ApplicationTo recognize depression, self-rating scales may be useful among patient groups with an increased risk of depression. These scales are valuable for identifying patients, evaluating the outcome of treatment and the course of depression. Self-rating scales are also independent of the doctor or patient, so the result is greater patient ligation than a clinical assessment. If the self-position scale indicates that the patient suffers from depression, the diagnosis must then be confirmed by a doctor. The PHQ-9 (Patient Health Questionnaire) self-position scale is extracted from the DSM-IV criteria for depression. Previous studies have demonstrated that PHQ-9s are valuable as tools for identifying cases with a severity position that allows care providers to oversee treatment outcome. These self-positioning scales are recommended for use in Primary Care. The Patient Health Questionnaire (PHQ) is designed to facilitate the recognition and diagnosis of depressive disorders in primary care patients. For patients with a depressive disorder, a PHQ Depression Severity Index result can be calculated and repeated when supervising change. Primary care is most often patients' first contact with medical care. The elegant primary duty to serve as the premier prevention, diagnosis, treatment, cure and rehabilitation platform for all diseases across all age categories. This also includes depression, and patients with mild to moderate depression can most often be managed fully in primary care. The PHQ-9 is therefore a dual-use instrument that, with the same… half of the paper… and health care utilization on college campuses: Results from a national sample of college students. Department of Psychology, Eastern Michigan University. Kroenke K., Robert L. & Spitzer, MD. (2002). The Phq -9: a new diagnostic and severity measure of depression. Psychiatric Annals 3 2: 9.Kroenke, K., Spitzer, R.L., Williams, J.B. (2001). The PHQ-9. Validity of a measure of severity of brief depression. Journal of General Internal Medicine, 16, 606-613. Spitzer, R. L., Kroenke, K., & Williams, J. B. W. (1999). Validation and usefulness of a self-report version of PRIME-MD; The PHQ Primary Care Study. Journal of the American Medical Association, 282, 1737-1744. Martin, A., Rief, W., Klaiberg, A., Braehler, E. (2006). Validity of the Brief Patient Health Questionnaire Mood Scale (PHQ-9) in the general population. General Hospital Psychiatry, 28, 71-77.