نتایج جستجو برای: case control studies

تعداد نتایج: 3684408  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان 1388

abstract recent studies suggest that prelistening activities play an important role in the development of listening comprehension (e.g. long 1990;chiang and dunkel 1992; schmidt-rinehart 1994; jensen and hansen 1995; robinson et al., 1995; buck, 1995; foster and skehan,1996; teng 1996; robinson, 2001; chang and read 2006). in line with previous studies and to shed light on a new aspect of sche...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید مدنی آذربایجان - دانشکده زبانهای خارجی 1391

since esp received universal attention to smooth the path for academic studies and productions, a great deal of research and studies have been directed towards this area. swales’ (1990) model of ra introduction move analysis has served a pioneering role of guiding many relevant studies and has proven to be productive in terms of helpful guidelines that are the outcome of voluminous productions ...

Journal: :hepatitis monthly 0
ali kabir nikan health researchers institute, tehran, ir iran; department of epidemiology; faculty of public health; shahid beheshti university of medical sciences, tehran, ir iran. tel: +98-2144468645, fax: +98-2144476796

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیخ بهایی - دانشکده زبانهای خارجی 1392

critical thinking ability has an important role in education. accordingly, scholars around the world are searching for new ways for teaching and improving students critical thinking ability. in line with the studies in efl contexts supporting the positive relationship between critical thinking and writing performances, this study investigated the differential effects of halverson’s critical thi...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی تهران 0

به منظور کارآیی داروی کلونیدین در درمان کودکان بیش فعال 6-17 ساله، تعداد 20 نفر از کودکانی که به درمانگاه اطفال بیمارستان روز به مراجعه کردند و تشخیص adhd برای آنها گذاشته شده بود، بطور random انتخاب شدند این 20 کودک بطور random به دو گروه 10 نفر تقسیم شدند در گروه case کودکان بیمار هفته اول متیل فندیت گرفتند و 3 هفته بعد نتیل فنیدیت و کلونیدین دریافت کردند و گروه control هفته فندیت گرفتند و 3 ...

Journal: :Journal of Physiotherapy 2017

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده ادبیات و علوم انسانی 1386

the purpose of the present study is to find out whether bilinguals of khuzestan-arab origin or monolinguals of iranian origin code-switch during learning or speaking english and which group is more susceptible to code-switch. to this end, the students of 24 classes from high schools and pre- university centers were screened out, and interviewed and their voices and code-switchings were recorded...

Background Endometriosis is defined as overgrowth of endometrial tissue outside the uterine cavity. Diet may play a role in the aetiology of endometriosis through effects on oxidative stress, prostaglandin metabolism, and steroid hormone levels. The objective of this paper is to assess the role of diet on risk of endometriosis among infertile Iranian women. MaterialsAndMethods In this case cont...

2016
Tianjie HAN Junshan LI Ling WANG Hongzhi XU

BACKGROUND Coffee is implicated in the susceptibility to several cancers. However, the association between coffee and lymphoma remains unclear. This meta-analysis aimed to assess quantitatively the association between coffee and the incidence of lymphoma. METHODS A literature search was performed for cohort and case-control studies published using PubMed, Cochrane, and EMBASE databases. Studi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1390

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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