promotion. we studied classic atherosclerotic risk factors in premature myocardial infarction. methods : in this matched case-control study, which was conducted from 2005 to 2007 in birjand county, the east of iran, atherosclerotic risk factors ( hypertension , family history of...
background: due to complex causal framework of neonatal mortality, improvement of this health indicator is quite gradual and it's decreasing trend is not as great as other health indicators such as infant and under 5 mortality rates.this study was conducted to evaluate neonatal mortality risk factors based on nested case-control design. methods: the study population was 6900 neonates who were ...
psoriasis is a chronic relapsing disorder that involves the skin, nails and joints. with regard to the role of the immune system in psoriasis, the current study compared serum ige concentration in patients with psoriasis with control group. current case-control study was conducted in dermatology clinic of razi hospital, tehran university of medical sciences, tehran, iran in 2012. fifty-eight pa...
objective: although numerous studies have found higher rates of abortion and still births following consanguinity (familial marriages), the question of whether consanguinity significantly increases the risk of neonatal death has inadequately been addressed.this study aims to evaluate familial marriage effects on neonatal death in rural areas in iran. materials and methods: i n this nested case-...
in fact, this study focused on the following questions: 1. is there any difference between the effect of functional/notional approach and the structural approaches to language teaching on the proficiency test of efl learners? 2. can a rather innovative language test referred to as "functional test" ge devised so so to measure the proficiency test of efl learners, and thus be as much reliable an...
the control of the configuration of the nise nanostructural thin films with temperature
Role-Based Access Control models are currently considered as the most effective approach for engineering access control systems. In this paper we experiment their application in the context of Multi-Agent Systems (MAS), by discussing the design of an access control system with an agent-oriented methodology such as SODA. In particular, we show how a clear separation between mechanisms and polici...
abstract background: multiple sclerosis (ms) is a complex inflammatory disease of the central nervous system. despite extensive research, its exact cause is unknown. one of the roles of nurses is discovery and prevention of factors related to the disease. this study aimed to investigate several food items concerning the etiology of ms in a population of ahvaz (iran). materials and methods: this...
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