The CIDI-SF uses a stem-branch logic in which a small number of initial diagnostic stem questions are used in each section to skip-out people who are least likely to be cases before they are asked further symptom questions. For major depressive episode, participants meet the stem requirement by endorsing two weeks of depressed mood, at least most of the day, for at least almost every day, or endorsing two weeks of anhedonia, at least most of the day, for at least almost every day. If the participant endorses either of these stems, they are queried about additional depression symptoms, including feeling tired, change in weight, trouble with sleep, trouble concentrating, feeling down, and thoughts about death. The persons’s MDE score (0–7) is then calculated as the sum of the positive responses to each of these questions. The diagnostic stem requirement for generalized anxiety is met when the participant reports a period of feeling worried, tense, or anxious that lasted at least six months. The CIDI-SF also assesses for panic attacks, not panic disorder per se, because the time-frame for the
