-9999 = Missing
-8888 = Question not asked
-7777 = Form updated during study, question not on new form
-6666 = Participant failed to complete
-5555 = Participant withdrew from study
-4444 = Participant ruled out
-3333 = Not applicable, nested question
-2222 = Question not applicable
-1111 = Participant deceased

Watch pornographic material on internet (IMDB, intake, participant)
-9999 = Missing
-8888 = Question not asked
-7777 = Form updated during study, question not on new form
-6666 = Participant failed to complete
-5555 = Participant withdrew from study
-4444 = Participant ruled out
-3333 = Not applicable, nested question
-2222 = Question not applicable
-1111 = Participant deceased
0 = Less than 3 hours
1 = 3 hours or more
2 = 6 hours or more
3 = 9 hours or more
4 = 12 hours or more