Table 5.

Study and Authors	Sample Characteristics APS(Attenuated Psychotic Symptoms) BLIPS(Brief Limited Psychotic Symptoms) Trait (Genetic risk)	Duration and Instruments	Rates of Conversion to Psychosis
Personal Assessment and Crisis Evaluation Clinic (PACE) Nelson et al., 2011	Sample size=817 Help- seeking 83 percent with APS 27 percent with Trait	6 months Comprehensive Assessment for At Risk Mental State (CAARMS)	72/817 = 9 percent APS alone=9.4 percent APS + Trait = 8.7 percent
North America Prodrome Longitudinal Study (NAPLS) Cannon et al., 2008	Sample size=291 Help- seeking 97 percent with APS	30 months Structured Interview for Prodromal Symptoms (SIPS)	82/291 = 28 percent Conversion rate increased to 52 percent among 118 individuals with APS+Genetic Risk
Outreach and Support in South London (OASIS) Fusar-Poli et al., 2010	Sample size=152 Help- seeking Ultra-High Risk (all three groups)	24 months CAARMS	24/152 = 15.6 percent
European Prediction of Psychosis Study (EPOS) Ruhrmann et al., 2010	Sample size=245 Help-seeking Ultra-High Risk (all 3 groups) and Basic- Symptom based COGDIS	18 months SIPS and Bonn Scalefor the Assessment of Basic Symptoms (BSABS)	37/183 = 20 percent By UHR criteria 21 percent By COGDIS criteria 19 percent
Edinburgh High-Risk Study (EHRS) Johnstone et al., 2005	Sample size = 163 Young adults with family history of schizophrenia (two affected relatives)	30 months	20/147 = 13 percent Presence of schizotypy increased likelihood of conversion
UCLA Study Schlosser et al., 2011	Sample size=84 Help- seeking Ultra-High Risk	24 months SIPS	27/84 = 32 percent
Orygen Youth Health (OHY) Yung et al., 20008	Sample size=119 Help- seeking Ultra-High Risk	24 months CAARMS	19/119 = 16 percent