-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

Takes pleasure in few activities (SIDP-IV, intake, CE)
-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
0 = Not present or limited to rare isolated examples
1 = Subthreshold-some evidence of the trait
2 = Present-criterion is clearly present for most of the last 5 years
3 = Strongly present-criterion is associated with subjective distress or impairment in functioning

Self-injurious behavior not intending to die (SIDP-IV, intake, CE)
-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
0 = No
1 = Yes

Opinion of patient (SIDP-IV, intake, CE)
-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 = Almost never
2 = Some of the time
3 = Much of the time
4 = A great deal of the time
5 = Almost constantly