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Codes and Frequencies

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For households, ROOMS indicates the number of rooms in the housing unit. Respondents were instructed to include the kitchen but not bathroom(s).

For related variables, please use the IPUMS NHIS search function and drop-down menus.


Changes in the sampling universe may affect comparability over time.


  • 1965: Households in 2 quarters.
  • 1966-1967: All households.
  • 1968: Households in housing units in 2 quarters.
  • 1973-1981: All households in housing units.


  • 1965-1968, 1973-1981