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The Psychosis High-Risk State: A Comprehensive State-of-the-Art Review.
Fusar-Poli, Paolo MD, PhD; Borgwardt, Stefan MD, PhD; Bechdolf, Andreas MD; Addington, Jean PhD; Riecher-Rossler, Anita MD, PhD; Schultze-Lutter, Frauke PhD; Keshavan, Matcheri MD; Wood, Stephen MD, PhD; Ruhrmann, Stephan MD, PhD; Seidman, Larry J. MD, PhD; Valmaggia, Lucia MSc, PhD; Cannon, Tyrone PhD; Velthorst, Eva MSc, PhD; De Haan, Lieuwe MD, PhD; Cornblatt, Barbara MBA, PhD; Bonoldi, Ilaria MD; Birchwood, Max DSc; McGlashan, Thomas MD; Carpenter, William MD; McGorry, Patrick MD; Klosterkotter, Joachim MD, PhD; McGuire, Philip MD, PhD; Yung, Alison MD
[Review] JAMA Psychiatry. 70(1):107-120, January 2013.

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Context: During the past 2 decades, a major transition in the clinical characterization of psychotic disorders has occurred. The construct of a clinical high-risk (HR) state for psychosis has evolved to capture the prepsychotic phase, describing people presenting with potentially prodromal symptoms. The importance of this HR state has been increasingly recognized to such an extent that a new syndrome is being considered as a diagnostic category in the DSM-5.

Objective: To reframe the HR state in a comprehensive state-of-the-art review on the progress that has been made while also recognizing the challenges that remain.

Data Sources: Available HR research of the past 20 years from PubMed, books, meetings, abstracts, and international conferences.

Study Selection and Data Extraction: Critical review of HR studies addressing historical development, inclusion criteria, epidemiologic research, transition criteria, outcomes, clinical and functional characteristics, neurocognition, neuroimaging, predictors of psychosis development, treatment trials, socioeconomic aspects, nosography, and future challenges in the field.

Data Synthesis: Relevant articles retrieved in the literature search were discussed by a large group of leading worldwide experts in the field. The core results are presented after consensus and are summarized in illustrative tables and figures.

Conclusions: The relatively new field of HR research in psychosis is exciting. It has the potential to shed light on the development of major psychotic disorders and to alter their course. It also provides a rationale for service provision to those in need of help who could not previously access it and the possibility of changing trajectories for those with vulnerability to psychotic illnesses.