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Reported birth weight, grouped categories

Codes and Frequencies

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For sample persons under age 18, whose biological mother or father is the respondent, BWGTGP is a recoded variable that reports the person's birth weight in several pre-specified categories. Please see the Codes tab for detailed information about the categories provided.

This variable is part of the 1981 and 1988 Child Health Supplement. Please use the IPUMS NHIS drop-down menus and search function to find other variables related to this supplement.


The 1981 and 1988 Child Health Supplement collected information about children 17 years of age and younger on a wide range of topics, including: family structure, child care, breastfeeding, development, medications, birth and prenatal events, hospitalizations and surgery, chronic conditions, weight, school, behavior problems, social issues, and sleep habits. All questions were asked of the adult best able to provide accurate information about the child. The preferred respondents for this supplement, in order of priority, are: biological mother, biological father, an adoptive, step, or foster parent, a legal guardian, a primary caretaker, or another adult.


There is a slight different in the birth weight categories provided between 1981 and 1988. In 1988 an additional category indicating 5 ½ pounds or more, but unknown if more or less than 9 pounds is available. This category is not provided in 1981.


  • 1981: Sample persons under age 18, whose respondent was biological parent.
  • 1988: Sample persons under age 18.


  • 1981, 1988