Using screening tools to identify the risk or presence of depression in older people.

Depression is a common mood disorder affecting at least 20% of older people and has been predicted to become one of the world's most disabling illnesses. Perhaps due to its wide range of signs and symptoms, the condition remains notoriously complex to diagnose. Management is typically inadequate and prognosis is bleak. This article examines the use of screening tools for mild depression in those over 65 in primary care, to help determine whether screening would aid recognition and improve patient outcomes.