A Review of the Epidemiology of Major Depressive Disorder and of its consequences for Society and the individual.

Depression is a common and debilitating disease that affects people from adolescence to old age. The impact of depression extends beyond the individual with depressive symptoms. Depression adversely affects the mental and physical health, and the social and financial welfare of the individual and society. We will address how factors including sex, age, ethnicity and societal changes affect the prevalence of depression, consider common co-morbid conditions and highlight the lessons learned from treating depression.