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Supplemental Person Weight 2


SUPP2WT is a 9-digit numeric variable.

0: Not in Universe


SUPP2WT is an IPUMS NHIS-constructed variable that harmonizes the sampling weights for a select subset of the supplements of the original NHIS public use files. In this case, harmonization refers to putting weights from various years and source supplement files into a single, consistently named variable.

For certain supplements, SUPP2WT represents a randomly selected person from a household; for example, a sample person age 18 and older was selected for the 1988 occupational health supplement. In other cases, the supplement survey was administered to all persons; to select one example, all persons interviewed in the 1990 core survey were eligible for the assisted devices supplement. SUPP2WT represents the inverse probability of selection into a supplement, adjusted for non-response with additional post-stratification adjustments for age, race/ethnicity, and sex using the Census Bureau's population control totals.

Beginning in 2011, SUPP2WT is associated with variables from the family disability supplement.

Users should review the documentation for extracted variables--most notably the "Weights" section toward the top of each variable description--to ascertain which weight is the appropriate choice for a given survey year. See the User Notes on the use of sampling weights for additional information.


The sampling schemes for the seven supplements included in SUPP2WT vary both between and within survey years. Users should thus note the universe statements for SUPP2WT, to learn whom the the relevant supplements used in conjunction with this weight represent in each year.


  • 1979: Sample persons.
  • 1988; 1989: Sample persons age 18+.
  • 1990: Persons with a completed assistive devices questionnaire.
  • 1991: Sample persons age 18-44.
  • 1992: Sample persons age 12-21.
  • 1993: Sample persons age 18+ in Qt 3 and Qt 4.
  • 1994-1995: Half of sample persons age 18+.
  • 2011-2017: Adults who received the Family Disability questions.


  • 1979, 1988-1995, 2011-2017