Table 3.

SOPS principal component analysis in the whole sample and adolescents under 15 years

	Study Sample, n=150			Patients under 15 years of age, n=68
	SOPS Negative Symptom Factor	SOPS Positive Symptom Factor	SOPS Disorganization Symptom Factor	SOPS Distress Symptom Factor	SOPS Positive Symptom Factor	SOPS Negative Symptom Factor	SOPS Disorganization Symptom Factor
P1. Unusual Thought Content/Delusional Ideas	0.414	0.622	-0.014	0.237	0.704	0.195	-0.016
P2. Suspiciousness/Persecutory Ideas	0.521	0.552	-0.098	0.408	0.671	0.077	-0.139
P3. Grandiosity	-0.161	0.787	0.136	-0.236	0.714	-0.067	0.178
P4. Perceptual Abnormalities/Hallucinations	0.282	0.672	-0.088	0.175	0.811	-0.031	-0.168
P5. Disorganized Communication	-0.075	0.321	0.671	-0.204	0.267	0.276	0.584
N1. Social Anhedonia	0.663	-0.08	0.271	0.557	-0.167	0.279	0.266
N2. Avolition	0.744	-0.43	0.227	0.479	0.02	0.521	0.113
N3. Expression of Emotion	0.561	-0.178	0.506	0.213	-0.021	0.803	-0.122
N4. Experience of Emotions and Self	0.8	-0.122	0.117	0.436	0.186	0.58	-0.278
N5. Ideational Richness	-0.055	0.792	-0.331	0.111	0.81	0.208
N6. Occupational Functioning	0.516	-0.017	0.381	0.45	-0.111	0.199	0.39
D1. Odd Behavior or Appearance	0.08	0.406	0.546	-0.06	0.362	0.259	0.416
D2. Bizarre Thinking	0.018	0.79	0.135	-0.066	0.814	-0.034	0.228
D3. Trouble with Focus and Attention	0.102	0.112	0.626	0.065	0.009	0.131	0.62
D4. Personal Hygiene	0.202	0.222	0.519	0.169	-0.047	0.419	0.26
G1. Sleep Disturbance	0.709	0.264	-0.146	0.679	0.249	-0.162	0.133
G2. Dysphoric Mood	0.845	0.16	-0.176	0.699	0.239	0.215	-0.094
G3. Motor Disturbances	-0.067	0.432	0.268	0.286	0.098	-0.312	0.633
G4. Impaired Tolerance to Normal Stress	0.78	0.042	0.025	0.863	0.058	-0.028	0.046
KMO (Kaiser-Meyer-Olkin)	0.913			0.787
Bartlett’s Test p value	<0.001			<0.001

SOPS, the Scale of Prodromal Symptoms.