OC055: Evaluating the use of Classification and Regression Tree (CART) analysis in second-trimester Down syndrome screening
نویسندگان
چکیده
منابع مشابه
Screening for Down syndrome in the second trimester of pregnancy.
Antenatal screening for fetal anomalies has provided women and their partners with information to make reproductive choices based on the risk of serious chromosomal or structural defects since the 1990s. Alternative tests include first-trimester screening (combined ultrasound and maternal serum markers), second-trimester maternal serum markers and noninvasive cell-free DNA testing. The recent r...
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within the components of communicative competence, a special emphasis is put on the “rules of politeness,” specifically the politeness strategies (brown and levinson, 1978) that speakers deploy when performing the request speech act. this is because the degree of imposition that making a request places upon one’s interlocutor(s) has been seen to be influenced by several factors among which, as ...
Role of second-trimester genetic sonography after Down syndrome screening.
OBJECTIVE To estimate the effectiveness of second-trimester genetic sonography in modifying Down syndrome screening test results. METHODS The First and Second Trimester Evaluation of Risk (FASTER) aneuploidy screening trial participants were studied from 13 centers where a 15- to 23-week genetic sonogram was performed in the same center. Midtrimester Down syndrome risks were estimated for fiv...
متن کاملcomparative analysis of the use of hedges & emphatics in english and persian academic research articles of sociology & psychology
چکیده ندارد.
15 صفحه اولClassification and Regression Tree (CART) Techniques
In certain research studies development of a reliable decision rule, which can be used to classify new observations into some predefined categories, plays an important role. The existing traditional statistical methods are inappropriate to use in certain specific situations, or of limited utility, in addressing these types of classification problems. There are a number of reasons for these diff...
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ژورنال
عنوان ژورنال: Ultrasound in Obstetrics and Gynecology
سال: 2008
ISSN: 0960-7692,1469-0705
DOI: 10.1002/uog.5463