For interviews conducted in-person, respondents were shown a card depicting the torso of the body divided into nine sections and were asked to indicate the numbers where their pain was located (ABPCARLOC1, ABPCARLOC2, ABPCARLOC3, ABPCARLOC4, ABPCARLOC5, ABPCARLOC6, ABPCARLOC7, ABPCARLOC8, ABPCARLOC9).

For telephone interviews, respondents were asked if their pain was located above ABPABOVWAST), below (ABPBELOWAST), or around (ABPATWAST) the waistline, and, if their pain was located on the right side (ABPRITSIDE), left side (ABPLEFSIDE), or down the middle (ABPDOWNMID) of their abdomen.

Information gathered from the in-person and telephone interviews was then recoded to create variables corresponding to upper/above waistline right (ABPAINLOCR1), upper/above waistline midline (ABPAINLOCR2), upper/above waistline left (ABPAINLOCR3), mid/around waistline right (ABPAINLOCR4), mid/around waistline midline (ABPAINLOCR5), mid/around waistline left (ABPAINLOCR6), lower/below waistline right (ABPAINLOCR7), lower/below waistline midline
(ABPAINLOCR8), lower/below waistline left (ABPAINLOCR9).