Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sensitivity and specificity of screening for major defects of heart and great arteries using fetal nuchal translucency thickness. Values are percentages (95% confidence intervals)
| Using 95th centile | Using 99th centile | |
|---|---|---|
| Sensitivity | 56.0 (42.0 to 70.0) | 40.0 (26.0 to 54.0) |
| Specificity | 93.8 (93.6 to 94.1) | 99.0 (98.9 to 99.1) |
| Positive predictive value | 1.5 (1.0 to 2.1) | 6.3 (3.7 to 9.0) |
| Negative predictive value | 99.9 (99.8 to 100.0) | 99.9 (99.8 to 100.0) |
