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

Aneta D. Krakowski; Katherine Tombeau Cost; Evdokia Anagnostou; Meng-Chuan Lai; Jennifer Crosbie; Russell Schachar; Stelios Georgiades; Eric Duku; Peter Szatmari

doi:10.1186/s13229-020-00338-1

Molecular Autism

Table 2 Pattern matrix of PCA loadings of SCQ and SWAN items in combined sample

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

Items	DSM-IV sub-domains	Component 1-SOC/COM	Component 2-RRBI	Component 3-INA	Component 4-HYP/IMP
SCQ 28—show things to engage interest (4/5)	SOC	0.91
SCQ 20—talk to be friendly (4/5)	COM	0.80
SCQ 27—reciprocates smiles (4/5)	SOC	0.80
SCQ 29—shares things (4/5)	SOC	0.79
SCQ 24—nod head (4/5)	COM	0.78
SCQ 35—pretend play (4/5)	COM	0.77
SCQ 22—points to show things (4/5)	COM	0.77
SCQ 31—comforts others (4/5)	SOC	0.77
SCQ 32—use gestures with sounds or words (4/5)	SOC	0.77
SCQ 2—has to and fro conversation	COM	0.76
SCQ 33—normal range of facial expressions (4/5)	SOC	0.75
SCQ 36—interested in other children (4/5)	SOC	0.75
SCQ 37—positive response to other children (4/5)	SOC	0.72
SCQ 34—joins in social games (4/5)	COM	0.71
SCQ 21—spontaneously copies others actions (4/5)	COM	0.70
SCQ 40—plays cooperatively with others (4/5)	SOC	0.67	0.32
SCQ 26—looks at faces (4/5)	SOC	0.59
SCQ 38—pays attention without name being called (4/5)	SOC	0.55	0.36
SCQ 19—has friends	SOC	0.53
SCQ 11—odd interests	RRB		0.79
SCQ 13—intense interests	RRB		0.75
SCQ 18—has to carry around specific object	RRB		0.74
SCQ 12—interested in parts of objects	RRB		0.73
SCQ 14—unusual sensory interests	RRB		0.70
SCQ 6—makes up words	COM		0.70
SCQ 3—uses odd phrases	RRB		0.68
SCQ 15—odd movements	RRB		0.65
SCQ 10—uses other’s hand as tool	SOC		0.64
SCQ 16—repetitive complicated movements	RRB		0.64
SCQ 8—has rituals	RRB		0.63
SCQ 5—mixes up pronouns	COM		0.62
SCQ 4—asks socially inappropriate questions	SOC		0.60
SCQ 17—engages in self-harm	RRB		0.44
SWAN 14—control constant activity	HYP/IMP				0.82
SWAN 13—plays quietly	HYP/IMP				0.79
SWAN 17—awaits turn	HYP/IMP				0.79
SWAN 15—controls excess talking	HYP/IMP				0.77
SWAN 16—controls blurting out answering	HYP/IMP				0.77
SWAN 10—sits still	HYP/IMP				0.67
SWAN 12—modulates motor activity	HYP/IMP				0.65
SWAN 5—organizes tasks	INA			0.85
SWAN 7—loses things	INA			0.81
SWAN 4—follows through on instructions	INA			0.73
SWAN 9—forgetfulness	INA			0.69
SWAN 6—engages in tasks requiring mental effort	INA			0.69
SWAN 1—attention to detail	INA			0.69
SWAN 2—sustains attention	INA			0.61
SWAN 3—listens when spoken to	INA			0.46	0.35
SWAN 8—easily distracted	INA			0.38

Component loadings above 0.3 are shown
ADHD attention-deficit/hyperactivity disorder, ASD autism spectrum disorder, SCQ social communication questionnaire, SWAN strengths and weaknesses of ADHD symptoms and normal behavior questionnaire, RRBI restricted repetitive behaviors and interests, INA inattention, HYP/IMP hyperactivity/impulsivity

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ISSN: 2040-2392

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