For Down syndrome, which statement best compares the PPV of maternal serum screening to Panorama?

For Down syndrome, which statement best compares the PPV of maternal serum screening to Panorama?

• A. 50% vs 50%
• B. 95% vs 3.4%
• C. 3.4% vs 95%
• D. 1% vs 99%

Answer: (C)