FBNHCAN is a two-digit count variable.

03: Beginning in 2015, top code of 3 or more
21: Prior to 2015, top code of 21 or more
96: Not in Universe
97: Unknown-Refused
98: Unknown-Not Ascertained
99: Unknown-Don't Know

Description

For sample adults, FBNHCAN reports the number of the respondent's full brothers who ever had cancer of any kind.

The Manuals define "full siblings" as people who have "the same biological father and mother." Thus, a respondent's full brother is a brother who has the same biological father and mother as the respondent (i.e., not half-brothers, stepbrothers, adopted brothers, foster brothers, or brothers-in-law).

FBNHCAN is one of a series of related variables in the "Family History" section of the Cancer Module. This section begins with the general comment:

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." For a full list of available cancer family history variables relating to full brothers, see the variable description for FBBLCAN, which reports whether the respondent's full brother ever had bladder cancer.

In addition to asking the number of the respondent's biological daughters who ever had cancer of any kind, the "Family History" section of the 2000 and 2005 Cancer Modules also asked for the number of the respondent's biological daughters (BDNHCAN), biological sons (BSNHCAN), and full sisters (FSNHCAN) who ever had cancer of any kind. For a full list of available cancer family history variables relating to biological daughters, see the variable description for BDBLCAN, for biological sons, see the variable description for BSBLCAN, and for full sisters, see the variable description for FSBLCAN.

Comparability

Although FBNHCAN is substantively comparable across all years, users should note two changes in the recoding of values that may affect analyses of data from multiple cancer supplement years.

The first, and most recent, change affects the top code value for FBNHCAN. Prior to 2015, FBNHCAN was top coded at 21. Starting in 2015, FBNHCAN was top coded at 3. The second change, affecting how missing data values were treated for sample adults who completed only part of the cancer supplement, took place between the 2000 and 2005 cancer supplement. 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, whereas in 2005 and later years, 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

Availability

• 2000, 2005, 2010, 2015

Weights

• 2000, 2005, 2010, 2015 : SAMPWEIGHT