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

Table 7 Severity of clinical high-risk criteria and symptoms (mean SD, median) in inpatients and the community sample (n = 539)

	Inpatients (n = 306)	Community subjects (n = 233)	Mann–Whitney U; Rosenthal’s r
Sum score of SIPS positive items	2.5 ± 2.5, 2	2.1 ± 2.3, 1	Z = -1.852, P = 0.064; r = 0.080
Sum score of 9 basic symptoms of COGDIS	0.8 ± 2.5, 0	0.4 ± 1.2, 0	Z = -1.125, P = 0.260, r = 0.048
Sum score of 10 basic symptoms of COPER	1.6 ± 3.6, 0	0.6 ± 1.7, 0	Z = -3.852, cP < 0.001; r = 0.166
P1: Unusual thought content / delusional ideas	0.9 ± 1.0, 1	0.8 ± 0.9, 1	Z = -1.341, P = 0.180; r = 0.058
P2: Suspiciousness / persecutory ideas	0.4 ± 0.8, 0	0.2 ± 0.6, 0	Z = -4.281, cP < 0.001; r = 0.184
P3: Grandiose ideas	0.1 ± 0.3, 0	0.1 ± 0.4, 0	Z = -0.426, P = 0.670; r = 0.018
P4: Perceptual abnormalities / hallucinations	1.0 ± 1.4, 0	1.0 ± 1.2, 0	Z = -1.119, P = 0.263; r = 0.048
P5: Disorganized communication	0.1 ± 0.3, 0	0.1 ± 0.3, 0	Z = -0.397, P = 0.691; r = 0.017
Inability to divide attention	0.1 ± 0.5, 0	0	Z = -1.514, P = 0.130; r = 0.065
Captivation of attention	0.0 ± 0.2, 0	0.0 ± 0.3, 0	Z = -0.757, P = 0.449; r = 0.033
Disturbance of expressive speech	0.2 ± 0.8, 0	0.1 ± 0.4, 0	Z = -0.268, P = 0.789; r = 0.012
Disturbance of abstract thinking1	0	0.0 ± 0.1, 0	Z = -1.622, P = 0.105; r = 0.070
Thought interference	0.1 ± 0.6, 0	0.1 ± 0.4, 0	Z = -0.591, P = 0.555; r = 0.025
Thought blockages1	0.2 ± 0.8, 0	0.1 ± 0.6, 0	Z = -1.044, P = 0.297; r = 0.045
Thought pressure	0.2 ± 0.9, 0	0.1 ± 0.5, 0	Z = -2.639, bP = 0.008; r = 0.114
Disturbance of receptive speech	0.0 ± 0.3, 0	0.0 ± 0.1, 0	Z = -1.324, P = 0.185; r = 0.057
Unstable ideas of reference	0.0 ± 0.2, 0	0.0 ± 0.2, 0	Z = -1.046, P = 0.296; r = 0.045
Impaired discrimination between ideas/true memories and phantasy	0.1 ± 0.6, 0	0.0 ± 0.3, 0	Z = -0.230, P = 0.818; r = 0.010
Thought perseveration	0.0 ± 0.3, 0	0.0 ± 0.2, 0	Z = -0.607, P = 0.544; r = 0.026
Derealization	0.4 ± 1,1, 0	0.0 ± 0.2, 0	Z = -3.924, cP < 0.001.; r = 0.169
Visual perception disturbances	0.3 ± 1.1, 0	0.1 ± 0.4, 0	Z = -2.822, bP = 0.005; r = 0.122
Acoustic perception disturbances	0.2 ± 0.9, 0	0.2 ± 0.8, 0	Z = -1.014, P = 0.311; r = 0.044

¹Assessable only from age of 13 years onwards, thus only calculated on n = 404.

r: Rosenthal’s r: 0.1 = weak effect; 0.3 = moderate effect; 0.5 = strong effect.