نتایج جستجو برای: matched case control studies
تعداد نتایج: 3744722 فیلتر نتایج به سال:
Case-control studies investigate associations between exposures to risk factors and a condition of interest. Subjects with the condition (cases) are compared to subjects known not to have the condition (controls) with respect to the presence of risk factors in the past. This design is particularly useful when the condition of interest is relatively uncommon. Case-control studies are useful for ...
Background: Several epidemiologic studies indicate that some paternal occupations are associated with an increased risk of birth defects in offspring. Possible associations between paternal exposures and cardiovascular malformations were evaluated in previous studies. Material and methods: The case-control study was performed during an academic year between October 1999 and 2000. All children ...
Introduction & Objective: Age-related macular degeneration (AMD) is a disease affecting the central regions of the retina and choroid, which can lead to loss of central vision. Etiological research suggests that AMD is a complex disease, caused by the actions and interactions of multiple genes and environmental factors. Numerous studies have focused on the role of chemotactic cytokines, also kn...
background periodontitis is a local chronic inflammatory condition of the supporting structures of the teeth resulting from a dental plaque biofilm attached to teeth surfaces. recent studies have indicated that this oral disease may have effects on systemic health. objectives the aim of the present study was to evaluate the association between periodontitis and hyperlipidemia. patients and meth...
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