Validity of the Depression-Arkansas (D-ARK) Scale: a tool for measuring major depressive disorder.

The results of 2 validation studies for an assessment tool designed specifically for quality improvement and outcomes assessment efforts in mental healthcare are presented in this paper. The studies evaluated a new tool to assess the patient outcomes for major depressive disorder following treatment in routine clinical settings called the Depression-Arkansas Scale (D-ARK). Study 1 included 54 patients recruited from 3 hospital-based clinics (2 mental health clinics and 1 primary care clinic). Study 2 includes 827 patients from 5 clinical settings including a university based outpatient clinic, a VA based mental health clinic, and a managed-care program. These 2 very different studies provide preliminary evidence that the D-ARK may be a useful tool for quality improvement efforts in the mental healthcare setting. Specifically, they indicate that the D-ARK has strong validity when compared to 2 different research assessments, the Structured Clinical Interview for DSM-III-R, Patient Edition (SCID-P) and the Inventory to Diagnose Depression (IDD), and compared to clinical assessments using both the clinical diagnosis and a clinician checklist.