Alcohol, Smoking and Substance Involvement Screening Test (ASSIST)

Abstract

The Alcohol, Smoking and Substance Involvement Screening Test (ASSIST) Version 3.0 is a globally recognized, brief questionnaire developed by the World Health Organization (WHO) ASSIST Working Group in 2002. Its primary function is to screen for and assess the level of risk associated with non-medical substance use across a wide range of psychoactive substances. The tool is designed to facilitate timely intervention, particularly within primary care and general healthcare settings.

The ASSIST comprises eight questions that evaluate lifetime use, frequency of use in the past three months, indicators of dependence (craving, loss of control), and associated negative consequences (health, social, legal, functional). The resulting Substance Involvement Score (SIS) helps clinicians determine the appropriate level of intervention, ranging from brief advice to specialist referral.

Keywords

Substance Use Disorder, Screening Tool, Alcohol, Tobacco, Cannabis, Opioids, Public Health, World Health Organization (WHO), Psychoactive Substances, Brief Intervention.

Authors

World Health Organisation [WHO] ASSIST Working Group (2002), Sue Henry-Edwards, Rachel Humeniuk, Robert Ali, Vladimir Poznyak, Maristela Monteiro, Thomas F. Babor, Matthew Farrell, Maria L. Formigoni, Jittiwutikarn J., and Simon S.

Purpose

The principal purpose of the ASSIST is to provide a standardized, cross-cultural method for screening individuals for problematic alcohol, smoking, and substance involvement. It goes beyond simple detection by calculating a Substance Involvement Score (SIS) for each substance used, which dictates the severity of risk and guides clinicians toward tailored intervention strategies.

This screening tool is optimized for integration into general healthcare and primary care environments, enabling early detection of high-risk or dependent behaviors before they escalate into full-blown Substance Use Disorders (SUDs).

Construct

The ASSIST measures the complex construct of Substance Involvement, defined as the lifetime and recent patterns of non-medical use of psychoactive substances, alongside the associated behavioral, psychological, and social consequences. The scale evaluates elements crucial to the definition of Substance Use Disorder, but frames them as involvement indicators rather than strict diagnostic criteria.

The seven key questions map onto various dimensions of problematic use, including craving (Question 3), social/functional impairment (Questions 4 and 5), and recognition of a problem (Questions 6 and 7). This structure allows for an assessment across a spectrum of use severity, from low-risk to dependence.

Validity

The validity of the ASSIST has been rigorously established through multi-site international studies coordinated by the WHO. Validation studies, such as those conducted by Humeniuk et al. (2008) and Newcombe et al. (2005), demonstrated strong concurrent validity when comparing ASSIST scores against reference standards, including the Composite International Diagnostic Interview (CIDI).

Specifically, the ASSIST has proven effective in discriminating between low-risk use, moderate-risk use (hazardous/harmful), and high-risk use (indicative of dependence). Its ability to accurately identify individuals who meet criteria for Substance Use Disorder across diverse cultural settings confirms its cross-cultural utility as a reliable screening tool.

Reliability

The reliability of the ASSIST has been confirmed through tests of internal consistency and test-retest reliability. Studies, including the original development paper (WHO ASSIST Working Group, 2002), reported high reliability coefficients, indicating that the scale consistently measures the underlying construct of substance involvement.

The test-retest results suggest that the scale provides stable scores, particularly concerning lifetime use and recent frequency, making it suitable for both initial screening and follow-up monitoring of intervention effectiveness.

Factor Analysis

Although the ASSIST is designed as a straightforward additive scale where scores for questions 2 through 7 are summed to create a Substance Involvement Score (SIS), factor analysis studies often support a single dominant factor representing overall Substance Involvement or severity of use for each specific substance category.

This unidimensional structure reinforces the scale’s primary role as a severity index used to triage patients into appropriate levels of care (e.g., low risk, moderate risk requiring brief intervention, or high risk requiring specialist treatment).

Instrument

Test Type: Screening and Risk Assessment Instrument

Format: Interviewer-administered questionnaire (or self-report in some settings); 8 questions (Q1-Q7, plus Q7 Injection Use) administered substance-by-substance.

Language Available: Widely translated into numerous languages globally due to WHO sponsorship (e.g., Spanish, Portuguese, French, Russian, Arabic, Chinese).

Population Group: General population seeking healthcare, particularly in primary care settings.

Age Group: Typically utilized with adolescents and adults (16 years and older).

Population Details: Designed for use in diverse cultural and clinical settings where early detection of Substance Use Disorder risk is critical.

Test Methodology: Structured interview format. Scoring results in a specific Substance Involvement Score (SIS) for each substance, which guides the subsequent clinical response (Brief Intervention, Motivational Interviewing, or Referral to Treatment). The original PDF guidelines are available here: http://www.who.int/substance_abuse/activities/en/Draft_The_ASSIST_Guidelines.pdf

Keywords

Brief Intervention, Screening, Addiction, Alcohol Use Disorder, Tobacco Use, Drug Abuse, Opioid Involvement, WHO ASSIST.

Authors

Author ORCID Identifier: Not uniformly available for the collective WHO ASSIST Working Group.

Affiliation Email addresses: Contact details for specific researchers involved in subsequent validation studies include Dr Nicolas Kambouropoulos ([email protected]), Associate Professor Petra Staiger ([email protected]), and Julia Nicholls ([email protected]).

Correspondence Address: World Health Organization (WHO), Department of Mental Health and Substance Abuse, Geneva, Switzerland.

Permissions & Fee and Test Year

The scale was developed by the World Health Organization ASSIST Working Group, with the V3.0 guidelines released in 2002. As a public health initiative, the ASSIST instrument and guidelines are generally available free of charge for clinical, research, and non-commercial purposes, promoting widespread use of this important screening tool.

Reference’s

• WHO ASSIST Working Group. (2002). The Alcohol, Smoking and Substance Involvement Screening Test (ASSIST): Development, reliability and feasibility. Addiction, 97(9), 1183-1194.

• Sue Henry-Edwards, Rachel Humeniuk, Robert Ali, Vladimir Poznyak and Maristela Monteiro. The Alcohol, Smoking and Substance Involvement Screening Test (ASSIST): Guidelines for Use in Primary Care (Draft Version 1.1 for Field Testing). Geneva, World Health Organization, 2003.

• Humeniuk, R., Ali, R., Babor, T. F., Farrell, M., Formigoni, M. L., Jittiwutikarn, J,…. Simon, S. (2008). Validation of the alcohol, smoking and substance involvement screening test (ASSIST). Addiction, 103(6), 1039-1047.

• Newcombe, D. A., Humeniuk, R. E., & Ali, R. (2005). Validation of the World Health Organization Alcohol, Smoking and Substance Involvement Screening Test (ASSIST): Report of results from the Australian site. Drug and Alcohol Review, 24(3), 217-226.

• Nicholls. J. D. (2013). The Role of Impulsivity in Co-occurring Social Anxiety and Substance Misuse. Deakin University. Doctor of Psychology thesis.

Items of the Alcohol‚ Smoking and Substance Involvement Screening Test (ASSIST)

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.