Age (BIQ-SO, intake, SO)
-9999 = Missing
-8888 = Question not asked
-7777 = Form updated during study, question not on new form
-6666 = Participant failed to complete
-3333 = Not applicable, nested question
-1111 = Participant deceased

Gender (BIQ-SO, intake, SO)
-9999 = Missing
-8888 = Question not asked
-7777 = Form updated during study, question not on new form
-6666 = Participant failed to complete
-3333 = Not applicable, nested question
-1111 = Participant deceased
0 = Male
1 = Female

Ethnicity (BIQ-SO, intake, SO)
-9999 = Missing
-8888 = Question not asked
-7777 = Form updated during study, question not on new form
-6666 = Participant failed to complete
-3333 = Not applicable, nested question
-1111 = Participant deceased
0 = Hispanic or Latino
1 = Not Hispanic or Latino

Race (BIQ-SO, intake, SO)
-9999 = Missing
-8888 = Question not asked
-7777 = Form updated during study, question not on new form
-6666 = Participant failed to complete
-3333 = Not applicable, nested question
-1111 = Participant deceased
0 = American Indian or Alaska Native
1 = Asian
2 = Black or African American
3 = Native Hawaiian or Other Pacific Islander
4 = White
5 = Mixed/more than 1 race selected

Relationship to participant (BIQ-SO, intake, SO)
-9999 = Missing
-8888 = Question not asked
-7777 = Form updated during study, question not on new form
-6666 = Participant failed to complete
-3333 = Not applicable, nested question
-1111 = Participant deceased
1 = Spouse
2 = Long term domestic partner (lived together 1+ year)
3 = Romantic partner living w/partner <1yr
4 = Romantic partner but not living together
5 = First degree relative
6 = Other relative
7 = Friend
8 = Roommate
9 = Coworker

Lives within 50mi of participant (BIQ-SO, intake, SO)
-9999 = Missing
-8888 = Question not asked
-7777 = Form updated during study, question not on new form
-6666 = Participant failed to complete
-3333 = Not applicable, nested question
-1111 = Participant deceased
0 = No
1 = Yes