. Author manuscript; available in PMC: 2021 Oct 1.

Published in final edited form as: Eur Child Adolesc Psychiatry. 2020 Jan 24;29(10):1453–1464. doi: 10.1007/s00787-019-01455-w

Table 2.

One-sample t-tests comparing the mean of each diagnostic group with population mean of 100

Diagnosis	Mean (SD)	t-value	p-value

No full psychiatric diagnoses	97.2 (12.9)	2.34	.02
Psychosis	84.5 (13.1)	6.57	<.0001
Autism spectrum disorder	88.7 (15.3)	8.29	<.0001
Mood disorders	90.6 (14.6)	8.32	<.0001
ADHD (all)	92.2 (13.2)	12.51	<.0001
ADHD-C	92.3 (13.5)	9.29	<.0001
ADHD-I	91.7 (12.8)	8.34	<.0001
Anxiety disorders	92.3 (14.4)	8.22	<.0001
Conduct disorder	92.3 (13.8)	6.40	<.0001
Oppositional defiant disorder	94.4 (14.3)	3.97	.0001

ADHD-C = ADHD combined type; ADHD-I = ADHD inattentive type