Clinical high-risk criteria of psychosis in 8–17-year-old community subjects and inpatients not suspected of developing psychosis

Table 6 Frequency of brief intermittent and attenuated psychotic symptoms in the four diagnostic subsamples and the community sample (n = 539)

	ED (n = 97)	ADHD (n = 86)	AnxD and OCD (n = 94)	ASS (n = 29)	Community subjects (n = 233)	χ² test; Cramer’s V
P1: Unusual thought content/delusional ideas: n(%)	6 (6.2)	4 (4.7)	14 (14.9)1	4 (13.8)	13 (5.6)	χ² (4) = 11.391; aP = 0.023, V = 0.145
P2: Suspiciousness/persecutory ideas: n(%)	2 (2.1)	1 (1.2)	4 (4.3)	3 (10.3)2	4 (1.7)	χ² (4) = 9.425; P = 0.051, V = 0.132
P3: Grandiose ideas: n(%)	0	0	0	0	1 (0.4)	χ² (4) = 1.316; P = 0.859, V = 0.049
P4: Perceptual abnormalities/hallucinations: n(%)	14 (14.2)	20 (23.3)	22 (23.4)	8 (27.6)	54 (23.2)	χ² (4) = 4.150; P = 0.368, V = 0.088
P5: Disorganized communication: n(%)	0	0	0	0	1 (0.4)	χ² (4) = 1.316; P = 0.859, V = 0.049

¹most frequent in AnxD and OCD: thought insertion and broadcasting; unusual, somatic and nihilistic idea;

²most frequent in ASS: ideas of being redlined or observed (common rating). In bold, cells with standard residuals ≥ |1.96|. This equals a significant deviation (less or more) from the expected cell frequency. ED: Eating disorder; ADHD: Attention-deficit hyperactivity disorder; AnxD and OCD: Anxiety disorder, including obsessive-compulsive disorder; ASS: Asperger’s syndrome. V: Cramer’s V: 0.1 = weak effect; 0.3 = moderate effect; 0.5 = strong effect.