Screening for trisomies in dichorionic twins by measurement of fetal nuchal translucency thickness according to the mixture model

2011 ◽  
Vol 31 (1) ◽  
pp. 16-21 ◽  
Author(s):  
David Wright ◽  
Argyro Syngelaki ◽  
Ismini Staboulidou ◽  
Jader de Jesus Cruz ◽  
Kypros H. Nicolaides
Keyword(s):  
Mixture Model ◽  
Nuchal Translucency

scholarly journals P06.06: Quality control for nuchal translucency measurements based on a mixture model

2011 ◽  
Vol 38 (S1) ◽  
pp. 184-185
Author(s):  
C. Comas ◽  
M. Echevarria ◽  
M. Rodríguez ◽  
I. Rodríguez ◽  
A. Serrano
Keyword(s):  
Quality Control ◽  
Mixture Model ◽  
Nuchal Translucency

A mixture model of nuchal translucency thickness in screening for chromosomal defects: validation of a single operator dataset

2010 ◽  
Vol 30 (11) ◽  
pp. 1100-1106 ◽  
Author(s):  
A. Gasiorek-Wiens ◽  
S. Kotsis ◽  
I. Staboulidou ◽  
M. Stumm ◽  
R. D. Wegner ◽  
...  
Keyword(s):  
Mixture Model ◽  
Nuchal Translucency ◽  
Single Operator ◽  
Chromosomal Defects

A mixture model of nuchal translucency thickness in screening for chromosomal defects

2008 ◽  
Vol 31 (4) ◽  
pp. 376-383 ◽  
Author(s):  
D. Wright ◽  
K. O. Kagan ◽  
F. S. Molina ◽  
A. Gazzoni ◽  
K. H. Nicolaides
Keyword(s):  
Mixture Model ◽  
Nuchal Translucency ◽  
Chromosomal Defects

The association of Raynaud’s phenomenon/syndrome with scleroderma and Sjögren’s syndrome – a meta-analysis

VASA ◽  
2008 ◽  
Vol 37 (Supplement 73) ◽  
pp. 26-32 ◽  
Author(s):  
Schlattmann ◽  
Höhne ◽  
Plümper ◽  
Heidrich
Keyword(s):  
Quantitative Analysis ◽  
Sjögren’S Syndrome ◽  
Mixture Model ◽  
Sjögren's Syndrome ◽  
Meta Analysis ◽  
Sjogren’S Syndrome ◽  
Sjogren's Syndrome ◽  
Raynaud’S Syndrome ◽  
Raynaud's Syndrome ◽  
Sjögren‘S Syndrome

Background: In order to analyze the prevalence of Raynaud’s syndrome in diseases such as scleroderma and Sjögren’s syndrom – a meta-analysis of published data was performed. Methods: The PubMed data base of the National Library of Medicine was used for studies dealing with Raynaud’s syndrome and scleroderma or Raynaud’s syndroem and Sjögren’s syndrom respectively. The studies found provided data sufficient to estimate the prevalence of Raynaud’s syndrome. The statistical analysis was based on methods for a fixed effects meta-analysis and finite mixture model for proportions. Results: For scleroderma a pooled prevalence of 80.9% and 95% CI (0.78, 0.83) was obtained. A mixture model analysis found four latent classes. We identified a class with a very low prevalence of 11%, weighted with 0.15. On the other hand there is a class with a very high prevalence of 96%. Analysing the association with Sjögren’s syndrome, the pooled analysis leads to a prevalence of Raynaud’s syndrome of 32%, 95% CI(26.7%, 37.7%). A mixture model finds a solution with two latent classes. Here, 38% of the studies show a prevalence of 18.8% whereas 62% observe a prevalence of 38.3%. Conclusion: There is strong variability of studies reporting the prevalence of Raynaud’s syndrome in patients suffering from scleroderma or Sjögren’s syndrome. The available data are insufficient to perform a proper quantitative analysis of the association of Raynaud’s phenomenon with scleroderma or Sjögren’s syndrome. Properly planned and reported epidemiological studies are needed in order to perform a thorough quantitative analysis of risk factors for Raynaud’s syndrome.

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