Table 1.

Predictive Variables in the Domains Investigated in the DUPS Project

Domain	Potentially Predictive Variables	Most Predictive Variable
Neuropsychology	Sustained attention, verbal learning and memory, semantic and phonological fluency, spatial working memory, and motor speed22	Semantic verbal fluency
Clinical variables	All items of the SIPS23	Item “social anhedonia and withdrawal”
Environmental factors	Ethnicity, urbanicity, head trauma, CNS infection, intrauterine or perinatal complications, unemployment, and receiving state benefits24	Urbanicity
Premorbid adjustment	All items of the PAS24	Social-sexual aspects of life during early adolescence (age: 12–15) and premorbid social-personal adjustment (highest level ever attained)
Neurophysiology	N100, N200, N2b, P200, and P30025	Parietal P300 amplitude

Note: DUPS, Dutch Prediction of Psychosis Study; SIPS, Structured Interview for Prodromal Syndromes; CNS, central nervous system; PAS, Premorbid Adjustment Scale.