Subsyndromal generalised anxiety disorder: operationalisation and epidemiology - a systematic literature survey.

The diagnosis of anxiety disorders, like other psychiatric disorders also, is operationalised since the introduction of diagnostic manuals. The diagnostic criteria of Generalised Anxiety Disorder (GAD) have been tightened in the last decades. This leads to the exclusion of patients with a high level of anxiety, but not fulfilling certain of the GAD-criteria, from effective treatment. Such so-called subsyndromal, subthreshold or subclinical GAD-states, however, often exhibit a comparable burden of disease like the full syndromal disorder and often tend to develop into the full syndromal disorder. The purpose of this review is - beside systematically reporting the papers found in respective data bases from 2013 onwards - to summarise the relevant data regarding definitions, epidemiology and consequences of subsyndromal anxiety states in order to give a comprehensive review.