نتایج جستجو برای: control studies
تعداد نتایج: 2580223 فیلتر نتایج به سال:
Administered commodity price schemes in developing countries have proved ineffective in raising farmers’ incomes and price stabilisation through futures markets is increasingly advocated as the alternative policy objective. A potential difficulty is that farmers tend not to hedge extensively, even in developed countries where access to futures markets is long established. Explanations for this ...
This article examines the association between risky sexual behavior and HIV risk perception among miners. A cross-sectional survey (n = 293) was conducted with miners who worked in South African mines and lived in the Chokwe district of Gaza Province in southern Mozambique. The study used ordinary logistic and cumulative logistic models to understand what drives miners to HIV susceptibility. Th...
INTRODUCTION Breast cancer is the most common cancer in morocco women were it occupies the first place in term of incidence and mortality. The aim of the present paper is to evaluate the risk factors associated with a breast cancer in a population of Moroccan women. METHODS A case-control study was conducted with population women whose age is less than 40 years during 2008-2010 at the Nationa...
OBJECTIVE To investigate the perceptions about causes and prevention of childhood obesity held by the adult public in Calgary, Canada. DESIGN Using a cross-sectional survey design, adults were recruited from a shopping mall located in a region of Calgary, Alberta characterized by mixed ethnic and socio-economic residents. SUBJECTS 264 adults in Calgary, Canada. MEASUREMENTS Participants c...
BACKGROUND & OBJECTIVES There has been more than 100 per cent increase in incidence of stroke in low- and middle-income countries including India from 1970-1979 to 2000-2008. Lack of reliable reporting mechanisms, heterogeneity in methodology, study population, and small sample size in existing epidemiological studies, make an accurate estimation of stroke burden in India challenging. We conduc...
PURPOSE To determine the prevalence and associated family factors of suicide attempts among junior and/or senior high school students, so as to provide bases for preventive measures of suicide in China. METHODS A total of 13,512 students from 32 junior and/or senior high schools in grades 7 to 11 in eight cities of China participated in a self-administered anonymous survey to report their fre...
BACKGROUND The persistent high prevalence of human scabies, especially in low- and middle-income countries prompted us to research the sociodemographic profile of patients suffering from it, and its spreading factors in Cameroon, a resource-poor setting. METHODS We conducted a cross-sectional survey from October 2011 to September 2012 in three hospitals located in Yaoundé, Cameroon, and enrol...
INTRODUCTION There are currently an estimated 10-12 million cases of leprosy in the world. In Sene District of the Brong Ahafo Region of Ghana the prevalence of leprosy is 2.4/10,000 of the population. Most of these cases are children, indicating that new infections are still occurring in the communities. OBJECTIVES To identify factors associated with leprosy in the Sene District in order to ...
Although mixed-severity fires are among the most widespread disturbances influencing western North American forests, they remain the least understood. A major question is the degree to which mixed-severity fire regimes are simply an ecological intermediate between lowand high-severity fire regimes, versus a unique disturbance regime with distinct properties. The Klamath-Siskiyou Mountains of so...
BACKGROUND The aim of the study was to focus the awareness of complications of oral piercing among a group of adolescents and young Italian adults with intraoral piercings. MATERIAL AND METHODS A total of 225 teenagers were asked to complete a questionnaire on the awareness of complications of oral piercing. An additional questionnaire was administered in case of oral piercing worn, based on ...
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