نتایج جستجو برای: bias and monitoring

تعداد نتایج: 16888053  

Journal: :BMC Anesthesiology 2009
John F Stover Reto Stocker Renato Lenherr Thomas A Neff Silvia R Cottini Bernhard Zoller Markus Béchir

BACKGROUND Monitoring of cardiac output and blood pressure are standard procedures in critical care medicine. Traditionally, invasive techniques like pulmonary artery catheter (PAC) and arterial catheters are widely used. Invasiveness bears many risks of deleterious complications. Therefore, a noninvasive reliable cardiac output (CO) and blood pressure monitoring system could improve the safety...

ژورنال: پژوهش در پزشکی 2005
حمید علوی مجد, , مریم شبیری, , نایبعلی احمدی, , یدا... محرابی, ,

 Background : Meta analysis is a statistical method to combine the findings of a set of large number of published individual studies and re-analyse them. The use of meta-analysis methods in medical research has been increased, noticeably, in resent years. However, one of the major shortcomings in such analysis is that the researcher, could not access all conducted studies in the area of concern...

2014
Vincenzo Gervasi Henrik Brøseth Olivier Gimenez Erlend B Nilsen John D C Linnell

Theory recognizes that a treatment of the detection process is required to avoid producing biased estimates of population rate of change. Still, one of three monitoring programmes on animal or plant populations is focused on simply counting individuals or other fixed visible structures, such as natal dens, nests, tree cavities. This type of monitoring design poses concerns about the possibility...

2011
Tushar Agrawal Indira Gandhi Arun Kumar Vaidya

This paper estimates returns to education in India using a nationally representative survey. We estimate the standard Mincerian wage equation separately for rural and urban sectors. To account for the possibility of sample selection bias, Heckman two-step procedure is used. The findings indicate that returns to education increase with the level of education and differ for rural and urban reside...

2005
Michael Schwartz

It is widely unclear as to whether start-up firms supported by publicly-initiated incubator initiatives have higher survival rates than comparable start-up firms that have not received support by such initiatives. This paper contributes to the underlying discussion by performing an empirical analysis of the long-term survival of 371 incubator firms (after their graduation) from five German incu...

2008
D. R. Lorimer

We present 3 yr of timing observations for PSR J1453+1902, a 5.79-ms pulsar discovered during a 430-MHz drift-scan survey with the Arecibo telescope. Our observations show that PSR J1453+1902 is solitary and has a proper motion of 8± 2 mas yr. At the nominal distance of 1.2 kpc estimated from the pulsar’s dispersion measure, this corresponds to a transverse speed of 46± 11 km s, typical of the ...

2009
Elodie DJEMAI

This paper empirically analyzes the influence of road proximity on HIVinfection using geographical data on road infrastructure and the Demographic and Health Surveys collected in six African countries. Firstly we show that living in proximity to a major road increases the individual risk of infection. This observed relationship is found to be sensitive to the use of the road and to be robust af...

Journal: :Journal of rehabilitation research and development 2006
Anna M Barrett Stephanie Burkholder

Monocular patching is a possible inexpensive treatment for spatial neglect. Previous studies were unpromising, but since neglect symptoms are heterogeneous, fractionating spatial bias may detect significant effects of patching. Poststroke, perceptual-attentional (PA) spatial bias, motor-intentional (MI) spatial bias, or both may occur. In this study, six poststroke subjects bisected lines while...

Journal: :medical journal of islamic republic of iran 0
motahareh zhianpour from the departments of radiology and epidemiology, isfahan university of medical sciences and heath services, isfahan, iran mohsen janghorbani from the departments of radiology and epidemiology, isfahan university of medical sciences and heath services, isfahan, iran

errors and variations in interpretation can happen in clinical imaging. few studies have examined the biased effect of clinical information on reporting of brain ct scans. in a blinded double crossover design, we studied whether three radiologists were biased by clinical information when making ct scan diagnosis of the brain. three consultant radiologists in three rounds with at least a one-mon...

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