نتایج جستجو برای: case control study
تعداد نتایج: 5686763 فیلتر نتایج به سال:
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-...
abstract the aim of the present study is to explore the impact of the cognitive reading strategy instruction on learners reading self-efficacy and their reading achievement. in order to fulfill this purpose, from 120 participants, 90 intermediate efl learners as an experimental group were chosen from three different educational settings namely, yazd university, yazd science and art un...
the effect of learning strategies on the speaking ability of iranian students in the context of language institutes abstract language learning strategies are of the most important factors that help language learners to learn a foreign language and how they can deal with the four language skills specifically speaking skill effectively. acknowledging the great impact of learning strategies...
Background and aims: Experience transfer and the knowledge utilization of rapid and timely outbreakcontrol can be the key path-finding to health systems (HSs). The aim of this study was to investigate anEntamoeba histolytica diarrhea outbreak through timely control.Methods: A case-control study and an environmental survey were conducted to identify the sourceof infection...
the present study was conducted to investigate the role of summary in teaching grammar process on pre-university students. to this end, 48 male pre-university students in semnan were participants. they were math class that we called experimental group and science class as control group. in order to make sure there was no significant difference in proficiency level of two groups. a pre-test wa...
this study investigated the impact of explicit instruction of morphemic analysis and synthesis on the vocabulary development of the students. the participants were 90 junior high school students divided into two experimental groups and one control group. morphological awareness techniques (analysis/synthesis) and conventional techniques were used to teach vocabulary in the experimental groups a...
building on previous studies on the effectiveness of different types of written corrective feedback, the present study aimed at investigating whether direct focused corrective feedback and direct unfocused corrective feedback produced any differential effects on the accurate use of english articles by efl learners across two different proficiency levels (low and high). in current study, the par...
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