Has increased provision of treatment reduced the prevalence of common mental disorders? Review of the evidence from four countries

Abstract

Many people identified as having common mental disorders in community surveys do not receive treatment. Modelling has suggested that closing this “treatment gap” should reduce the population prevalence of those disorders. To evaluate the effects of reducing the treatment gap in industrialized countries, data from 1990 to 2015 were reviewed from four English-speaking countries: Australia, Canada, England and the US. These data show that the prevalence of mood and anxiety disorders and symptoms has not decreased, despite substantial increases in the provision of treatment, particularly antidepressants. Several hypotheses for this lack of improvement were considered. There was no support for th..