Article
Effect of deviation of nuchal translucency measurements on the performance of screening for trisomy 21
30 Apr 2009
Abstract excerpt
OBJECTIVES: To examine the effect of deviations in median nuchal translucency thickness (NT) and the spread in measurements on the performance of screening for trisomy 21 by maternal age and fetal NT, and by maternal age, fetal NT and maternal serum biochemistry. METHODS: We simulated the NT and multiples of the median values for pregnancy-associated plasma protein-A (PAPP-A) and free beta-human chorionic...
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