PARTICIPANTS
AUTISM SPECTRUM DISORDERS OUTCOME STUDY
AND TRAINING PROJECT

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Participants

Cohort 1 - 67 Students - (began study in 1998)
Cohort 2 - 56 Students - (began study in 2001)

Sixty-seven preschool students, between the ages of 2-6, whose primary diagnosis for services was autism spectrum disorder, began participating in this study in the fall of 1998. These 67 students in cohort #1 represented approximately 10% of all the children ages 2-6 in Oregon whose primary diagnosis for services was autism . The majority of the students in the first cohort were 3 and 4 years of age at the beginning of the study.

In the fall of 2001, 56 additional students between 2-4 years old were added to the study. This new cohort of students represented approximately 16% of all the 2-4 year olds in Oregon whose primary diagnosis for services was autism.

TABLE 1 - Ages of Students in the Study Compared to All Oregon Students
 Cohort #1 - Began study in 1998
Cohort #2 - Began study in 2001
November 2001 Student Participants
(Cohorts #1 & #2 combined)		Oregon
Census
Numbers
Age
Group

Subjects in each
age group
(November 1998)

Subjects in each
age group
(November 2001)

Subjects in
each
age group
(November
2001)

1998 Oregon Census of children whose primary disabling condition was autism

2001 Oregon
Census of children whose primary disabling condition
was autism

2912121834
323373786130
42277126192
51009196211
63022217255
70020226249
80010232289
9002185280
Total67
Total subjects beginning study in 1998		56
Total subjects beginning study in 2001
119*
Total students participating in November 2001
* Some students from cohort #1 have moved out of the Pacific Northwest and are no longer in study

1286
Total students ages 2 -9 in
1998 Oregon Census

1640
Total students
ages 2-9 in
2001 Oregon Census



Baseline Demographics of Participants
The subjects were located in eight geographic areas of the state in approximate proportion to the population. All eight Oregon Regional Services, Special Education Programs were invited to nominate students for the study. Region I located in the far eastern portion of the state, nominated no students in 1998 but did include 4 students in 2001. This area is located in the least populated section of Oregon. Age group baseline scores for the study population, matched the children from the national standardization data from the primary monitoring instrument used in this study, the ASIEP-2 (Arick, et., al, 1996), within one-standard deviation of the population mean.

This table shows the demographic information for each student in the study. The information is broken down between cohort #1 and #2. Cohort #1 began the study in 1998 and Cohort #2 began the study in 2001. It also shows initial ASIEP-2 mean percentiles and other mean scores for all students from their first assessments.
AUTISM OUTCOME STUDY STUDENT DEMOGRAPHICS
(Baseline Data)
Cohort #1 - Began study in 1998
Cohort #2 - Began Study in 2001
Regional Program
Cohort #1
Cohort #2
 
Number of Students
Number of Students
Region I - Eastern Oregon Regional Program
0
4
Region II - Central Oregon Regional Program
5
6
Region III - Southern Oregon Regional Program
10
3
Region IV - Cascade Regional Program
8
2
Region V - Mid-Oregon Regional Program
7
10
Region VI - Columbia Regional Program
10
12
Region VII - Lane Regional Program
7
10

Region VIII - Northwest Regional Program

20
9
Students Participating in each cohort
67
56
Baseline Information Reported By Teachers
 
Cohort #1
Cohort #2
Gender
73% Male
27% Female
71% Male
29% Female
Average total hours per week of instruction at home and school as reported by teachers
18.5 hours
11 hours

Range of Instructional hours per week (home and school) as reported by teachers

6 - 40 hours
0 - 25 hours

Percent of students listed as non-verbal by teachers.
*Please Note: definition changed for cohort #2
34% *(uses no words to communicate)
56% * (can not use 5 or more words to communicate)
Data Collected From Initial Assessments by Research Team
 
Cohort #1
Cohort #2
Average age of students at their first assessment
51.45 months
39 months
ASIEP-2 Interaction Assessment score (mean percentile rank)
56.4
56.4
ASIEP-2 Sample of Vocal Behavior score (mean percentile rank)
42.5
42.4
ASIEP-2 Sample of Vocal Behavior Interpreted Language score (mean age)
23.30 months
21 months
ASIEP-2 Educational Assessment score (mean percentile rank)
62.7
78.6
ASIEP-2 Autism Behavior Checklist (mean score)
71.8
64.9

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