Age (BIQ, intake, participant)
-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
-2222 = Question not applicable
-1111 = Participant deceased

Race (BIQ, intake, participant)
-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
-2222 = Question not applicable
-1111 = Participant deceased
1 = White
2 = Black
3 = Hispanic
4 = Asian American
5 = Other
9 = Missing

Sex (BIQ, intake, participant)
-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
-2222 = Question not applicable
-1111 = Participant deceased
1 = Male
2 = Female

Marital Status (BIQ, intake, participant)
-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
-2222 = Question not applicable
-1111 = Participant deceased
1 = Single (never married)
2 = Married (first time)
3 = Remarried
4 = Separated
5 = Divorced
6 = Widowed
9 = Missing

Treatment condition (BIQ, intake, participant)
-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
-2222 = Question not applicable
-1111 = Participant deceased
1 = Outpatient
2 = Inpatient

How many years of schooling have you completed (BIQ, intake, participant)
-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
-2222 = Question not applicable
-1111 = Participant deceased
1 = Less than 7 years of school
2 = Junior High School (7th-9th grade)
3 = Some High School (10th-11th grade)
4 = High School
5 = Some college or vocational training
6 = A four-years college program
7 = Graduate or professional training