DAST history - how Skinner's tool was created
The DAST was developed in 1982 by Canadian researcher Harvey A. Skinner at the Addiction Research Foundation in Toronto (now part of CAMH). The first publication appeared in Addictive Behaviors (Skinner H.A., 1982, vol. 7, pp. 363-371; PMID: 7183189).
Why was DAST created?
Skinner designed DAST as a counterpart to the MAST (Michigan Alcohol Screening Test) for substances other than alcohol. The aim was to build a tool that a primary-care physician or therapist could use during a standard appointment without specialist training.
From DAST-28 to DAST-10
The original version contained 28 questions. Psychometric analysis showed that the 10 strongest items retained almost full diagnostic accuracy with a much shorter completion time. DAST-10 has become the standard for ambulatory screening and is recommended by NIDA (National Institute on Drug Abuse) in the United States.
Test structure - 10 questions, 0-10 scale and reverse scoring
DAST-10 consists of 10 yes/no questions scored on a 0-1 scale. The maximum total is 10 points. The items cover key domains for diagnosing substance use disorder per ICD-10/ICD-11.
Diagnostic domains
- Use pattern (Q1-2) - non-medical use, polypharmacy
- Loss of control (Q3) - ability to stop using
- Psychological consequences (Q4-5) - flashbacks, blackouts, guilt
- Social consequences (Q6-8) - concern from close ones, family neglect, illegal acts
- Physiological symptoms (Q9-10) - withdrawal symptoms, medical problems
Question 3 - reverse scored
Question 3 reads: "Are you always able to stop using medications when you want to?" and is reverse scored. The answer No gives 1 point (signalling loss of control); the answer Yes gives 0. This pattern follows Skinner's original construction and is intentional - it helps detect respondents who would otherwise minimise their problem in a yes/yes pattern.
Result interpretation - 4 CAMH thresholds and recommended interventions
CAMH defines four score thresholds and assigns specific clinical recommendations to each. The cutoff of 3 points is the most frequently cited threshold for likely substance use disorder requiring further assessment.
0-2 points - no or low level of problems
Medication use does not indicate a problem. Recommended intervention: monitoring and possible reassessment in the future. Basic education on the risks of using medications outside indications.
3-5 points - moderate level of problems
The use pattern may already be causing consequences. Recommended intervention: further clinical assessment by a psychiatrist or addiction specialist. A focused interview and brief motivational intervention are often enough.
6-8 points - substantial level of problems
Answers suggest current substance use disorder with health and social harm. Recommended intervention: intensive clinical assessment, consideration of medication misuse treatment, including pharmacological detox and addiction psychotherapy.
9-10 points - severe level of problems
The score strongly suggests advanced substance use disorder with likely complications. Recommended intervention: urgent specialist evaluation and a full treatment plan - detox, pharmacotherapy for craving and psychotherapy.
DAST vs AUDIT and DUDIT - when to use each test
Three different tools are used to screen for substance-related disorders, each covering a different range of substances.
DAST-10 - medications and substances other than alcohol
Covers all psychoactive substances other than alcohol: prescription medications used outside their indications (benzodiazepines, opioids, stimulants), over-the-counter medications used in excess and illicit substances. This is the tool of choice when medication misuse is suspected.
AUDIT - alcohol
The AUDIT test (Babor et al., WHO 1989) assesses risk associated solely with alcohol. 10 questions on a 0-4 scale, diagnostic threshold 8 points.
DUDIT - illicit drugs
The DUDIT test (Berman et al., Karolinska Institutet 2002/2005) is more detailed and better differentiates use patterns of specific illicit substances. 11 questions, 0-44 scale.
When to choose DAST?
DAST-10 is best when you suspect prescription or over-the-counter medication misuse - sleeping pills, sedatives, opioid analgesics, stimulants. If the problem involves illicit substances more broadly, DUDIT is more appropriate. For alcohol, AUDIT.
DAST limitations - what the questionnaire will not detect
DAST-10 is a screening tool and does not replace clinical diagnosis. Substance use disorder can only be diagnosed by a psychiatrist or addiction specialist based on a full clinical assessment (ICD-10/ICD-11 or DSM-5 criteria).
When can the result be inaccurate?
- Minimisation - people with addiction often understate their answers (denial). DAST relies entirely on self-report.
- Patients on long-term treatment - those taking opioids for chronic pain or benzodiazepines for anxiety may produce a positive score while using medications as prescribed. Clinical context is essential.
- Older patients - polypharmacy is common in older age and requires separate assessment by a geriatrician.
- No KCPU validation for Polish - the Polish version of DAST has no official translation by the National Centre for Addiction Prevention. We use an in-house translation based on the Skinner/CAMH original.
DAST does not differentiate between substances
The test shows that there is a problem with medications or other substances but does not indicate which ones specifically. Full diagnosis requires a clinical interview, possibly toxicology and biochemistry tests (liver function, complete blood count, ECG).
The DAST-10 test is indicative only and does not constitute a medical diagnosis. If the result concerns you, book a consultation with a specialist.
