Table 4.

Summary of Exclusion Criteria of Athens and Copenhagen Cohorts

Criteria	Athens	Copenhagen
Age (years)	<16 or >45	<18 or >45
Period of antipsychotic treatment	>2 weeks	Not antipsychotic naïve
Physical illness, neurological illness, head trauma	Identified	Identified
Intelligence quotient	<65	<70
Current diagnosis of drug dependence	Not examined	Presence
Antidepressant, mood stabilizer use, current or in the past 1 month	Not examined	Presence
Methylphenidate exposure	Not examined	Presence
Diagnosis	Not used as an exclusion criterion	PECANS 1: Any diagnosis other than schizophrenia or schizoaffective disorder
		PECANS II: Any diagnosis other than schizophrenia, schizoaffective or nonorganic psychotic disorder