Table 1.
Number of Significant PCs in Each Continental Grouping
| Continent | Populations | Number of Significanta PCs |
|---|---|---|
| All | 52 | 18 |
| Africa | 7 | 4 |
| America | 5 | 4 |
| Central and South Asia | 9 | 5 |
| East Asia | 17 | 4 |
| Europe | 8 | 2 |
| Middle East | 4 | 5 |
| Oceania | 2 | 1 |
a
p < 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.