Health Dynamics Inventory

The Health Dynamics Inventory (HDI) is a 50 item self-report questionnaire developed to evaluate mental health functioning and change over time and treatment. The HDI was written to evaluate the three aspects of mental disorders as described in the Diagnostic and Statistical Manual of Mental Disorders (DSM): "clinically significant behavioral or psychological syndrome or pattern...associated with present distress...or disability". This also corresponds to the phase model described by Howard and colleagues Accordingly, the HDI assesses (1) the experience of emotional or behavioral symptoms that define mental illness, such as dysphoria, worry, angry outbursts, low self-esteem, or excessive drinking, (2) the level of emotional distress related to these symptoms, and (3) the impairment or problems fulfilling the major roles of one's life.

The HDI was developed for use with mental and behavioral health outpatient, day treatment, hospital, and chemical health programs for both children and adults. It has multiple applications for improving the mental health treatment of children and adults, including in primary care medicine and integrated care. It was designed to be responsive to treatment effects and has descriptive anchors on a 5 point scale to allow for discrimination of frequency and severity of symptom expression.

The HDI was developed for ease of use for patients, researchers, clinicians, and clinics. It was designed to be easy to administer and to score, easy to complete, and to provide results that are easily understood and transformed into meaningful decisions, diagnoses and treatment plans. Most importantly, the HDI was designed to allow clear comparison between multiple administrations, demonstrating the degree of effectiveness of the services provided to individuals throughout their treatment, and to other changes of condition. This allows clinicians and patients to recognize their successes and failures, alert clinicians to high risk situations, target and modify treatment as necessary, and for clinics and clinic managers to track and monitor the process and progress of persons under their care.

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