HAM-A (Hamilton Anxiety Scale)
This widely used interview scale measures the severity of a patient's anxiety, based on 14 parameters, including anxious mood, tension, fears, insomnia, somatic complaints and behavior at the interview. Developed by M.Hamilton in 1959, the scale predates, of course, the current definition of generalized anxiety disorder (GAD). However, it covers many of the features of GAD and can be helpful also in assessing its severity.
The major value of HAM-A is to document the results of pharmaco- or psychotherapy, rather than as a diagnostic or screening tool.
It takes 15-20 minutes to complete the interview and scoring. Each item is simply given a 5-point score - 0 (not present) to 4 (severe).
• Download HAM-A Form (PDF)
• Download HAM-A Instructions (PDF)