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Advocating for Supports to Improve Service Transitions

Project ASSIST: Advocating for Supports to Improve Service Transitions

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04173663
Acronym
ASSIST
Enrollment
185
Registered
2019-11-22
Start date
2020-01-03
Completion date
2023-08-01
Last updated
2025-01-31

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Autism, Autism Spectrum Disorder

Brief summary

This is a randomized intervention study to develop and test the national curriculum of a parent intervention training targeting parent's ability for advocate for services to improve the transition to adulthood for their youth with autism spectrum disorder (ASD). UPDATE regarding COVID-19: Due to social distancing restrictions, the in-person intervention series that began in Winter 2020 was paused in Spring 2020 for Cohort 1 intervention groups (TN and IL). The series resumed in Summer 2020 via synchronous web-conferencing. In response to continued pandemic regulations, ASSIST was permanently moved to synchronous web-conferencing in Fall 2020, and this method was the mode of delivery for all remaining sessions and series at all sites (TN, IL, WI). The remaining baseline data was also moved to remote collection through online interview and questionnaires in Spring 2020. The data collection for all follow ups and check ins (6, 12, 18, 24, and 30 month) were completed through web conference and/or phone calls in addition to online surveys. The final data collection for experimental and control groups from all sites will be complete by Summer 2023.

Detailed description

The proposed research plan is designed to develop and test the effectiveness of a national curriculum of the ASSIST (Advocating for SupportS to Improve Service Transition) program, a 12-week parent training program targeting parents' ability to advocate for services to improve the transition to adulthood for youth with autism (note that an optional 13th session on secondary transition planning can be offered if ASSIST is being delivered to families of youth who are in high school). Preliminary work demonstrated that youth whose parents participated in the Volunteer Advocacy Program- Transition or VAP-T (a pilot 12-week intervention program on which ASSIST is based) were more likely to be employed or in postsecondary education (PSE), and received more school-based and adult services, when compared to a wait-list control group. In the proposed research, the investigators conduct a randomized-controlled trial with 180 families to build on previous findings in four important ways: 1) by making modifications to the program content to make it applicable to service systems across the nation, and rigorously testing whether the ASSIST program is effective when delivered across three states (Tennessee, Illinois, Wisconsin); 2) by incorporating the perspective of offspring with autism into the intervention and data collection; 3) by examining mechanisms by which the ASSIST program influences youth outcomes; and 4) by exploring barriers to participation and factors that moderate treatment response. The investigators hypothesize that ASSIST participation will improve parents' advocacy ability, leading to higher rates of employment, PSE, social participation, and service access for youth with autism. The investigators will test this hypothesis by randomly assigning parents of transition-aged youth with autism (ages 16-26) to either a treatment or active, materials-only control group, and following families over 3 years. The investigators propose four Specific Aims: (1) To use a multi-site randomized-controlled trial to examine whether ASSIST participation increases parent advocacy ability (i.e. the intervention target); (2) To test whether participating in ASSIST leads to improved youth outcomes (employment, post-secondary education, social participation, service access) during the transition to adulthood; (3) To examine which aspects of parent advocacy ability mediate the relations between ASSIST participation and youth outcomes; and (4) To explore moderators of treatment response and barriers to participation in the intervention. By rigorously testing a new intervention to improve the transition to adulthood for youth with autism, the proposed research addresses an area of critical need as identified by the 2016-7 Interagency Autism Coordinating Committee Strategic Plan. The project will result in a new intervention to improve outcomes for youth with autism that can be disseminated through state and local agencies across the nation.

Interventions

BEHAVIORALASSIST

The ASSIST program is a 12-week advocacy training to educate parents of youth with autism about the adult service system (note that an optional 13th session on secondary transition planning can be offered if ASSIST is being delivered to families of youth who are in high school). It is a group training, comprised of didactic instruction, family-sharing activities, case studies, and group discussions. The ASSIST program for the proposed study will be directed at each site by an experienced Program Facilitator from the community with knowledge about group processes, person-centered planning, and adult service systems, who will be coached by a member of the study team. The ASSIST program will be delivered in full partnership with the local disability community. In most sessions, the Program Facilitator will be aided by community content experts who present the specifics of each topic.

Sponsors

University of Illinois at Urbana-Champaign
CollaboratorOTHER
University of Wisconsin, Madison
CollaboratorOTHER
Vanderbilt University Medical Center
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)

Masking description

Research personnel collecting follow-up data are masked.

Intervention model description

After eligibility is determined and baseline data are collected, parents will be randomized, in two cohorts, to the treatment or materials-only control condition. Given the relatively small sample size in each cohort at each site (n = 30 at each of three sites), simple randomization is not recommended as it might result in unequal group sizes. The investigators will use 1:1 block randomization within each site to give equal number of subjects in each group. To ensure balance of important covariates, the investigators will block on key moderators: whether the youth has an Intellectual Disability (ID) and is in high school. Co-occurring ID and being in vs. out of high school impact service eligibility, and ID impacts the likelihood of post-secondary education (PSE) and community employment. By balancing moderators, the researchers maximize power to detect effect modification of the treatment effect.

Eligibility

Sex/Gender
ALL
Healthy volunteers
Yes

Inclusion criteria

include: 1. parents willing to participate in the ASSIST 12-week intervention, who have an offspring with autism between the ages of 16 and 26 years. This age range was chosen to allow for the testing of whether the ASSIST is more effective if offered prior to versus after high school exit (a key moderator in Aim 4). The investigators set a lower bound of age 16, as that is when transition planning is mandated to have begun in the schools, and an upper bound of age 26 to capture families of youth who are still in the transition years as defined by the Institute of Medicine. If both parents in a family want to attend the training, the investigators will allow it but will designate one as the study's primary respondent. There is no minimum or maximum age limit for parent participants. 2. parents are willing to be randomized to the treatment or control condition; 3. parents are able to travel weekly to one of the project sites (Nashville, TN; Chicagoland;IL; Madison/Milwaukee, WI) to participate in the group ASSIST sessions (12 weekly sessions). The responding parent and the offspring with ASD must also be able to travel to a project site for a diagnostic evaluation to confirm the ASD diagnosis (using the gold- standard Autism Diagnostic Observation Schedule-2 or ADOS-2) and to establish IQ and adaptive behavior functioning; 4. the participating parent and youth must live in one of the states where the intervention is being delivered, as the adult service system is different in every state; 5. son/daughter has a previous diagnosis of ASD from an educational or health care provider, and meets lifetime cut-offs for ASD in a telephone screening of the Social Communication Questionnaire. This will decrease the risk that youth fail to meet diagnostic criteria for ASD during the diagnostic evaluation. Note that although the investigators will collect IQ and adaptive behavior information to assess functioning of the offspring with ASD, this information will not be used to determine eligibility; parents of offspring with all levels of functioning can participate in the ASSIST project; and 6. the participating parent is proficient with the English language, as all ASSIST presentations and data collection materials are in English.

Exclusion criteria

include: 1. parents unable to participate in the ASSIST 12-week intervention due to scheduling conflicts, or who are unable to travel weekly to one of the sites; 2. parents NOT willing to be randomized to the treatment or control condition; 3. parents and/or youth do NOT live in one of the states where the intervention is being delivered; 4. The youth does not have a previous diagnosis of ASD from an educational or health care provider 5. The youth does not meet lifetime cut-offs for ASD in a telephone screening of the Social Communication Questionnaire, answered by the parent. 6. The participating parent is not proficient with the English language.

Design outcomes

Primary

MeasureTime frameDescription
Post-Secondary Youth OutcomesBaseline to 6-month post-intervention, up to month 15; Baseline to 12-month post-intervention, up to month 21Test whether parent participation in the ASSIST intervention leads to increase in post-secondary vocational and educational participation for youth with ASD. The Vocational Index will be used to gather information on employment and post-secondary educational programs that youth with ASD are attending / attended 6 months after the intervention. The Vocational Index will be administered via structured interview. This measure is only applicable to youth who have exited high school.
Change in Advocacy Activities ScaleBaseline to 12-month post-intervention, up to month 21Examine whether ASSIST participation increases the intervention target of parent advocacy activities. The 16-item instrument measures how frequently parents spend time in advocacy activities for the son/daughter with ASD. The response options range from 1 = not at all to 4 = very often. The total score can range from 16 to 64, with higher scores indicating greater parent participation in advocacy activities.
Change in Access to Services Interview: Number of Services the Family Applied forBaseline to 6-month post-intervention, up to month 15; Baseline to 12-month post-intervention, up to month 21Test whether parent participation in the ASSIST intervention leads to increase access to services for youth with ASD transitioning from high school to adulthood. Using questions developed for the National Longitudinal Transition Study-2 (NLTS-2), the investigators will collect data (via a semi-structured interview) on the total number of services that the family applied form (e.g., supplemental security income \[SSI\], vocational rehabilitation services, housing choice voucher). The number of services families can apply for ranges from 0 to 9.
Change in Access to Services Interview: Number of Services the Family is ReceivingBaseline to 6-month post-intervention, up to month 15; Baseline to 12-month post-intervention, up to month 21Test whether parent participation in the ASSIST intervention leads to increase access to services for youth with ASD transitioning from high school to adulthood. Using questions developed for the National Longitudinal Transition Study-2 (NLTS-2) the investigators will collect data (via a semi-structured interview) on total number of services that the family is receiving. For this analysis, services are disaggregated into two types: government (e.g., supplemental security income \[SSI\], vocational rehabilitation services, housing choice voucher) and direct services (e.g, speech-language pathology, respite care, mental health services). The number of government services the family can receive ranges from 0 to 9. The number of direct services the family can receive ranges from 0 to 21.
Treatment Target: Change in Parental Empowerment ScaleBaseline to intervention-end, up to month 10Examine whether ASSIST participation increases the intervention target of parental empowerment measured using the Family Empowerment Scale (FES). The 34-item questionnaire measures the extent to which parents feel empowered across three dimensions: family, the service system; and the larger community and political environment. Items are rated on a 5-point Likert Scale from 1= not at all true to 5 = very true. The total score can range from 34 to 170, with higher scores indicating greater empowerment.
Treatment Target: Change in Parental Knowledge About Adult Services QuestionnaireBaseline to intervention-end, up to month 10Examine whether ASSIST participation increases the intervention target of parental knowledge about adult service systems. A questionnaire based on a measure developed for the Volunteer Advocacy Program Transition (VAP-T) will be used to evaluate parental knowledge about adult services. The questionnaire consists of 22 multiple-choice questions asking for factual information about adult disability services and the adult disability service system. The total score can range from 0 to 22. Higher scores indicate greater knowledge of the adult disability service system.
Treatment Target: Change in Advocacy Skills and Comfort ScaleBaseline to intervention-end, up to month 10Examine whether ASSIST participation increases the intervention target of parent advocacy skills measured by the Advocacy Skills and Comfort Scale (ASC). The 10-item measure assesses the degree to which parents feel comfortable and skilled in advocating for their offspring with ASD. Response options range from 1 = not at all to 5 = excellent. The overall score is calculated by averaging all items and can range from 1 to 5, with higher scores indicating more skills/comfort in advocating for their offspring.

Secondary

MeasureTime frameDescription
Change in Access to Services Interview: Unmet Service NeedsBaseline to 6-month post-intervention, up to month 15; Baseline to 12-month post-intervention, up to month 21Test whether parent participation in the ASSIST intervention leads to decrease in unmet service needs for youth with ASD transitioning from high school to adulthood. Using questions developed for the National Longitudinal Transition Study-2 (NLTS-2), the investigators will collect data (via a semi-structured interview) on total number of unmet service needs that the family is experiencing / experienced.
Access to Services Interview: Barriers to Service ReceiptBaseline to 12-month post-intervention, up to month 21Test whether parent participation in the ASSIST intervention is associated with fewer barriers to services for youth with ASD transitioning from high school to adulthood. Using questions developed for the National Longitudinal Transition Study-2 (NLTS-2), the investigators will collect data (via a semi-structured interview) on the number of barriers to services experienced.
Social Participation Youth OutcomesBaseline to 12-month post-intervention, up to month 21Test whether parent participation in the ASSIST intervention leads to increase in social participation for youth with ASD. Questions developed to measure social participation will be used to measure the social participation achievements of the youth participants before and after ASSIST per parent-report. This measure consists of 10 items with a 5-point Likert scale ranging from 0 = Less than yearly or never to 4 = Several times a week. The total score can range from 0 to 40, with higher scores indicating greater social participation for the youth with ASD.

Countries

United States

Participant flow

Pre-assignment details

The data reported only includes parents who were enrolled in the study. Youth did not receive the intervention. For the purposes of primary and secondary outcome measure reporting youth were not considered enrolled and data was not collected

Participants by arm

ArmCount
ASSIST Intervention Group
This group will attend the 12 sessions of the ASSIST training program (one 2-hour session per week for 12 weeks). ASSIST: The ASSIST program is a 12-week advocacy training to educate parents of youth with autism about the adult service system (note that an optional 13th session on secondary transition planning can be offered if ASSIST is being delivered to families of youth who are in high school). It is a group training, comprised of didactic instruction, family-sharing activities, case studies, and group discussions. The ASSIST program for the proposed study will be directed at each site by an experienced Program Facilitator from the community with knowledge about group processes, person-centered planning, and adult service systems, who will be coached by a member of the study team. The ASSIST program will be delivered in full partnership with the local disability community. In most sessions, the Program Facilitator will be aided by community content experts who present the specifics of each topic.
91
Control: Written Materials Only Group
This informational control group will receive the ASSIST binder and all written materials developed for the program on the same schedule as the treatment group but will not attend the group sessions. After the treatment group is treated and follow up data is collected for comparison between treatment and control, the control group will have the option to take the ASSIST training program. ASSIST: The ASSIST program is a 12-week advocacy training to educate parents of youth with autism about the adult service system (note that an optional 13th session on secondary transition planning can be offered if ASSIST is being delivered to families of youth who are in high school). It is a group training, comprised of didactic instruction, family-sharing activities, case studies, and group discussions. The ASSIST program for the proposed study will be directed at each site by an experienced Program Facilitator from the community with knowledge about group processes, person-centered planning, and adult service systems, who will be coached by a member of the study team. The ASSIST program will be delivered in full partnership with the local disability community. In most sessions, the Program Facilitator will be aided by community content experts who present the specifics of each topic.
94
Total185

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyLost to Follow-up1724
Overall StudyWithdrawal by Subject16

Baseline characteristics

CharacteristicASSIST Intervention GroupControl: Written Materials Only GroupTotal
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
4 Participants3 Participants7 Participants
Age, Categorical
Between 18 and 65 years
87 Participants91 Participants178 Participants
Age, Continuous51.89 years
STANDARD_DEVIATION 6.64
50.28 years
STANDARD_DEVIATION 5.91
51.07 years
STANDARD_DEVIATION 6.31
Ethnicity (NIH/OMB)
Hispanic or Latino
7 Participants7 Participants14 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
84 Participants87 Participants171 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
3 Participants3 Participants6 Participants
Race (NIH/OMB)
Black or African American
9 Participants7 Participants16 Participants
Race (NIH/OMB)
More than one race
2 Participants3 Participants5 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
77 Participants81 Participants158 Participants
Region of Enrollment
United States
91 participants94 participants185 participants
Sex: Female, Male
Female
80 Participants86 Participants166 Participants
Sex: Female, Male
Male
11 Participants8 Participants19 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 910 / 94
other
Total, other adverse events
17 / 9117 / 94
serious
Total, serious adverse events
0 / 910 / 94

Outcome results

Primary

Change in Access to Services Interview: Number of Services the Family Applied for

Test whether parent participation in the ASSIST intervention leads to increase access to services for youth with ASD transitioning from high school to adulthood. Using questions developed for the National Longitudinal Transition Study-2 (NLTS-2), the investigators will collect data (via a semi-structured interview) on the total number of services that the family applied form (e.g., supplemental security income \[SSI\], vocational rehabilitation services, housing choice voucher). The number of services families can apply for ranges from 0 to 9.

Time frame: Baseline to 6-month post-intervention, up to month 15; Baseline to 12-month post-intervention, up to month 21

Population: The data analysis only includes parents who were enrolled in the study. Youth did not receive the intervention.~N reflects the number of participants who completed the measure at each corresponding time point.

ArmMeasureGroupValue (MEAN)Dispersion
ASSIST Intervention GroupChange in Access to Services Interview: Number of Services the Family Applied forChange Score (6 month-Baseline)0.07 servicesStandard Deviation 0.93
ASSIST Intervention GroupChange in Access to Services Interview: Number of Services the Family Applied forChange Score (12 month-Baseline)0.08 servicesStandard Deviation 1.09
Control: Written Materials Only GroupChange in Access to Services Interview: Number of Services the Family Applied forChange Score (6 month-Baseline)0.10 servicesStandard Deviation 0.74
Control: Written Materials Only GroupChange in Access to Services Interview: Number of Services the Family Applied forChange Score (12 month-Baseline)0.10 servicesStandard Deviation 0.76
Comparison: Outcome Variable: Number of services family applied for (6 month post intervention)p-value: 0.308Regression, Linear
Comparison: Outcome Variable: Number of services family applied for (12 month post intervention)p-value: 0.355Regression, Linear
Primary

Change in Access to Services Interview: Number of Services the Family is Receiving

Test whether parent participation in the ASSIST intervention leads to increase access to services for youth with ASD transitioning from high school to adulthood. Using questions developed for the National Longitudinal Transition Study-2 (NLTS-2) the investigators will collect data (via a semi-structured interview) on total number of services that the family is receiving. For this analysis, services are disaggregated into two types: government (e.g., supplemental security income \[SSI\], vocational rehabilitation services, housing choice voucher) and direct services (e.g, speech-language pathology, respite care, mental health services). The number of government services the family can receive ranges from 0 to 9. The number of direct services the family can receive ranges from 0 to 21.

Time frame: Baseline to 6-month post-intervention, up to month 15; Baseline to 12-month post-intervention, up to month 21

Population: The data analysis only includes parents who were enrolled in the study. Youth did not receive the intervention.~N reflects the number of participants who completed the measure at each corresponding time point.

ArmMeasureGroupValue (MEAN)Dispersion
ASSIST Intervention GroupChange in Access to Services Interview: Number of Services the Family is ReceivingGovernment Services Change Score (6 month - Baseline)0.52 servicesStandard Deviation 1.11
ASSIST Intervention GroupChange in Access to Services Interview: Number of Services the Family is ReceivingGovernment Services Change Score (12 month - Baseline)0.50 servicesStandard Deviation 1.05
ASSIST Intervention GroupChange in Access to Services Interview: Number of Services the Family is ReceivingDirect Services Change Score (6 month - Baseline)-0.07 servicesStandard Deviation 1.87
ASSIST Intervention GroupChange in Access to Services Interview: Number of Services the Family is ReceivingDirect Services Change Score (12 month - Baseline)-0.68 servicesStandard Deviation 2.05
Control: Written Materials Only GroupChange in Access to Services Interview: Number of Services the Family is ReceivingDirect Services Change Score (12 month - Baseline)-0.37 servicesStandard Deviation 2.05
Control: Written Materials Only GroupChange in Access to Services Interview: Number of Services the Family is ReceivingGovernment Services Change Score (6 month - Baseline)0.43 servicesStandard Deviation 0.9
Control: Written Materials Only GroupChange in Access to Services Interview: Number of Services the Family is ReceivingDirect Services Change Score (6 month - Baseline)-0.33 servicesStandard Deviation 2.12
Control: Written Materials Only GroupChange in Access to Services Interview: Number of Services the Family is ReceivingGovernment Services Change Score (12 month - Baseline)0.41 servicesStandard Deviation 1.08
Comparison: Outcome Variable: Number of government services family is receiving (6 month post intervention)p-value: 0.699Regression, Linear
Comparison: Outcome Variable: Number of government services the family is receiving (12 month post intervention)p-value: 0.573Regression, Linear
Comparison: Outcome Variable: Number of direct services the family is receiving (6 month post intervention)p-value: 0.43Regression, Linear
Comparison: Outcome Variable: Number of direct services the family is receiving (12 month post intervention)p-value: 0.391Regression, Linear
Primary

Change in Advocacy Activities Scale

Examine whether ASSIST participation increases the intervention target of parent advocacy activities. The 16-item instrument measures how frequently parents spend time in advocacy activities for the son/daughter with ASD. The response options range from 1 = not at all to 4 = very often. The total score can range from 16 to 64, with higher scores indicating greater parent participation in advocacy activities.

Time frame: Baseline to 12-month post-intervention, up to month 21

Population: Of the participants who completed Follow-Up 3, eleven participants in the intervention group and three participants in the control group did not complete this measure, giving us n=70 for the intervention group and n=76 for the control group.

ArmMeasureValue (MEAN)Dispersion
ASSIST Intervention GroupChange in Advocacy Activities Scale-0.84 score on a scale (change score)Standard Deviation 6.93
Control: Written Materials Only GroupChange in Advocacy Activities Scale-1.34 score on a scale (change score)Standard Deviation 4.76
p-value: 0.883Regression, Linear
Primary

Post-Secondary Youth Outcomes

Test whether parent participation in the ASSIST intervention leads to increase in post-secondary vocational and educational participation for youth with ASD. The Vocational Index will be used to gather information on employment and post-secondary educational programs that youth with ASD are attending / attended 6 months after the intervention. The Vocational Index will be administered via structured interview. This measure is only applicable to youth who have exited high school.

Time frame: Baseline to 6-month post-intervention, up to month 15; Baseline to 12-month post-intervention, up to month 21

Population: The number analyzed reflects the number of participants who completed the measure at each corresponding time point.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
ASSIST Intervention GroupPost-Secondary Youth OutcomesNumber of participants who had no activities at baseline but activities at 6 month post intervention7 Participants
ASSIST Intervention GroupPost-Secondary Youth OutcomesNumber of participants who had no activities at baseline but activities at 12month post intervention2 Participants
Control: Written Materials Only GroupPost-Secondary Youth OutcomesNumber of participants who had no activities at baseline but activities at 6 month post intervention4 Participants
Control: Written Materials Only GroupPost-Secondary Youth OutcomesNumber of participants who had no activities at baseline but activities at 12month post intervention5 Participants
Comparison: Outcome Variable: Whether participants were engaged or not engaged in vocational/educational activities (6 month post intervention)p-value: 0.51Regression, Logistic
Comparison: Outcome Variable: Whether participants were engaged or not engaged in vocational/educational activities (12 month post intervention)p-value: 0.296Regression, Logistic
Primary

Treatment Target: Change in Advocacy Skills and Comfort Scale

Examine whether ASSIST participation increases the intervention target of parent advocacy skills measured by the Advocacy Skills and Comfort Scale (ASC). The 10-item measure assesses the degree to which parents feel comfortable and skilled in advocating for their offspring with ASD. Response options range from 1 = not at all to 5 = excellent. The overall score is calculated by averaging all items and can range from 1 to 5, with higher scores indicating more skills/comfort in advocating for their offspring.

Time frame: Baseline to intervention-end, up to month 10

ArmMeasureValue (MEAN)Dispersion
ASSIST Intervention GroupTreatment Target: Change in Advocacy Skills and Comfort Scale0.35 score on a scale (change score)Standard Deviation 0.57
Control: Written Materials Only GroupTreatment Target: Change in Advocacy Skills and Comfort Scale0.15 score on a scale (change score)Standard Deviation 0.55
p-value: 0.014Regression, Linear
Primary

Treatment Target: Change in Parental Empowerment Scale

Examine whether ASSIST participation increases the intervention target of parental empowerment measured using the Family Empowerment Scale (FES). The 34-item questionnaire measures the extent to which parents feel empowered across three dimensions: family, the service system; and the larger community and political environment. Items are rated on a 5-point Likert Scale from 1= not at all true to 5 = very true. The total score can range from 34 to 170, with higher scores indicating greater empowerment.

Time frame: Baseline to intervention-end, up to month 10

ArmMeasureValue (MEAN)Dispersion
ASSIST Intervention GroupTreatment Target: Change in Parental Empowerment Scale4.93 score on a scale (change score)Standard Deviation 13.72
Control: Written Materials Only GroupTreatment Target: Change in Parental Empowerment Scale0.61 score on a scale (change score)Standard Deviation 14.02
p-value: 0.092Regression, Linear
Primary

Treatment Target: Change in Parental Knowledge About Adult Services Questionnaire

Examine whether ASSIST participation increases the intervention target of parental knowledge about adult service systems. A questionnaire based on a measure developed for the Volunteer Advocacy Program Transition (VAP-T) will be used to evaluate parental knowledge about adult services. The questionnaire consists of 22 multiple-choice questions asking for factual information about adult disability services and the adult disability service system. The total score can range from 0 to 22. Higher scores indicate greater knowledge of the adult disability service system.

Time frame: Baseline to intervention-end, up to month 10

Population: Of the participants who completed Follow-Up 1, one participant in the intervention group and one person in the control group did not complete this measure, giving us n=87 for the intervention group and n=87 for the control group.

ArmMeasureValue (MEAN)Dispersion
ASSIST Intervention GroupTreatment Target: Change in Parental Knowledge About Adult Services Questionnaire2.16 score on a scale (change score)Standard Deviation 3
Control: Written Materials Only GroupTreatment Target: Change in Parental Knowledge About Adult Services Questionnaire0.20 score on a scale (change score)Standard Deviation 2.33
p-value: 0.0000154Regression, Linear
Secondary

Access to Services Interview: Barriers to Service Receipt

Test whether parent participation in the ASSIST intervention is associated with fewer barriers to services for youth with ASD transitioning from high school to adulthood. Using questions developed for the National Longitudinal Transition Study-2 (NLTS-2), the investigators will collect data (via a semi-structured interview) on the number of barriers to services experienced.

Time frame: Baseline to 12-month post-intervention, up to month 21

Population: Of the participants who completed Follow-Up 3, eleven participants in the intervention group and three participants in the control group did not complete this measure, giving us n=70 for the intervention group and n=76 for the control group.

ArmMeasureValue (MEAN)Dispersion
ASSIST Intervention GroupAccess to Services Interview: Barriers to Service Receipt2.66 barriersStandard Deviation 2.03
Control: Written Materials Only GroupAccess to Services Interview: Barriers to Service Receipt2.71 barriersStandard Deviation 1.91
p-value: 0.924Regression, Linear
Secondary

Change in Access to Services Interview: Unmet Service Needs

Test whether parent participation in the ASSIST intervention leads to decrease in unmet service needs for youth with ASD transitioning from high school to adulthood. Using questions developed for the National Longitudinal Transition Study-2 (NLTS-2), the investigators will collect data (via a semi-structured interview) on total number of unmet service needs that the family is experiencing / experienced.

Time frame: Baseline to 6-month post-intervention, up to month 15; Baseline to 12-month post-intervention, up to month 21

Population: The data analysis only includes parents who were enrolled in the study. Youth did not receive the intervention.~N reflects the number of participants who completed the measure at each corresponding time point.

ArmMeasureGroupValue (MEAN)Dispersion
ASSIST Intervention GroupChange in Access to Services Interview: Unmet Service NeedsChange Score (6 month - Baseline)-0.28 unmet needsStandard Deviation 2.54
ASSIST Intervention GroupChange in Access to Services Interview: Unmet Service NeedsChange Score (12 month - Baseline)-0.35 unmet needsStandard Deviation 2.59
Control: Written Materials Only GroupChange in Access to Services Interview: Unmet Service NeedsChange Score (6 month - Baseline)-0.43 unmet needsStandard Deviation 2.37
Control: Written Materials Only GroupChange in Access to Services Interview: Unmet Service NeedsChange Score (12 month - Baseline)-0.70 unmet needsStandard Deviation 2.38
Comparison: Outcome Variable: Number of unmet service needs (6 month post intervention)p-value: 0.81Regression, Linear
Comparison: Outcome Variable: Number of unmet service needs (12 month post intervention)p-value: 0.678Regression, Linear
Secondary

Social Participation Youth Outcomes

Test whether parent participation in the ASSIST intervention leads to increase in social participation for youth with ASD. Questions developed to measure social participation will be used to measure the social participation achievements of the youth participants before and after ASSIST per parent-report. This measure consists of 10 items with a 5-point Likert scale ranging from 0 = Less than yearly or never to 4 = Several times a week. The total score can range from 0 to 40, with higher scores indicating greater social participation for the youth with ASD.

Time frame: Baseline to 12-month post-intervention, up to month 21

Population: Of the participants who completed Follow-Up 3, twelve participants in the intervention group and eight participants in the control group did not complete this measure, giving us n=69 for the intervention group and n=71 for the control group.

ArmMeasureValue (MEAN)Dispersion
ASSIST Intervention GroupSocial Participation Youth Outcomes0.13 score on a scale (change score)Standard Deviation 4.38
Control: Written Materials Only GroupSocial Participation Youth Outcomes-0.72 score on a scale (change score)Standard Deviation 4.78
p-value: 0.361Regression, Linear

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026