Table 3.

Comparing Control and Subthreshold Autistic Traits Children Who Participated in the Diagnostic Assessment

	Control	Subthreshold ASD	F/x2, p
	n = 35	n = 25
Child characteristics
Age in years, mean (SD)	6.19 (0.36)	5.76 (0.31)****	F(1,59) = 23.56, p < .0001
Male, n (%)	18 (51.43)	17 (68.00)	x2 = 2.24, p = .13
Autistic traits (SRS), mean (SD)
Social communication/interaction	24.51 (10.47)	48.09 (10.07)****	F(1,59) = 122.53, p < .0001
Restricted/ repetitive behavior	3.67 (3.64)	10.40 (4.32)****	F(1,59) = 61.58, p < .0001
Total raw score	28.18 (13.63)	58.49 (12.66)****	F(1,59) = 127.71, p < .0001
Emotional/behavioral problems (SDQ), mean (SD)
Emotional symptoms	1.23 (1.31)	3.08 (2.24)****	F(1,59) = 14.83, p < .0001
Conduct problems	1.37 (1.19)	3.46 (1.77)****	F(1,59) = 25.96, p < .0001
Hyperactivity/Inattention problems	1.91 (1.48)	5.25 (2.56)****	F(1,59) = 35.36, p < .0001
Peer problems	1.03 (1.34)	3.00 (1.79)****	F(1,59) = 27.25, p < .0001
Prosocial behavior	7.11 (1.89)	5.29 (2.22)****	F(1,59) = 16.01, p < .0001
Total difficulties	5.54 (3.11)	14.79 (5.18)****	F(1,59) = 69.28, p < .0001
Intelligence quotient (WIPSSI), mean (SD)
VIQ	109.64 (15.78)	94.75 (17.50)**	F(1,59) = 8.66, p < .005
PIQ	118.94 (15.36)	107.25 (12.70)*	F(1,59) = 5.91, p < .05
FIQ	117.00 (15.89)	100.60 (14.37)**	F(1,59) = 8.78, p < .005

Univariate analyses of variance with age as a covariate were used for continuous data and Chi-square analyses for categorical variables

The significance results refer to Control vs. Subthreshold ASD

SD Standard deviation, SRS Social Responsiveness Scale, SDQ Strengths and Difficulties Questionnaire, WPPSI Wechsler Preschool and Primary Scale of Intelligence, VIQ Verbal Intelligence Quotient, PIQ Pictorial Intelligence Quotient, FIQ Full Intelligence Quotient

The SRS and SDQ scores were measured in Wave 1

**** p < .0001, *** p < .001, **p < .01 * < .05