rank order 1 (AAPR, 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

validity of personality ratings (AAPR, 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 information at all
1 = Not at all
2 = To a minor extent
3 = To only some extent
4 = To a considerable extent
5 = To a marked extent
6 = To an extreme degree