Differences in performance on the chromatic Vs. Achromatic H-T-P drawings

The effect of differences in the distrib

The effect of differences in the distribution of maternal age in England and Wales on the performance of prenatal screening for Down's syndrome

✍ T. Huang; H. C. Watt; N. J. Wald 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 226 KB 👁 3 views

We aimed to determine how differences in the age at which women had their pregnancies influenced the expected detection and false-positive rates of serum screening for Down 's syndrome (i) between 1970 and 1993 in England and Wales, and (ii) between regions and districts of England and Wales in 1991