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The Dual Diagnosis Screening Interview (DDSI) is a screening interview designed to detect the most common comorbid psychiatric diagnoses in substance users: Panic, Generalized Anxiety, Simple Phobias, Social Phobia, Agoraphobia, Depression, Dysthymia, Mania, Psychosis, ADHD and PTSD. Its psychometric characteristics, together with the brevity required for its training and management, make the DDSI an adequate instrument for detecting psychiatric comorbidity in substance users in clinical practice.

    Characteristics of the instrument

Time of administration about 15-20 minutes depending 

on the interviewee. 

The DDSI has shown a sensitivity and specificity around 

80% for most of the evaluated diagnosis.

It can be administered by lay interviewers after a brief 

training course of 90 minutes.

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