Physical discomfort, Pleasant emotions, Testing self-control, Need, Pleasant moments, Unpleasant emotions and Conflict with others.

The questionnaire is comprised of 100 items (long version) that are answered on a 4-point scale (never, occasionally, often, almost always). The items are designed to measure eight subscales. Six of these (physical discomfort, pleasant emotions, testing self-control, need and pleasant moments) are represented with 10 items and the remaining two (unpleasant emotions and conflict with others) are represented by 20 items in each category.

We worked with 274 patients in treatment to obtain its psychometric characteristics, presenting the eight subscales a normal distribution and adequate content validity as part of its internal structure; and adequate external reliability and validity.

It can be applied using pencil and paper or in a computerized format. Completing it requires about 20 minutes.

The scores in each subscale range from 0 to 100, and indicate the magnitude of the customer's problem related to excessive use on that scale (see Table 2). For example, a score of 0 in a subscale indicates that the client never drank too much in that situation over the past year, and therefore is a situation that poses no risk for the customer. At the other end, a score of between 67 and 100 indicates very frequent excessive use in that situation over the past year, and therefore the therapist should consider this situation as high risk. The problem score or index, is calculated by dividing each subscore between the maximum subscore in each subscale and multiplying it by 100. the items are scored as follows: response of 0 = Low risk, response of 1-33= moderate risk, response of 34-66 = High risk, and response of 67-100 = Very high risk.

Annis, H, Graham MJ, CS Davis. Inventory of Drinking Situations (IDS). User's Guide. Addiction Research Foundation Toronto, 1987.