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PAWSS (Prediction of Alcohol Withdrawal Severity Scale)

PAWSS predicts complicated alcohol withdrawal (seizures, delirium tremens) in hospitalised patients. If the patient drank in the last 30 days or has a positive blood alcohol, score 10 items (0–10); a score ≥4 indicates high risk (sensitivity 93%, specificity 99.5% in the 2015 validation).

  • Any alcohol consumption in the last 30 days, OR positive blood alcohol on admission (yes/no)
  • Been intoxicated/drunk within the last 30 days (yes/no, +1)
  • Ever undergone alcohol use disorder rehabilitation or treatment for alcoholism (yes/no, +1)
  • Ever experienced previous episodes of alcohol withdrawal, regardless of severity (yes/no, +1)
  • Ever experienced blackouts (yes/no, +1)
  • Ever experienced alcohol withdrawal seizures (yes/no, +1)
  • Ever experienced alcohol withdrawal delirium (DTs) (yes/no, +1)
  • Combined alcohol with "downers" (benzodiazepines, barbiturates) in the last 90 days (yes/no, +1)
  • Combined alcohol with any other substance of abuse in the last 90 days (yes/no, +1)
  • Blood alcohol level >200 mg/dL on presentation (yes/no, +1)
  • Evidence of increased autonomic activity (HR >120, tremor, sweating, agitation, nausea) (yes/no, +1)
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Interpretation

ResultMeaning
Threshold not metNot applicable / low risk
0–3Low risk of complicated AWS
≥ 4High risk of complicated AWS

Formula

Threshold: any alcohol in last 30 days or positive BAL on admission (if no, stop). Then 1 point each: intoxicated in last 30 days; prior AUD rehab/treatment; prior withdrawal; prior blackouts; prior withdrawal seizures; prior DTs; alcohol + benzodiazepines/barbiturates in last 90 days; alcohol + other substance in last 90 days; BAL >200 mg/dL on presentation; increased autonomic activity (HR >120, tremor, sweating, agitation, nausea). Range 0–10.

Clinical pearls

  • Validated in medically ill hospitalised patients, not in the ED or outpatients; it predicts risk, it does not grade current withdrawal (use CIWA-Ar for that).
  • Score as soon as possible after admission; the blood alcohol item uses the level on presentation (200 mg/dL ≈ 43 mmol/L).
  • Patients who cannot answer (intubated, delirious) can be scored from collateral history and records.

Examples

FAQ

What PAWSS score is high risk?

A PAWSS of 4 or more indicates high risk of complicated alcohol withdrawal (seizures or delirium tremens).

What is the difference between PAWSS and CIWA-Ar?

PAWSS predicts who is at risk of severe withdrawal before it happens; CIWA-Ar measures the severity of withdrawal that is already occurring to guide symptom-triggered treatment.

Evidence

  1. Maldonado JR et al. The "Prediction of Alcohol Withdrawal Severity Scale" (PAWSS): systematic literature review and pilot study. Alcohol 2014;48:375–90.
  2. Maldonado JR et al. Prospective validation study of the PAWSS in medically ill inpatients. Alcohol Alcohol 2015;50:509–18.

Psychiatry & Substance Use · Reviewed 2026-10-14 · Methodology