Table 1.

Birth year 1992, special education eligibility for all cases residing in the region in surveillance year 2000 (age 8 years) and all cases residing in the region in surveillance year 2007 (age 15 years)

	Age 8 in 2000 N=61	Age 15 in 2007 N=67	p-value
% of ASD cases in special education	87%	75%	0.08
Autism	21%	58%	0.00†
Intellectual Disability	30%	10%	0.02†
Emotional Disorder	8%	4%	0.50
Learning Disorder	13%	10%	0.90
Speech and Language Disorder	9%	2%	0.10
Orthopedic Impairment	2%
Hearing Impairment	·	·
Vision Impairment	2%	·	0.30
Cross-categorical	2%	·	0.30
Other Health Impairment	·	16%	0.00†
Traumatic Brain Injury	·	·
Pre-school child with Disability	·	·
Other/Not Stated*	11%	·	0.01†

^†Statistically significant

^*In 2000, some children’s IEPs did not clearly state a special education eligibility. Formatting of IEPs in the study area became standardized between 2000 and 2007 so that all children had special education eligibilities clearly stated in their records in 2007.