نتایج جستجو برای: epidemiological studies
تعداد نتایج: 1469285 فیلتر نتایج به سال:
R epeated cross-sectional surveys have been largely used to assess temporal trends in the prevalence of diseases. To be reliable, these should respect the following simple, but essential, rules: 1) the same source population should be randomly sampled and studied on different occasions, using the same sampling frame; 2) similar numbers of subjects should be selected; 3) the disease should be di...
background: many studies have been published on the antioxidative effects of boric acid (ba) and sodium borates in in vitro studies. however, the boron (b) concentrations tested in these in vitro studies have not been selected by taking into account the realistic blood b concentrations in humans due to the lack of comprehensive epidemiological studies. the recently published epidemiological stu...
background and aims: since the epidemiological, clinical and experimental characteristics of meningitis are different for various locations, this study was conducted to investigate the characteristics of meningitis patients admitted to hospitals of yazd in the 2009 to 2013. materials and methods: in this cross-sectional and descriptive study, all 261 patients with meningitis were considered in ...
Premature ejaculation is likely the most common sexual dysfunction in men with a worldwide prevalence of approximately 30%. Epidemiological studies, accurate diagnosis, appropriate treatment and evaluation of clinical trials need a universally acknowledged definition that is also capable of operationalization. Studies have defined premature ejaculation differently. The most widely used definiti...
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