Terms used to refer to Indigenous populations vary by country, by database, by discipline, and by whose perspective is privileged.
"For most tribes, there is one tribal term of self-reference and one other term, either corrupted from the original or entirely foreign. Sometimes those corrupted terms are more common than the more accurate ones tribes and tribal people use. Such is the case for the people the Spanish called Navajo but who call themselves Diné". (Anton Treuer, Everything You Wanted to Know About Indians But Were Afraid To Ask)
In United States research literature, as well as coloquially, people use "Native American", "American Indian", "Alaska Native", "Native", and very rarely, "Indigenous".
In Canada
Databases use different terms to form subject headings for Indigenous peoples
To be both efficient and thorough, use both the database's subject heading for an Indigenous population as well as locally preferred terms
("American Indian or Alaska Native"[Mesh] OR "Three Affiliated Tribes" OR Mandan OR Hidatsa OR Arikara OR "Fort Berthold")
((MH "Native Americans") OR "Three Affiliated Tribes" OR Mandan OR Hidatsa OR Arikara OR "Fort Berthold")
"American Indian or Alaska Native"[Mesh] - NEW TERM - use for articles published in 2022 or later.
- for articles published 1990 to 2021, use "Indians, North American"[Mesh]
"Indians, North American"[Mesh] - OLD TERM - only used on articles published 1990 to 2021
- for articles published in 2022 or later, use "American Indian or Alaska Native"[Mesh]
"Indians, Central American"[Mesh]
"Indians, South American"[Mesh]
"Health Disparity, Minority and Vulnerable Populations"[Mesh]
"Health Services, Indigenous"[Mesh]
"United States Indian Health Service"[Mesh]
(MH "Arctic Peoples") (up until 2021, the subject heading was "Eskimos [Note: "For genetic and physiological as well as cultural and social discussion of Eskimos.")
(MH "First Nations of Canada")
(MH "Inuit") [NOTE: "Group of culturally similar indigenous peoples of Arctic and near-Arctic Canada, Alaska, and Greenland."
(MH "First Nations of Australia")
(MH "Native Americans") [NOTE: "For native peoples of the United States and non-Arctic Alaska regions"]
*there are more terms for specific nations and tribes, see here for the full list
(MH "Health Services, Indigenous") scope note: "Health care provided to specific cultural or tribal members which incorporates local customs, beliefs, and taboos."
(MH "Indigenous Health") scope note: "The physical, mental, and emotional wellbeing of Indigenous Peoples."
(MH "Medicine, Traditional") scope note: "A general term for any system of medicine that has ancient or primitive origin, cultural bonds, and trained or traditional healers. General only; prefer specifics."
(MH "Medicine, Native American Traditional") scope note: "Traditional medicine based on the customs, beliefs, and practices of Native American cultures."
(DH "Traditional Healers") scope note: "Health personnel who provide health care and advice to their communities utilizing traditional knowledge."