Inattention and hyperactive/impulsive component scores do not differentiate between autism spectrum disorder and attention-deficit/hyperactivity disorder in a clinical sample

Table 1 Descriptive data of study sample

	ASD (n = 303)	ADHD (n = 319)	p value	Cohen’s d
	Mean (SD)	Mean (SD)	p value	Cohen’s d
Age (years)	11.22 (3.43)	10.08 (2.74)	< 0.001**	0.37
IQ^a	87.49 (24.63)	97.50 (15.91)	< 0.001**	0.48
ABAS composite scores^b
Conceptual	71.07 (15.36)	81.38 (14.04)	< 0.001 **	0.70
Social	70.96 (12.43)	85.68 (16.52)	< 0.001 **	1.00
Practical	64.23 (18.35)	79.49 (17.19)	< 0.001 **	0.86
SCQ score	19.96 (7.86)	7.76 (5.94)	< 0.001 **	1.75
SWAN INA score	4.72 (2.94)	5.40 (2.88)	< 0.01 **	0.23
SWAN IMP/HYP score	3.68 (2.96)	3.49 (3.10)	0.43	0.06
	n (%)	n (%)	p value
Males	242 (79.87%)	253 (79.31%)	0.92
Clinical co-occurring ASD^c	-	4 (1.36%)	-
Clinical co-occurring ADHD^d	55 (18.97%)	-	-
ASD caseness	221 (72.94%)	43 (13.48%)	< 0.001**
ADHD caseness	161 (53.14%)	200 (62.70%)	0.02*

ADHD attention-deficit/hyperactivity disorder, ASD autism spectrum disorder, ABAS adaptive behavior assessment system, SCQ social communication questionnaire, SWAN strengths and weaknesses of ADHD symptoms and normal behavior questionnaire, INA inattention, HYP/IMP hyperactivity/impulsivity
^a30 ASD participants were missing IQ information and 193 ADHD participants were missing IQ information
^b24 ASD participants were missing ABAS information and 131 ADHD participants were missing ABAS information
^c13 ASD participants were missing co-occurring mental health condition information
^d25 ADHD participants were missing co-occurring mental health condition information
*p < 0.05
**p < 0.01

ISSN: 2040-2392