Table 2.
Difference among the nuchal fold thickness measurements by two- and three-dimensional ultrasonography.
| Minimum (mm) | Maximum (mm) | Mean (mm) | Standard deviation (mm) | Significancy (P) |
|---|---|---|---|---|
| −1.09 | 3.12 | 0.38 | 0.80 | 0.001 |
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.