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Biological sons had unknown kind of cancer

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For sample adults with at least one biological son (BSNUM) who ever had cancer of any kind (BSNHCAN), BSUKCAN reports whether the respondent had at least one biological son who ever had an unknown kind of cancer.

Although BSUKCAN is only available in 2000, the broader series of related questions about cancer "Family History" were part of both the 2000, 2005, and 2010 Cancer Modules. In all three years, this section begins with the general comment:

We would like to ask you a few questions about your family history of cancer.

According to the 2000 and 2005 Field Representative's Manuals, the purpose of these family cancer history questions is to "determine the prevalence of cancer in families in the population" to "allow a greater understanding of how data obtained from genetics clinics can be applied to the general population." The 2010 Manual provides a similar rationale, stating that the collection of this data "will allow analysts a greater understanding of how family history relates to cancer."

The Manuals for all three year define "biological" relatives as people related by blood. Thus, a respondent's biological son is a son related to the respondent by blood (i.e., not a stepson, adopted son, foster son, or son-in-law).


BSUKCAN is available only in 2000.


  • 2000: Sample adults age 18+ whose son(s) ever had cancer.


  • 2000