A stratified model for psychosis prediction in clinical practice.

Abstract:

OBJECTIVE:Impaired cognition is an important dimension in psychosis and its at-risk states. Research on the value of impaired cognition for psychosis prediction in at-risk samples, however, mainly relies on study-specific sample means of neurocognitive tests, which unlike widely available general test norms are difficult to translate into clinical practice. The aim of this study was to explore the combined predictive value of at-risk criteria and neurocognitive deficits according to test norms with a risk stratification approach. METHOD:Potential predictors of psychosis (neurocognitive deficits and at-risk criteria) over 24 months were investigated in 97 at-risk patients. RESULTS:The final prediction model included (1) at-risk criteria (attenuated psychotic symptoms plus subjective cognitive disturbances) and (2) a processing speed deficit (digit symbol test). The model was stratified into 4 risk classes with hazard rates between 0.0 (both predictors absent) and 1.29 (both predictors present). CONCLUSIONS:The combination of a processing speed deficit and at-risk criteria provides an optimized stratified risk assessment. Based on neurocognitive test norms, the validity of our proposed 3 risk classes could easily be examined in independent at-risk samples and, pending positive validation results, our approach could easily be applied in clinical practice in the future.

journal_name

Schizophr Bull

journal_title

Schizophrenia bulletin

authors

Michel C,Ruhrmann S,Schimmelmann BG,Klosterkötter J,Schultze-Lutter F

doi

10.1093/schbul/sbu025

subject

Has Abstract

pub_date

2014-11-01 00:00:00

pages

1533-42

issue

6

eissn

0586-7614

issn

1745-1701

pii

sbu025

journal_volume

40

pub_type

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