Data Dictionary: Census 1980 on 2010 Geographies
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Data Source:U.S. Census Bureau & Social Explorer
Table: T25. Persons 65 Years And Over In Household And Household Type [5]
Universe: Households With One Or More Persons 65 Years And Over
Table Details
T25. Persons 65 Years And Over In Household And Household Type
Universe: Households With One Or More Persons 65 Years And Over
Relevant Documentation:
Excerpt from: Social Explorer, U.S. Census Bureau; Census of Population and Housing, 1980 [United States]: Summary Tape File 1a [Computer file]. ICPSR version. Washington, DC: U.S. Dept. of Commerce, Bureau of the Census [producer], 1982. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2002.
 
Age
Age at last birthday, i.e., number of completed years from birth to April 1, 1980, based on replies to a question on month and year of birth. This item was asked on a complete-count basis.

Because of the central importance of the data on age, the question contains redundancies. The age entry on the basic tape record is derived from the FOSDIC entries of quarter and year of birth. For those persons who do not provide this information but who do provide "age at last birthday," the census enumerator or clerk uses an equivalency table to mark the appropriate FOSDIC circles. The item "age at last birthday" is used only secondarily because of the tendency of some people, in reporting their ages, to round off to "0" or "5" (and to report even rather than odd numbers). The write-in entries of month and year of birth are requested because some people have difficulty with (and therefore skip) the FOSDIC marking system in this question.

Age is tabulated by single years of age and by many different groupings such as 5-year age groups. Basic records identify single years (and quarter years on sample basic records) to 112.

Median age
Calculated as the value which divides the age distribution into two equal parts, one-half the cases falling below this value, one-half above. Median age is computed from the age intervals or groupings shown in the particular tabulation, and thus a median based on a less detailed distribution may differ slightly from a corresponding median for the same population based on a more detailed distribution. If the median falls in the terminal category, e.g., 75 years and over, the median is shown as the initial age of the category with a plus sign, e.g., 75+.

Limitations
In previous censuses, undercoverage of the population has been associated with age. Young adults, especially Black males, were missed at a higher rate than other segments of the population.

Historical comparability
Age data have been collected in each census since 1790. Counts in 1970 and 1980 for persons 100 years old and over were substantially overstated.

See also: "Age of Householder."

Excerpt from: Social Explorer, U.S. Census Bureau; Census of Population and Housing, 1980 [United States]: Summary Tape File 1a [Computer file]. ICPSR version. Washington, DC: U.S. Dept. of Commerce, Bureau of the Census [producer], 1982. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2002.
 
In household
Persons in the household include:

  • Householder - The person who was reported in column 1. This reference person was to be the person or one of the persons in whose name the home was owned or rented. If there was no such person, any adult household member at least 15 years old who was not a roomer, boarder, or paid employee was to be reported in column 1. In complete-count tabulations, the number of householders is the same as the number of households or occupied housing units. In sample tabulations, the numbers may not always be the same because of differences in weighting sample data.
  1. Family householder - A householder living with one or more persons related to him or her by birth, marriage, or adoption.
  2. Nonfamily householder - A householder living alone or only with persons not related to him or her.


Excerpt from: Social Explorer, U.S. Census Bureau; Census of Population and Housing, 1980 [United States]: Summary Tape File 1a [Computer file]. ICPSR version. Washington, DC: U.S. Dept. of Commerce, Bureau of the Census [producer], 1982. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2002.
 
Household Type
Households are classified by type according to sex of the householder and the presence of relatives based on questions asked on sex and household relationship. This item was determined on a complete-count basis.

Family household
A household including a family (See: "Family"). A family household may also include nonrelatives living with the family. The following subcategories are frequently provided: married-couple family; family with male householder, no wife present; and family with female householder, no husband present (see: "Family Type").

Nonfamily household
A household consisting of a person living alone or of a householder living with other unrelated individuals (see: Unrelated Individual).

Historical comparability
In 1970, nonfamily households were termed primary individual households, a primary individual being a person living alone or the head of a household in which no relatives were present.

See also: "Family;" "Family Type;" "Unrelated Individual."

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