Table 1.

Comparison of prodromal state diagnostic criteria

Ultra–high-risk		Criteria of Prodromal States (COPS)
Attenuated positive symptom criteria		Attenuated positive symptom criteria
	The presence of one or more of the following symptoms: ideas of reference, odd beliefs or magical thinking, paranoid ideation, perceptual disturbance, and odd behavior and appearance of sufficient severity based on the Brief Psychiatric Rating Scale (a rating of 2 or 3 on suspiciousness or unusual thought content scale, 1 or 2 on the hallucinations scale, or 1 to 3 on conceptual disorganization scale) held with some conviction based on rating with the Comprehensive Assessment of Symptoms and History		The presence of one or more of the following symptoms: unusual thought content, suspiciousness, grandiose ideas, perceptual abnormalities, or disorganized communication of sufficient severity (2 to 5), based on the Scale of Prodromal Symptoms rating scale
	At least one symptom must have been present at least 1 week and not longer than 5 years		At least one symptom must have begun or significantly worsened during the past year
	At least one symptom must occur at a frequency of at least several times per week		At least one symptom must occur at a frequency of once per week
Brief limited intermittent psychotic symptoms (BLIP)		Brief intermittent psychotic symptoms
	The presence of one or more of the following symptoms: ideas of reference, odd beliefs or magical thinking, paranoid ideation, perceptual disturbance, and odd behavior and appearance of sufficient severity based on the Brief Psychiatric Rating Scale (a rating of 4 or greater on suspiciousness or unusual thought content scale, 3 or greater on hallucinations scale, or 4 or greater on conceptual disorganization scale) held with strong conviction based on rating with the Comprehensive Assessment of Symptoms and History		The presence of one or more of the following symptoms: unusual thought content, suspiciousness, grandiose ideas, perceptual abnormalities, or disorganized communication at psychotic severity (6), based on the Scale of Prodromal Symptoms rating scale
	The BLIP occurred in the past year		The symptom must have begun or significantly worsened in the past 3 months
	The duration of the episode is less than 1 week and symptoms resolved spontaneously		The symptom must be present for several minutes a day at least once per month
Trait and state		Genetic risk and deterioration
	Schizotypal personality disorder or a first-degree relative with a psychotic disorder		Schizotypal personality disorder or a first-degree relative with a psychotic disorder
	Significant decrease in mental state or functioning for at least 1 month and not longer than 5 years (Global Assessment of Functioning of <30 points from premorbid level); the decrease in functioning occurred within the past year		At least a 30% drop in Global Assessment of Functioning score for at least 1 month in the past 12 months, and the current Global Assessment of Functioning is 90% less than the highest Global Assessment of Functioning in the past year