نتایج جستجو برای: petrosal sinus
تعداد نتایج: 42313 فیلتر نتایج به سال:
Direct drainage of the basal vein of Rosenthal into the superior petrosal sinus: a literature review
BACKGROUND Oral and dental health diseases can affect the general health of students. OBJECTIVES The aim of this study was to identify the predictors of oral and dental health behavior using the health belief model (HBM) in female students in Teheran, Iran. PATIENTS AND METHODS This was a cross-sectional study framed by the HBM, including 400 female students living in district 5 of Tehran, ...
BACKGROUND Smoking has been internationally recognized as an epidemic contributing to major health problems. Smoking contributes to most of the preventable deaths worldwide. Although Cyprus is considered among developed countries with high smoking prevalence (estimates of 25-35% of the population), not much has been done for the systematic scientific study of this problem, especially in adolesc...
Recent research in cognitive and language development suggests that infants and young children are capable of complex computations and statistical inference. The present studies investigated whether 4-year-old children can solve simple probabilistic reasoning problems. Two experiments investigated children’s ability to use information from a sample to make generalizations about a population and...
Systematic sampling is a commonly used technique due to its simplicity and ease of implementation. The drawback of this simplicity is that it is not possible to estimate the design variance without bias. There are several ways to circumvent this problem. One method is to suppose that the variable of interest has a random order in the population, so the sample variance of simple random sampling ...
Results from the third nationwide cluster sampling survey on the epidemiology of schistosomiasis in the People's Republic of China, conducted by the Ministry of Health in 2004, are presented. A stratified cluster random sampling technique was used, and 239 villages were selected in 7 provinces where Schistosoma japonicum remains endemic. A total of 250,987 residents 6-65 years of age were inclu...
BACKGROUND More than a billion people, mainly in low- and middle-income countries, are unable to access needed health-care services for a variety of reasons. Possible factors influencing health-care utilization include socio-demographic and economic factors such as age, sex, education, employment and income. However, different studies have showed mixed results. Moreover, there are limited studi...
Socioeconomic inequalities associated with multiple disabilities have not been explored in China. This is the first study to explore changes in multiple disabilities among persons aged 15-64 years in China. Data were derived from the 1987 and 2006 China National Sample Surveys on Disability, which are nationally representative population-based surveys. Both surveys used multistage, stratified, ...
When properly applied, stereology is a very robust and efficient method to quantify a variety of parameters from biological material. A common sampling strategy in stereology is systematic random sampling, which involves choosing a random sampling [corrected] start point outside the structure of interest, and sampling relevant objects at [corrected] sites that are placed at pre-determined, equi...
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