Columbia subject headings:
Older people--Care--United States--Longitudinal studies.
Older people--United States--Social conditions--Longitudinal studies.
Social status.
Harvard subject headings:
Older people--Health and hygiene--United States--Longitudinal studies.
Older people--United States--Social conditions--Longitudinal studies.
Social status.
Princeton subject headings:
Older people--Health and hygiene--United States--Longitudinal studies.
Older people--United States--Social conditions--Longitudinal studies.
Social status.