Respondents did not pass these screening questions if they:

• Did not feel sad, blue, or depressed for 2+ weeks in a row (a "No" in DEP2WKEV); or

• Volunteered in DEP2WKEV that they were on medication/anti-depressants; or

• Reported that their feeling sad, blue, or depressed lasted "Less than half of the day" in DEPDAYAMT; or

• Reported that their feeling sad, blue, or depressed lasted "Less often" in DEPHOWOFT; or

• Had an unknown response in DEP2WKEV, DEPDAYAMT, or DEPHOWOFT.

For more information on the dysphoric mood questions, see DEP2WKEV.

According to the Field Representative's Manual for 1999, this set of questions was included "to determine if the Sample Adult has had or still has a loss of interest in things, indicating undiagnosed depression, 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 DEPLIWKNO, respondents had to report experiencing one of the following symptoms:

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

• Weight changed 10+ pounds ("Gain," "Lose," or "Volunteered 'both gained and lost weight'" in DEPLIWT and "10+" in DEPLIWTAMT or "Yes" in DEPLIWT10)

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

• Had trouble concentrating ("Yes" in DEPLICONCEN)

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

• Thought about death ("Yes" in DEPLISUICID)

The reference period for these symptoms was the two-week period during the past 12 months when respondents had the most complete loss of interest in things. Respondents who reported experiencing one or more of these symptoms were asked the series of supplemental questions that included DEPLIWKNO (Total number of weeks lost interest in activities 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 lost interest in most things and also had some other feelings or problems like:" and read up to three of the symptoms the respondent reported experiencing.

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

• Most recent month lost interest in activities 2+ weeks (DEPLIWHENMO)

• Most recent year, 1998-2000, lost interest in activities 2+ weeks (DEPLIWHENYR)

• Told doctor about losing interest in activities 2+ weeks during the past 12 months (DEPLITOLDDR)

• Told health professional about losing interest in activities 2+ weeks during the past 12 months (DEPLITOLDHP)

• Used medication/drugs/alcohol to cope with loss of interest in activities (DEPLIDRUGALC)

• Amount loss of interest in activities 2+ weeks during the past 12 months interfered with life (DEPLIINTFERE)

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