Table 5.

Association between IED frequency and level of cognitive function controlling for age and sex.

Variable	Coeff.	SE	t	95% CI	p
MENTAL PROCESSING SCALE
Condition (ASD = 1/TD = 0)	−12.2	2.6	−4.8	−17.2 to −7.1	< 0.05
IED frequency (/10 s)	−8.0	1.6	−4.9	−11.3 to −4.8	< 0.05
Condition × IED frequency	14.3	3.2	4.4	8.0 to 20.6	< 0.05
Age (months)	0.15	0.8	1.93	−0.0 to 0.3	0.05
Sex (male = 1/female = 0)	0	2	0	−3.9 to 3.8	0.99 <
ACHIEVEMENT SCALE
Condition (ASD = 1/TD = 0)	−8.8	2.8	−3.1	−14.3 to −3.3	< 0.05
IED frequency (/10 s)	−1.83	3.1	−0.6	−7.9 to 4.2	0.55
Condition × IED frequency	3.3	4.9	0.7	−6.3 to 13.0	0.49
Age (months)	0	0.1	0	−0.2 to 0.2	0.96
Sex (male = 1/female = 0)	−2.7	2.3	−1.2	−7.3 to 1.8	0.25

Coeff., regression coefficient; SE, robust standard error; CI, confidence interval; ASD, autism spectrum disorder; TD, typically developed controls.