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BFGBCAN
Biological father had gallbladder cancer
Group: Family Cancer History — PERSON

Description

For sample adults whose biological father ever had cancer of any kind (BFHCAN), BFGBCAN reports whether the respondent's biological father ever had gallbladder cancer.

BFGBCAN is one of a series of related variables in the "Family History" section of 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 this and other 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 years define "biological" relatives as people related by blood. Thus, a respondent's biological father is a father related to the respondent by blood (i.e., not a stepfather, adoptive father, foster father, or father-in-law).

I. Related Variables for Biological Father 

Sample adults with a biological father who ever had cancer of any kind (BFHCAN) were asked the follow-up question, "What kinds of cancer did your [biological] father have?" As noted in the 2000, 2005, and 2010 Survey Descriptions, respondents could specify up to two types of cancer for their parents. Besides gallbladder cancer, other possible types of cancer that respondents could report for their biological father were:

  • Skin (don't know what kind) (BFSNCAN)
  • Soft tissue (muscle/fat) (BFSTCAN)

When a respondent reported having a biological father who ever had gallbladder cancer (BFGBCAN) or one of the other kinds of cancers noted above, the respondent was then asked whether their biological father was under 50 years of age when first diagnosed with gallbladder cancer (BFAGBCAN) or whatever other kind of cancer had been reported.

II. Gallbladder Cancer Variables for Other Biological Relatives 

In addition to questions about the respondent's biological father, the "Family History" section of the 2000, 2005, and 2010 Cancer Modules also included questions about respondent's biological son(s), biological daughter(s), full brother(s) (i.e., brother(s) with the same biological father and biological mother as the respondent), full sister(s), and biological mother. For example, to analyze gallbladder cancer, researchers may find the following variables useful:

  • Biological son(s) had gallbladder cancer (BSGBCAN)
  • Number of biological sons with gallbladder cancer (BSNGBCAN)
  • Number of biological sons under 50 years of age when first diagnosed with gallbladder cancer (BSAGBCAN)
  • Biological daughter(s) had gallbladder cancer (BDGBCAN)
  • Number of biological daughters with gallbladder cancer (BDNGBCAN)
  • Number of biological daughters under 50 years of age when first diagnosed with gallbladder cancer (BDAGBCAN)
  • Full brother(s) had gallbladder cancer (FBGBCAN)
  • Number of full brothers with gallbladder cancer (FBNGBCAN)
  • Number of full brothers under 50 years of age when first diagnosed with gallbladder cancer (FBAGBCAN)
  • Full sister(s) had gallbladder cancer (FSGBCAN)
  • Number of full sisters with gallbladder cancer (FSNGBCAN)
  • Number of full sisters under 50 years of age when first diagnosed with gallbladder cancer (FSAGBCAN)
  • Biological mother had gallbladder cancer (BMGBCAN)
  • Biological mother under 50 years of age when first diagnosed with gallbladder cancer (BMAGBCAN)

Similar groups of variables are also available for the other kinds of cancers noted in I above.

Comparability

BFGBCAN is fully comparable between 2005 and 2010.

BFGBCAN is largely comparable between 2000 and 2005/2010, though there may be some difference in the meaning of "refused," "not ascertained," and "don't know" as used in 2000 compared to the meanings of those terms in 2005 and 2010.

The Survey Descriptions for all three years caution that while "all sample adults were to be asked the questions in the Cancer Control Module, some persons did not complete the supplement." However, whereas in 2000, persons who answered less than 50 percent of the questions in the supplement had a value of "not ascertained" automatically inserted in the appropriate fields of the Cancer Control Module file, in both 2005 and 2010, persons who answered none of the questions in the supplement had a value of "not ascertained" automatically inserted in the appropriate fields of the Cancer Control Module file.

Universe

  • 2000; 2005; 2010: Sample adults age 18+ whose father ever had cancer.

Codes and Frequencies



Availability

  • 2000, 2005, 2010
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Weights

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