EFFECTS OF DEPRESSION ON SOCIETY.

Key facts

• Depression is a common mental disorder. Globally, more than 264 million people of all ages suffer from depression.
• Depression is a leading cause of disability worldwide and is a major contributor to the overall global burden of disease.
• More women are affected by depression than men.
• Depression can lead to suicide.
• There are effective psychological and pharmacological treatments for moderate and severe depression.

Overview

Depression is a common illness worldwide, with more than 264 million people affected(1). Depression is different from usual mood fluctuations and short-lived emotional responses to challenges in everyday life. Especially when long-lasting and with moderate or severe intensity, depression may become a serious health condition. It can cause the affected person to suffer greatly and function poorly at work, at school and in the family. At its worst, depression can lead to suicide. Close to 800 000 people die due to suicide every year. Suicide is the second leading cause of death in 15-29-year-olds.

Although there are known, effective treatments for mental disorders, between 76% and 85% of people in low- and middle-income countries receive no treatment for their disorder(2).  Barriers to effective care include a lack of resources, lack of trained health-care providers and social stigma associated with mental disorders.

Major depression is a consequential public health problem in the United States. Depression has long been recognized as an important target of intervention in psychology and psychiatry, but these fields have focused efforts primarily on treatment rather than prevention. Although effective preventive interventions targeting high-risk groups have been developed, they have thus far had poor reach and sustainability in the community. The development of sustainable preventive interventions that have the potential to impact population health represents a critical goal for the field. To this end, a research agenda incorporating the perspectives of both mental health disciplines and public health is proposed as a guide for future depression prevention research. Increased interdisciplinary collaboration between mental health disciplines and public health is recommended to develop, enact, and evaluate multi-level preventive interventions aimed at reducing the population health burden of major depression.

Contributing factors and prevention

Depression results from a complex interaction of social, psychological and biological factors. People who have gone through adverse life events (unemployment, bereavement, psychological trauma) are more likely to develop depression. Depression can, in turn, lead to more stress and dysfunction and worsen the affected person’s life situation and depression itself.

There are interrelationships between depression and physical health. For example, cardiovascular disease can lead to depression and vice versa.

Prevention programmes have been shown to reduce depression. Effective community approaches to prevent depression include school-based programmes to enhance a pattern of positive thinking in children and adolescents. Interventions for parents of children with behavioural problems may reduce parental depressive symptoms and improve outcomes for their children. Exercise programmes for the elderly can also be effective in depression prevention.

Diagnosis and treatment

There are effective treatments for moderate and severe depression. Health-care providers may offer psychological treatments such as behavioural activation, cognitive behavioural therapy (CBT) and interpersonal psychotherapy (IPT), or antidepressant medication such as selective serotonin reuptake inhibitors (SSRIs) and tricyclic antidepressants (TCAs). Health-care providers should keep in mind the possible adverse effects associated with antidepressant medication, the ability to deliver either intervention (in terms of expertise, and/or treatment availability), and individual preferences. Different psychological treatment formats for consideration include individual and/or group face-to-face psychological treatments delivered by professionals and supervised lay therapists.

Psychosocial treatments are also effective for mild depression. Antidepressants can be an effective form of treatment for moderate-severe depression but are not the first line of treatment for cases of mild depression. They should not be used for treating depression in children and are not the first line of treatment in adolescents, among whom they should be used with extra caution.