What is the appropriate approach to taking a medical history from a patient with alcohol use disorder?

How to Take a History in an Alcoholic Patient

Use validated screening questionnaires systematically—specifically AUDIT or AUDIT-C—to quantify alcohol consumption, assess for alcohol use disorder (AUD), and document drinking patterns, as these tools are more reliable than unstructured clinical interviews alone. 1, 2

Structured Approach to Alcohol History-Taking

Step 1: Universal Screening with Validated Tools

Begin with a structured screening instrument rather than relying solely on traditional open-ended questions, as patients commonly underreport alcohol intake and physicians frequently miss alcohol-related problems 3.

Primary screening options (choose based on time constraints):

• AUDIT (Alcohol Use Disorders Identification Test): The gold standard 10-item questionnaire that assesses consumption (questions 1-3), dependence (questions 4-6), and harmful drinking (questions 7-10). Score ≥8 indicates harmful or hazardous drinking 1, 2

• AUDIT-C (shortened version): Uses only the first 3 AUDIT questions about consumption. Positive if score >4 in men or >3 in women. Maintains high sensitivity/specificity while saving time 1

• NIAAA Single Alcohol Screening Question (SASQ): "How many times in the past year have you had 5 or more drinks (men) or 4 or more drinks (women) in a day?" One or more times warrants follow-up 1

• CAGE questionnaire: 4 simple yes/no questions (Cut down, Annoyed, Guilty, Eye-opener). Score ≥2 is clinically significant. Sensitivity 71%, specificity 90% 3

Step 2: Quantify Alcohol Consumption Precisely

Document specific quantities using standardized definitions 1, 4:

• Frequency: How often do you drink? (daily, weekly, monthly)
• Quantity per occasion: How many standard drinks on a typical drinking day?
  • Define standard drink: 14g pure alcohol = 12 oz beer, 5 oz wine, 1.5 oz spirits
• Binge drinking patterns:
  • Men: ≥5 drinks within 2 hours
  • Women: ≥4 drinks within 2 hours
• Heavy drinking thresholds:
  • Men: >15 drinks/week or >210g/week
  • Women: >8 drinks/week or >112g/week

Use Timeline Followback (TLFB) or Lifetime Drinking History for detailed retrospective assessment, tracking phases of drinking from onset to current patterns 1.

Step 3: Assess for Alcohol Use Disorder Using DSM-V Criteria

Screen for AUD by asking about these 11 criteria over the past 12 months 2:

1. Drinking more or longer than intended
2. Persistent desire or unsuccessful efforts to cut down
3. Significant time spent obtaining, using, or recovering from alcohol
4. Craving or strong urge to drink
5. Failure to fulfill major obligations (work, school, home)
6. Continued use despite social/interpersonal problems
7. Giving up important activities due to alcohol
8. Recurrent use in physically hazardous situations
9. Continued use despite physical/psychological problems
10. Tolerance (need more to achieve effect)
11. Withdrawal symptoms

Severity grading: 2-3 criteria = mild AUD; 4-5 = moderate AUD; ≥6 = severe AUD 2

Step 4: Obtain Collateral Information

Critical pitfall: Denial and underreporting are extremely common 3.

• Obtain information from family members when possible
• Look for indirect evidence: frequent falls, lacerations, burns, fractures, emergency department visits 3
• Review prior medical records for inconsistencies in reported alcohol use 5

Step 5: Document Comprehensively

Essential documentation elements 4, 5:

• Specific screening tool used and score
• Quantity in grams/week and drinks/week
• Pattern (daily vs. binge vs. episodic)
• Duration of heavy drinking
• Previous quit attempts and withdrawal symptoms
• Social/occupational consequences
• Medical complications (liver disease, pancreatitis, neuropathy)

Step 6: Consider Alcohol Biomarkers

When history is unreliable or to monitor treatment 1:

• Phosphatidylethanol (PEth): Detects alcohol use over 2-4 weeks
• Ethyl glucuronide (EtG): Detects use up to 3 days in blood/urine
• Traditional markers (GGT, AST, ALT, MCV) are less sensitive but may support clinical suspicion 3

Common Pitfalls to Avoid

1. Relying on unstructured questions alone: Studies show only 14% of referrals had informative alcohol histories when structured tools weren't used 5

2. Accepting initial denial: Four patients in one study had substantially different histories when re-interviewed with structured tools 5

3. Inadequate follow-up documentation: Only 56% of follow-up visits had informative alcohol documentation compared to 90% at initial consultation 5

4. Missing the "gray zone": Patients drinking 20-60g/day have 5-35% probability of alcohol dependence—don't dismiss moderate consumption 1

5. Failing to screen in appropriate settings: Screen universally in primary care, emergency departments, and all patients with liver disease 2

Special Populations

Pregnant women: Use T-ACE or TWEAK screening tools designed to detect lower consumption levels that pose fetal risks. Advise complete abstinence as no safe level is established 6

Patients with liver disease: Systematic screening is essential as alcohol is a primary/comorbid cause of liver injury, yet hazardous use is rarely documented in referrals 5