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International Center for Disability Information

By Disability Type, The Number Of People Served By IDEA, By Age Group (2002).
Disability Type Age 3-5 Years Age 6-11 Years Age 12-17 Years Age 18-21 Years
Specific Learning Disabilities
14,972
1,028,083
1,681,532
136,520
Speech Or Language Impairments
307,597
946,802
131,938
5,010
Mental Retardation
23,777
216,781
309,227
66,416
Emotional Disturbance
7,000
156,194
294,618
25,344
Multiple Disabilities
9,386
55,043
55,951
16,006
Hearing Impairments
7,361
32,559
33,054
4,632
Orthopedic Impairments
9,966
36,649
31,706
4,951
Other Health Impairments
13,606
154,734
171,041
10,785
Visual Impairments
3,170
11,813
11,525
1,958
Autism
16,854
63,363
28,390
5,576
Deaf/Blindness
213
644
676
253
Traumatic Brain Injury
965
7,710
10,921
2,062
Developmental Delay
197,217
44,867
NA
NA
Total
612,084
2,755,242
2,760,579
279,513

Note: "NA" indicates data not applicable.

Data in this table include populations from the 50 states and the District of Columbia.
In order to use the category of Developmental Delay for reporting, states had to have defined and established eligibility criteria for Developmental Delay. Of States using the Developmental Delay category, only people age 3-9 years were included.


To calculate the percent of people in a certain age group who were served for a specific disability type, divide the number served in the age group for the specific disability type by the total number of people served in that age group and multiply the result by 100. Example: Of people age 3-5 years who were served, calculate the number served for Autism. This calculation would be: 16,854/612,084=.028 and .028x100=2.8%

Source: Office of Special Education Programs (OSEP), Data Tables for OSEP State Reported Data, IDEA Part B Child Count 2001-2002.

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