Table 3.

Ancestry profile of the riverine populations of Amazon.

Ancestry	Total n = 794	Tapajós n = 446	Tucuruí n = 348	p-Value Tapajós vs. Tucuruí
European (%)	42.4 (32.7–51.1)	42.9 (31.7–53.1)	41.7 (33.5–49.2)	0.255
Amerindian (%)	31.9 (22.6–41.7)	30.5 (21.3–42.5)	32.4 (25.1–41.1)	0.174
African (%)	22.9 (16.4–30.7)	22.9 (17.2–30.4)	22.6 (15.8–31.6)	0.800

Data are presented as median and interquartile ranges. No difference was found between participants from Tapajós River basin and Lake of Tucuruí (Mann–Whitney test).