According to the Field Representative's Manual for 1999, this set of questions was included "to determine if the Sample Adult has been or still is depressed in the past 12 months and, if so, how it affected them physically and emotionally, how long it has affected them, how they dealt with these problems, and how much these problems interfered with their life or activities."

To be asked the question associated with DEPWKNO, respondents had to report experiencing one of the following symptoms:

• Lost interest in most things ("Yes" in DEPLI)

• Felt more lethargic than usual ("Yes" in DEPLETH)

• Weight changed 10+ pounds ("Gain," "Lose," or "Volunteered 'both gained and lost weight'" in DEPWT and "10+" in DEPWTAMT or "Yes" in DEPWT10)

• Had trouble sleeping every night or nearly every night ("Yes" in DEPINSOM and "Every night" or "Nearly every night" in DEPINSOMOFT)

• Had trouble concentrating ("Yes" in DEPCONCEN)

• Felt worthless or no good ("Yes" in DEPNOGOOD)

• Thought about death ("Yes" in DEPSUICID)

The reference period for these symptoms was the two-week period during the past 12 months when the feelings of being sad, blue, or depressed were the worst. Respondents who reported experiencing one or more of these symptoms were asked the series of supplemental questions that included DEPWKNO (Total number of weeks felt sad/blue/depressed during past 12 months). Before reading the first supplemental question, the interviewer stated, "To review, you had two weeks in a row during the past 12 months when you were sad, blue, or depressed and also had some other feelings or problems like:" and read up to three of the symptoms the respondent reported experiencing.

In addition to DEPWKNO, supplemental questions were asked about the following:

• Most recent month felt sad/blue/depressed 2+ weeks (DEPWHENMO)

• Most recent year, 1998-2000, felt sad/blue/depressed 2+ weeks (DEPWHENYR)

• Told doctor about feeling sad/blue/depressed 2+ weeks during the past 12 months (DEPTOLDDR)

• Told health professional about feeling sad/blue/depressed 2+ weeks during the past 12 months (DEPTOLDHP)

• Used medication/drugs/alcohol to cope with feeling sad/blue/depressed (DEPDRUGALC)

• Amount feeling sad/blue/depressed 2+ weeks during the past 12 months interfered with life (DEPINTFERE)

In contrast, answers to the symptom questions can be used to calculate the probability of psychiatric caseness for major depression with dysphoric mood. For more information on the other CIDI-SF variables and for instructions on how to calculate scores for major depression with dysphoric mood, see DEP2WKEV.