Short Michigan Alcoholism Screening Test (SMAST)

Why use it

Alcohol use disorder is a major public health problem affecting approximately 14% of adults in the USA and is frequently underdiagnosed in primary care and hospital settings. The SMAST provides a validated, brief, self-administered screen that requires no equipment and can be completed in 3–5 minutes. It offers more detail than the 4-item CAGE while being shorter than the 10-item AUDIT. The SMAST is particularly useful for: initial screening in outpatient settings; identifying patients who require fuller AUDIT assessment or structured addiction interview; follow-up screening in at-risk populations; and documenting alcohol screening in quality improvement initiatives.

About

The Short Michigan Alcoholism Screening Test (SMAST) is a validated 13-item self-report or clinician-administered screening instrument for alcohol use disorder (AUD), developed by Selzer, Vinokur, and van Rooijen as a shortened version of the original 25-item Michigan Alcoholism Screening Test (MAST), and published in the Journal of Studies on Alcohol in 1975. The MAST was originally developed by Selzer in 1971 and validated as one of the first standardized alcohol disorder screening tools. The SMAST retains the highest-discriminating items from the MAST and covers five key domains of alcohol-related problems: social and family consequences of drinking, self-perception of drinking behavior, alcohol-related medical and psychiatric sequelae, legal consequences, and help-seeking behaviors. Each item is scored dichotomously (0 or 1 point), with certain items scored for "Yes" responses and others for "No" responses (reflecting normal behavior). The total score ranges from 0 to 13. A score of 0–1 indicates no apparent alcohol problem; a score of 2 indicates possible alcohol problem; and a score ≥3 indicates probable alcohol abuse or dependence (now termed alcohol use disorder per DSM-5). The SMAST has demonstrated sensitivity of approximately 70–85% and specificity of 75–90% for AUD across multiple validation studies. While the CAGE questionnaire (4 items) and AUDIT (10 items) are also widely used, the SMAST remains valuable for its moderate brevity, self-report capability, and validation across multiple clinical settings.

When to use

• Initial alcohol screening in primary care, internal medicine, or psychiatry outpatient settings
• Emergency department patients presenting with intoxication, withdrawal, trauma, or alcohol-related medical complications
• Preoperative assessment where alcohol use may affect anesthesia and recovery
• Patients with liver disease, pancreatitis, hypertension, or other conditions associated with heavy alcohol use
• Referral assessment before initiating pharmacotherapy for AUD (naltrexone, acamprosate, disulfiram)
• Follow-up screening in patients with known or suspected AUD to assess change over time
• As part of a comprehensive addiction assessment alongside AUDIT-C, CIWA-Ar, and clinical interview

Formula

Pearls & pitfalls

• Items 1 and 4 are reverse-scored: answering "No" to "Do you feel you are a normal drinker?" or "Do friends/relatives think you are a normal drinker?" earns 1 point each.
• A SMAST score ≥3 identifies probable AUD with sensitivity ~70–85% and specificity ~75–90% — it is a SCREENING tool, not diagnostic. A positive screen should trigger full clinical assessment.
• The SMAST, like all self-report alcohol screens, is subject to social desirability bias — patients may underreport alcohol problems in clinical settings. Corroborate with collateral history, laboratory markers (GGT, CDT, MCV, AST/ALT ratio), and clinical observation.
• The CAGE questionnaire (4 items) has comparable sensitivity for severe AUD but lower sensitivity for mild-to-moderate AUD — SMAST captures a broader severity spectrum.
• The AUDIT (10 items, WHO) is the gold standard for alcohol screening and measures quantity, frequency, and dependence — consider AUDIT as first-line if time allows; SMAST is appropriate for rapid initial screening.
• SMAST scoring distinguishes "Yes" and "No" answers that each indicate alcohol problems — clinicians must follow the specific scoring key rather than assuming "Yes" always scores positively.
• In hospitalized patients, the SMAST can help identify AUD for alcohol withdrawal risk stratification — patients who score ≥3 should be assessed for alcohol dependence and withdrawal risk (CIWA-Ar initiation).
• The SMAST does not assess current quantity/frequency of drinking — a patient who has been sober for years with a significant alcohol history may score high. Clarify the time frame with the patient.
• Gender differences: women with AUD may score lower than men on some SMAST items due to differential social consequences — AUDIT is generally preferred for gender-sensitive screening.

Next steps

SMAST 0–1 (No apparent problem): Alcohol problem is unlikely. Provide brief anticipatory guidance on responsible drinking. No further intervention required. SMAST 2 (Possible problem): Possible alcohol use disorder. Administer full AUDIT-10 for more detailed assessment. Brief motivational intervention. Reassess at next visit. SMAST ≥3 (Probable alcohol use disorder): Probable alcohol use disorder. Full clinical evaluation including AUDIT, quantity-frequency assessment, and CAGE. Consider CIWA-Ar assessment if withdrawal risk is possible. Offer brief counseling. Refer to addiction medicine or specialist alcohol treatment service. Consider pharmacotherapy (naltrexone, acamprosate, or disulfiram) in appropriate candidates. Screen for comorbid depression and anxiety (common in AUD).

Evidence

Selzer ML. The Michigan Alcoholism Screening Test: the quest for a new diagnostic instrument. Am J Psychiatry. 1971;127(12):1653-1658. PMID:5565851. Selzer ML, Vinokur A, van Rooijen L. A self-administered Short Michigan Alcoholism Screening Test (SMAST). J Stud Alcohol. 1975;36(1):117-126. PMID:1235963. Validation: sensitivity 70–85%, specificity 75–90% for DSM-IV alcohol use disorder. Comparison with CAGE: SMAST has higher sensitivity for mild-moderate AUD. Comparison with AUDIT: AUDIT more sensitive for hazardous drinking below dependence threshold. Moran MB et al. Alcohol screening in primary care: a comparison of SMAST, CAGE, and AUDIT. J Clin Psychol Med Settings. 2009.

References

1. Selzer ML, Vinokur A, van Rooijen L. A self-administered Short Michigan Alcoholism Screening Test (SMAST). J Stud Alcohol. 1975;36(1):117-126. — link
2. Selzer ML. The Michigan Alcoholism Screening Test: the quest for a new diagnostic instrument. Am J Psychiatry. 1971;127(12):1653-1658. — link
3. Babor TF et al. AUDIT: The Alcohol Use Disorders Identification Test. Guidelines for use in primary care. 2nd ed. World Health Organization; 2001. — link
4. Saunders JB et al. Development of the Alcohol Use Disorders Identification Test (AUDIT): WHO Collaborative Project on Early Detection of Persons with Harmful Alcohol Consumption. Addiction. 1993;88(6):791-804. — link