Screening instruments for depression in primary care: a concise review for clinicians

Depression is prevalent across the life span worldwide. It is a common problem encountered in primary care settings. The World Health Organization recommends the integration of mental health into general health care in order to seal the existing gap between the number of patients who need mental health care and those who actually receive it. Addressing the burden of mental health problems in primary care settings has its limitations, particularly because of the time constraints in busy primary care clinics as well as the inadequate training of staff and physicians in mental health disorders. That is why reliable, brief, and easy to administer depression screening instruments are important in helping physicians identify patients at risk. The 2-item Patient Health Questionnaire (PHQ-2) is a suitable primary screening tool for depression. If positive, other tools should be administered, such as the PHQ-9 in adults, the PHQ-9 or Geriatric Depression Scale-15 in older adults, or the Arroll's help question or the Edinburgh Postnatal Depression Scale in ante- or postpartum women. Patients with positive scores ought to be interviewed more thoroughly. Computerized depression screening instruments that are interfaced or integrated into electronic health records seem to be promising steps toward optimizing diagnosis, treatment, and follow-up. The availability of adequate management and follow-up are ethical requirements for the utilization of any screening instrument for depression.