The proportion of people with primary affective disorders presenting to early intervention services: systematic review and meta-analysis

Abstract

Background People with affective psychotic disorders often face diagnostic delays and presentations are under-recognised at first contact with early intervention services (EIS). Despite their clinical significance, most research and service models for first-episode psychosis (FEP) have focused on non-affective psychoses. Aims We sought to clarify the relative prevalence of affective psychoses in EIS. Method A systematic review and random-effects meta-analysis of observational studies reporting proportion of affective psychotic disorders among individuals presenting to EIS with FEP was conducted. Eligible studies included treated FEP populations diagnosed using DSM/ICD criteria. Searches were..