نتایج جستجو برای: environmental risk factor
تعداد نتایج: 1981314 فیلتر نتایج به سال:
background: geographic distribution of west nile virus (wnv) is heterogeneous in iran by a high circulation in the southern-western areas. the objective of our study was to determine environmental and climatic factors associated with the risk of wnv equine seropositivity in iran. methods: serological data were obtained from a serosurvey conducted in equine population in 260 districts in iran. ...
BACKGROUND There are several well-established environmental risk factors for ovarian cancer, and recent genome-wide association studies have also identified six variants that influence disease risk. However, the interplay between such risk factors and susceptibility loci has not been studied. METHODS Data from 14 ovarian cancer case-control studies were pooled, and stratified analyses by each...
Multiple sclerosis (MS) is a demyelinating disease of the central nervous system characterized by inflammatory and chronic lesions, local permeability of the blood-brain barrier, and atrophy of the gray and white matter. The etiology of MS is not well understood, but evidence points to the involvement of both genetic and environmental factors. MS also appears to be a heterogeneous disease, with...
the last two decades witnessed a boost in cancer incidences in Syria, as well as high mortality ratios. The influence of the environmental factors was neglected beforehand. The study employed the geographical tools to investigate the environmental distribution of cancer disease and the environmental factor that controls this distribution. The study used the statistical, systematic, analytical d...
The reasons for measuring atopy and airway hyperresponsiveness (AHR) and the methods of validating measurements of asthma in population studies continue to be debated. The debate has centred around standards against which to validate asthma measurements but the absence of a “gold standard” makes the criterion validation of measurements difficult. Questionnaires will always be useful but cannot ...
OBJECTIVES Environmental tobacco smoke (ETS) is often encountered in the workplace. There have been efforts to apply and enforce state laws limiting workplace smoking. There has been little study of the relative effectiveness of state and/or local laws in affecting both rates of workplace ETS exposure and adult smoking rates. This study investigates these hypotheses, as well as the effect of th...
Background and Objectives: Given the great importance of mother and child health in the community, it is important to identify risk factors during cesarean delivery which is considered as one of the most common gynecological surgeries. Therefore, this study aimed to explore risk factors threatening the health of mother, fetus, and infant during cesarean delivery. Materials and Methods: This gr...
the objective of this study was to evaluate the importance of environmental and genetic factors affecting semen quality; sperm volume (sv), sperm concentration (spco), total sperm (ts), fresh sperm motility (fsm), total fresh motile sperm (tfms), post thaw sperm motility (ptsm), total post thaw motile sperm (tptms), number of produced payout (npp), number of fresh motile sperm in each milt ejac...
nitrous oxide (n2o) has significant impact on global warming and leads to the depletion of ozone in the stratosphere. agricultural soil is regarded as a major source of n2o emissions. in recent years, greenhouse grown vegetables have rapidly developed in china. although excessive fertilizer application in greenhouse vegetable production can result in increased n2o emissions, research data on su...
autism is a developmental disability with age of onset in childhood (under 3 years old), which is characterized by definite impairments in social interactions, abnormalities in speech, and stereotyped pattern of behaviors. due to the progress of autism in recent decades, a wide range of studies have been done to identify the etiological factors of autism. it has been found that genetic and envi...
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