Hamilton Anxiety Rating Scale

The Hamilton Anxiety Rating Scale (HAM-A), developed by Max Hamilton in 1959, is one of the most established and widely used observer-rated instruments for…

Questions: 14
Duration: 20 min
Original title: HAM-A — Hamilton Anxiety Rating Scale
Adaptation: Hamilton Anxiety Rating Scale
Authors: Hamilton, M.
Created: 1959

The Hamilton Anxiety Rating Scale (HAM-A), developed by Max Hamilton in 1959, is one of the most established and widely used observer-rated instruments for quantifying anxiety severity. Rather than providing a diagnostic label, this structured measure allows mental health professionals to map the exact profile and intensity of a patient's anxious distress, which often serves as a strong foundation for a cognitive case formulation. It covers both the psychological features of anxiety, such as apprehension and cognitive tension, and the diverse physiological manifestations that often accompany it.

Administered through a semi-structured interview, the HAM-A relies on the clinician's expertise to weigh the frequency, severity, and functional impact of each symptom cluster. This makes it an invaluable tool for establishing a baseline during an initial intake, especially when exploring CBT maintaining processes that keep the anxiety active. By distinguishing between psychic and somatic anxiety, the measure helps tailor interventions and provides a highly reliable metric for monitoring symptom reduction over the course of treatment.

Example result

Fictitious result, computed from a sample set of answers.

Overall score

26/ 56

The HAM-A is a clinician-administered rating scale, scored following a semi-structured interview, used to assess the severity of anxiety symptoms in adults. It comprises 14 items evaluating psychic anxiety (anxious mood, tension, fears, insomnia, cognitive symptoms, depressed mood, behavior at interview) and somatic anxiety (muscular, sensory, cardiovascular, respiratory, gastrointestinal, genitourinary, autonomic). It is widely utilized in clinical practice and research, particularly to assess the efficacy of therapeutic and pharmacological interventions.

0–7

Absent or minimal anxiety

8–14

Mild anxiety

15–23

Moderate anxiety

24–56

Severe anxiety

Level typically found in patients enrolled in generalized anxiety disorder trials.

Scoring

Sum (total score and psychic/somatic subscale scores), total score ranging from 0 to 56, each item rated on a 5-point scale (from 0 to 4).

Psychic anxiety

13/ 28

Psychological component of anxiety: tension, worry, fears, mood, and behavior.

items 1, 2, 3, 4, 5, 6, 14

028

Somatic anxiety

13/ 28

Physical manifestations of anxiety: muscle tension, sensory, cardiovascular, respiratory, gastrointestinal, genitourinary, and autonomic symptoms.

items 7, 8, 9, 10, 11, 12, 13

028

Have your patient take this test

Assign it in one click: your patient answers on their phone, you receive the score and its interpretation.

Assign this test to a patient

What the test measures

The HAM-A provides a comprehensive evaluation of anxiety by breaking it down into 14 distinct symptom clusters, capturing both the subjective experience and the physical toll of anxiety.

Psychic anxiety: Captures mental agitation, including anxious mood, generalized fears, tension, cognitive difficulties, and depressed mood, which often require challenging negative thoughts in therapy.
Somatic anxiety: Covers physical manifestations across multiple systems, including muscular tension, sensory disturbances, and cardiovascular, respiratory, gastrointestinal, and genitourinary symptoms.
Autonomic arousal: Identifies physiological signs of a sensitized nervous system, such as sweating, flushing, and dry mouth.
Observable behavior: Integrates the clinician's direct observation of the patient's restlessness, facial expressions, and physical tension during the consultation.

This scale is specifically designed for adults and is particularly relevant for individuals presenting with symptoms of generalized anxiety disorder or those who need help distinguishing between adaptive vs maladaptive coping.

When and why to use it

Clinicians typically integrate the HAM-A into their practice to objectify the severity of anxious distress and track changes systematically.

Intake baseline: To map out the specific cognitive and physiological profile of the patient's anxiety at the start of therapy, informing the broader longitudinal case formulation.
Monitoring change: To evaluate the effectiveness of psychological or pharmacological interventions by tracking score reductions over time alongside between-session anxiety self-monitoring.
Symptom differentiation: To distinguish whether the patient's presentation is predominantly driven by mental apprehension or somatic hyperarousal, helping orient the treatment plan.
Clinical severity thresholding: To compare the patient's current distress against established clinical cut-offs for mild, moderate, or severe anxiety.

Using a validated clinician-rated score provides a much sharper picture than self-reporting alone, as it filters the patient's subjective experience through clinical observation.

Clinical library

750+ clinical tools

A library built with and for clinicians, ready to use in session and extend between appointments.

Access all the tools

Several resource types

Psychoeducation handouts

Understand at a glance

Interactive exercises

To do and fill in

Interactive programs

A structured path

Audios

Meditation and relaxation

Psychometric tests

Automatic scoring

The questions

To be completed by the clinician following a semi-structured interview. For each of the 14 items, rate the overall intensity of the symptom over the recent period (usually the past week) on a scale from 0 (not present) to 4 (very severe / incapacitating), taking into account frequency, intensity, and functional impact.
1. Anxious mood: worries, expecting the worst, anxious apprehension (fearful anticipation), irritability.
This item evaluates the patient's subjective experience of worry and fearful anticipation.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
2. Tension: feelings of tension, fatigue, startled responses, easily brought to tears, trembling, feeling restless, inability to relax.
This item addresses the physical and emotional manifestations of being on edge and unable to relax.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
3. Fears: of the dark, of strangers, of being left alone, of animals, of traffic, of crowds.
This item assesses the presence and intensity of specific phobic responses.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
4. Insomnia: difficulty falling asleep, interrupted sleep, unsatisfying sleep with fatigue upon waking, distressing dreams, nightmares, night terrors.
This item probes disruptions in the patient's sleep architecture and the overall quality of rest.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
5. Intellectual (cognitive) functions: difficulty concentrating, poor memory.
This item covers the cognitive impact of anxiety, particularly regarding attention and recall.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
6. Depressed mood: loss of interest, lack of pleasure in hobbies, depression, early waking, mood swings during the day.
This item screens for concurrent depressive symptoms, loss of pleasure, and mood fluctuations.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
7. Somatic muscular symptoms: aches and pains, muscle twitching, stiffness, myoclonic jerks, teeth grinding, unsteady voice, increased muscle tone.
This item evaluates physical tension and pain localized in the musculoskeletal system.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
8. Somatic sensory symptoms: ringing in the ears (tinnitus), blurred vision, hot or cold flashes, feelings of weakness, tingling sensations.
This item examines sensory disturbances often associated with heightened physiological arousal.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
9. Cardiovascular symptoms: tachycardia (fast heart rate), palpitations, chest pain, throbbing of vessels, fainting sensations, extrasystoles (skipped heartbeats).
This item focuses on heart-related autonomic symptoms and vascular sensations.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
10. Respiratory symptoms: heaviness in the chest or feelings of constriction, choking sensations, sighing, dyspnea (shortness of breath).
This item captures breathing difficulties and subjective feelings of chest constriction.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
11. Gastrointestinal symptoms: difficulty swallowing, swallowing air, indigestion, pain before or after meals, burning sensations, abdominal bloating, nausea, vomiting, gurgling, diarrhea, weight loss, constipation.
This item covers digestive distress and autonomic effects on the stomach and bowels.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
12. Genitourinary symptoms: frequent or urgent urination, amenorrhea (absence of menstruation), menorrhagia (heavy menstrual bleeding), development of frigidity, premature ejaculation, lack of erection, impotence.
This item assesses anxiety-induced disruptions to the urinary tract and sexual functioning.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
13. Autonomic nervous system symptoms: dry mouth, flushing, pallor, tendency to sweat, dizziness, tension headaches, piloerection (goosebumps).
This item groups together general signs of autonomic nervous system hyperarousal.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating
14. Behavior during the interview: tense, ill-at-ease, nervous hand movements (fidgeting, clenching fists), trembling, furrowed brow, tense face, sighing or rapid breathing, facial pallor, swallowing, belching, brisk tendon reflexes, dilated pupils, bulging eyes, sweating, eyelid twitching.
This item is based entirely on the clinician's direct observation of the patient's nonverbal communication and physical state during the assessment.
- Absent
- Mild
- Moderate
- Severe
- Very severe / incapacitating