Hamilton anxiety scale
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Hamilton Anxiety Rating Scale HAM-A scoring official overview
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Hamilton Anxiety Rating Scale (HAM-A)
The Hamilton Anxiety Rating Scale, or HAM-A, is a clinician-rated instrument used to measure the severity of anxiety symptoms. It assesses both psychological and physical manifestations of anxiety and is commonly used to track symptom change during treatment, particularly in generalized anxiety disorder research.
Format and scoring
- 14 items, rated by a clinician
- Each item is scored 0 to 4:
- 0 = not present
- 1 = mild
- 2 = moderate
- 3 = severe
- 4 = very severe
- Total score: 0 to 56
- The assessment conventionally covers the previous week.
| Score | Common interpretation* |
|---|---|
| 0-7 | No or minimal anxiety |
| 8-14 | Mild anxiety |
| 15-23 | Moderate anxiety |
| 24 or higher | Severe anxiety |
*These ranges are commonly used, but cutoffs are not by themselves diagnostic. A score of 14 or higher has been suggested as clinically significant anxiety.
The 14 HAM-A domains
- Anxious mood
- Tension
- Fears
- Insomnia
- Intellectual symptoms, such as poor concentration or memory
- Depressed mood
- Somatic muscular symptoms, such as aches, tension, tremor
- Somatic sensory symptoms, such as tinnitus, blurred vision, tingling
- Cardiovascular symptoms, such as palpitations or chest pain
- Respiratory symptoms, such as breathlessness or choking sensation
- Gastrointestinal symptoms
- Genitourinary symptoms
- Autonomic symptoms, such as dry mouth, sweating, flushing, dizziness
- Behavior during the interview
Important limitations
- It is a severity rating scale, not a standalone diagnostic test for an anxiety disorder.
- It includes many somatic symptoms, so medical illness or medication effects can increase the score.
- It has limited assessment of the excessive, persistent “worry” central to DSM-5 generalized anxiety disorder, and does not fully capture episodic panic symptoms.
- It should ideally be administered by a trained clinician or with a structured interview guide, because its severity anchors are relatively nonspecific.
Kaplan and Sadock describe HAM-A as a 14-item, clinician-administered scale with scores from 0 to 56, useful for monitoring response but with limitations for modern diagnostic assessment of anxiety disorders. Kaplan & Sadock’s Comprehensive Textbook of Psychiatry, p. 3360. The NIH scale overview likewise identifies its 14-item structure and coverage of psychic and somatic anxiety.
Show me the complete HAM-A scoring guide
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Hamilton Anxiety Rating Scale HAM-A 14 items scoring guide 0 4 clinician form
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"Hamilton Anxiety Rating Scale" AND psychometrics
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Complete Hamilton Anxiety Rating Scale (HAM-A) scoring guide
Use: clinician-rated assessment of anxiety severity, usually considering the past week. Score each of the 14 items from 0 to 4, then add them.
| Rating | Meaning |
|---|---|
| 0 | None / not present |
| 1 | Mild |
| 2 | Moderate |
| 3 | Severe |
| 4 | Severe, grossly disabling |
Total score range: 0 to 56.
Items
| # | Domain | Assess for | Score 0-4 |
|---|---|---|---|
| 1 | Anxious mood | Worries, anticipation of the worst, fearful anticipation, irritability | ___ |
| 2 | Tension | Feeling tense, fatigue, exaggerated startle, tearfulness, trembling, restlessness, inability to relax | ___ |
| 3 | Fears | Fear of dark, strangers, being alone, animals, traffic, crowds | ___ |
| 4 | Insomnia | Difficulty falling asleep, broken or non-restorative sleep, fatigue on waking, dreams, nightmares, night terrors | ___ |
| 5 | Intellectual / cognitive symptoms | Difficulty concentrating, poor memory | ___ |
| 6 | Depressed mood | Loss of interest or pleasure, low mood, early waking, diurnal mood variation | ___ |
| 7 | Somatic muscular symptoms | Aches, pains, twitching, stiffness, myoclonic jerks, teeth grinding, unsteady voice, increased muscle tone | ___ |
| 8 | Somatic sensory symptoms | Tinnitus, blurred vision, hot or cold flushes, weakness, tingling or prickling sensations | ___ |
| 9 | Cardiovascular symptoms | Tachycardia, palpitations, chest pain, throbbing vessels, faint feelings, skipped beats | ___ |
| 10 | Respiratory symptoms | Chest pressure or tightness, choking sensation, sighing, dyspnea / shortness of breath | ___ |
| 11 | Gastrointestinal symptoms | Dysphagia, gas, abdominal pain or burning, fullness, nausea, vomiting, bowel noises, loose stools, weight loss, constipation | ___ |
| 12 | Genitourinary symptoms | Frequency or urgency of urination, menstrual symptoms, reduced libido, sexual dysfunction, premature ejaculation | ___ |
| 13 | Autonomic symptoms | Dry mouth, flushing, pallor, sweating, dizziness, tension headache, piloerection | ___ |
| 14 | Behavior during interview | Fidgeting, pacing, hand tremor, furrowed brow, strained face, sighing or rapid breathing, pallor, swallowing, belching, brisk reflexes, dilated pupils, exophthalmos | ___ |
Total HAM-A score: ____ / 56
Common interpretation of total score
| Total | Interpretation |
|---|---|
| 0-7 | No or minimal anxiety |
| 8-14 | Mild anxiety |
| 15-23 | Moderate anxiety |
| 24-56 | Severe anxiety |
Alternative research conventions sometimes use: <17 mild, 18-24 mild to moderate, 25-30 moderate to severe, and >30 severe. Use the same convention consistently when following a patient over time.
Optional component scores
- Psychic anxiety: Items 1-6
- Somatic anxiety: Items 7-13
- Item 14 is the clinician’s observed behavior and is included in the total score, but is not typically placed in either component subscore.
Interpretation cautions
HAM-A measures symptom severity, not a diagnosis. Physical symptoms may result from anxiety, medical illness, medications, or substance effects. The scale has no detailed item-by-item severity anchors, so trained clinician administration is preferred. It also does not fully assess persistent pathological worry in generalized anxiety disorder or the episodic nature of panic.
The scale’s 14-item, 0-4 structure and its distinction between psychic and somatic anxiety are described in the NIH HAM-A record. Kaplan and Sadock note that a total score of 14 has been suggested as a threshold for clinically significant anxiety, while emphasizing its limits as a diagnostic measure. Kaplan & Sadock’s Comprehensive Textbook of Psychiatry, p. 3360.
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