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.
| Population | Demirjian | Willems |
|---|---|---|
| Boys | Overestimation (0.74 years) | Underestimation (0.11 years) |
| Girls | Overestimation (0.51 years) | Negligible difference |
| Overall | Overestimation (0.45 years) | Underestimation (0.09 years) |
