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Category Medicine & Tests

C Have you ever felt you should Cut down on your drinking?

A Have people Annoyed you by criticizing your drinking?

G Have you ever felt bad or Guilty about your drinking?

E Have you ever had a drink first thing in the morning (Eye-opener) to steady your nerves or get rid of a hangover?

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About

The CAGE questionnaire is a 4-item clinical screening instrument developed by Ewing in 1984 to detect alcohol use disorders. Each affirmative response scores 1 point. A total score ≥ 2 is considered clinically significant, with reported sensitivity of 93% and specificity of 76% in primary care populations. Misinterpretation of results carries real clinical risk: false negatives delay intervention for patients with progressing alcohol dependence, while false positives may trigger unnecessary referrals. This calculator applies the standard summation scoring with stratified risk interpretation aligned to published validation data.

The acronym derives from the four probe domains: Cut down, Annoyed, Guilty, Eye-opener. The tool is intended for preliminary screening only and does not constitute a diagnosis. Clinicians typically follow a positive CAGE screen with the AUDIT (10-item) instrument or structured clinical interview per DSM-5 criteria. Note: the CAGE has reduced sensitivity in populations with lower prevalence of alcohol dependence, including adolescents and elderly patients.

Formulas

The CAGE score is computed as the arithmetic sum of affirmative responses across all 4 items:

S = 4∑i=1 q_i

where S = total CAGE score (0 - 4), q_i ∈ {0, 1} = response to question i (1 = Yes, 0 = No).

Clinical decision rule:

{

Low Risk if S = 0At-Risk if S = 1Clinically Significant if S ≥ 2

The cutoff of S ≥ 2 was established by Ewing (1984) and validated across multiple populations. Positive predictive value varies with prevalence: in populations with 10% alcohol dependence prevalence, PPV ≈ 29%; at 30% prevalence, PPV rises to ≈ 67%.

Reference Data

Score	Risk Level	Sensitivity Range	Recommended Action	Population Notes
0	Low Risk	-	No further screening indicated	General population baseline
1	At-Risk	60 - 70%	Brief counseling; consider AUDIT follow-up	May indicate hazardous drinking pattern
2	High Risk (Clinically Significant)	74 - 93%	Full AUDIT assessment; clinical interview	Standard clinical cutoff (Ewing, 1984)
3	High Risk	85 - 95%	Referral to addiction specialist	Strong indicator of dependence
4	Very High Risk	95 - 99%	Urgent clinical evaluation; possible detox referral	Near-certain alcohol dependence
Comparison with Other Screening Tools
Tool	Items	Sensitivity	Specificity	Best Use Case
CAGE	4	71 - 93%	70 - 97%	Primary care rapid screen
AUDIT	10	51 - 97%	78 - 96%	Comprehensive screening; graded severity
AUDIT-C	3	73 - 86%	72 - 91%	Consumption-focused brief screen
MAST	25	91 - 98%	74 - 87%	Research; forensic settings
T-ACE	4	69 - 88%	71 - 89%	Prenatal screening
TWEAK	5	71 - 91%	73 - 83%	Prenatal screening (alternative)
FAST	4	91%	93%	Emergency department triage
SASQ	1	73 - 86%	67 - 85%	Ultra-brief primary care prescreen

Frequently Asked Questions

A score of 1 falls below the standard clinical cutoff of 2 but is not benign. It indicates the patient has endorsed one domain of problematic drinking behavior. Current guidelines recommend brief alcohol counseling and consideration of a follow-up AUDIT assessment, particularly if the endorsed item is the Eye-opener question, which correlates more strongly with physiological dependence.

The CAGE was validated primarily in adult male primary care and psychiatric inpatient populations. Its sensitivity drops to approximately 50 - 60% in women, elderly patients, and college-age individuals because the questions target consequences of chronic heavy drinking rather than hazardous consumption patterns. For prenatal screening, the T-ACE or TWEAK instruments are preferred. For adolescents, the CRAFFT screening tool is the standard.

No. The CAGE was designed to identify alcohol dependence, not episodic heavy drinking. A patient who binge drinks on weekends but has not experienced guilt, annoyance at criticism, morning drinking, or desire to cut down may score 0. The AUDIT instrument, particularly questions 1 - 3 (the AUDIT-C), is better suited for detecting hazardous consumption patterns below the threshold of dependence.

The Eye-opener item (E) specifically probes for physiological dependence - morning drinking to relieve withdrawal symptoms such as tremor, nausea, or anxiety. The other three items (C, A, G) assess psychosocial consequences. An affirmative Eye-opener response alone carries a positive likelihood ratio of approximately 4.5 for alcohol dependence, making it the single most discriminating item in the questionnaire.

No. The CAGE is a screening instrument, not a diagnostic tool. A positive screen (score ≥ 2) should trigger further evaluation using a structured clinical interview based on DSM-5 Alcohol Use Disorder criteria or a comprehensive instrument such as the full 10-item AUDIT. Diagnosis requires assessment of tolerance, withdrawal, consumption quantity, failed attempts to reduce, and functional impairment - none of which the CAGE directly measures.

The CAGE-AID (Adapted to Include Drugs) modifies each question to include drug use alongside alcohol. For example, the Cut down question becomes: "Have you ever felt you ought to cut down on your drinking or drug use?" This broadens the instrument to screen for any substance use disorder. Scoring and cutoff remain identical: a score ≥ 2 is clinically significant. The CAGE-AID is preferred in settings where polysubstance use is prevalent.