نتایج جستجو برای: historical cohort study
تعداد نتایج: 4106209 فیلتر نتایج به سال:
BACKGROUND Massive hemorrhage during craniofacial surgery is common and often results in hypovolemia and hypotension. We conducted this study to assess the effect of the addition of routine central venous pressure (CVP) monitoring on the incidence of intraoperative hypotension and to evaluate the relationship between CVP and hypotension in this population. METHODS Data from our prospective cr...
terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...
BACKGROUND High levels of endotoxin have been reported as a risk factor for mortality in critical patients. Toraymyxin® is a column designed to remove circulating blood endotoxin by direct hemoperfusion widely used in Japan. OBJECTIVES To evaluate the effect of direct hemoperfusion with Toraymyxin® (DHP-PMX) as an adjuvant treatment in patients with severe sepsis due to intestinal perforation...
Aim: As to the assessment of occlusal status pertaining to primary canines and molars, the latter is less within reach as it is difficult to guide jaws towards a centric occlusion while maintaining a vintage point in both direct and indirect observation. This study was originally intended to assess primary canine occlusion as a practical indicator in the evaluation of primary molar occlusion, ...
hepatitis b virus (hbv) infection is the most common cause of end stage liver disease in iran and in golestan province. large-scale population-based prospective cohort studies with long term follow-up are the method of choice to accurately understand the natural course of hbv infection. to date, several studies of hbv epidemiology, natural history, progression to cirrhosis and association with ...
the geopolitics of afghanistan after september 11, 2001, and its impact on iranian national security
abstract u.s. attack to afghanistan after 9/11 provided opportunities for us who tried to become the dominant power after collapse of ussr and bipolar world. thinkers like fukuyama believed american liberal democrats thought would be universally accepted without resistances. liberal democracy is the best and final model of governance; in this regard, united state has moral responsibilities for...
BACKGROUND Multivariable confounder adjustment in comparative studies of newly marketed drugs can be limited by small numbers of exposed patients and even fewer outcomes. Disease risk scores (DRSs) developed in historical comparator drug users before the new drug entered the market may improve adjustment. However, in a high dimensional data setting, empirical selection of hundreds of potential ...
Aim. To highlight challenges and lessons learnt from using a retrospective cohort design and historical birth records to determine whether infants born growth restricted achieve the same health-related quality of life in adulthood as infants born at normal birthweights for gestation. Study design. The cohort consisted of 50-year-old adults who were born between 1954 and 1956 in the Royal Matern...
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