Advancing Understanding of Transportation Options (AUTO)
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT04141891 |
Recruitment Status :
Active, not recruiting
First Posted : October 28, 2019
Last Update Posted : July 14, 2021
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Diabetic Retinopathy Macular Degeneration Glaucoma Retinitis Pigmentosa Vision Disorders Acute Coronary Syndrome Implantable Defibrillator User Congestive Heart Failure Hypertrophic Obstructive Cardiomyopathy Orthostatic Hypotension Syncope Presyncope Narcolepsy Dementia Multiple Sclerosis Parkinson Disease Brain Injuries Spinal Cord Injuries Stroke Vertigo Dizziness Seizures Substance Use Insulin Dependent Diabetes Mellitus Arthritis Foot--Abnormalities Chronic Obstructive Pulmonary Disease Obstructive Sleep Apnea End Stage Renal Disease Sleep Apnea Insomnia Restless Legs Syndrome | Behavioral: Driving Decision Aid Behavioral: Older Drivers Website | Not Applicable |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 528 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Single (Outcomes Assessor) |
Primary Purpose: | Health Services Research |
Official Title: | Decision Making Among Older Adults: the AUTO Study |
Actual Study Start Date : | December 12, 2019 |
Estimated Primary Completion Date : | August 1, 2023 |
Estimated Study Completion Date : | August 1, 2023 |

Arm | Intervention/treatment |
---|---|
Experimental: Driving Decision Aid
Web-based Driving Decision Aid
|
Behavioral: Driving Decision Aid
Healthwise DDA
Other Name: DDA |
Active Comparator: Older Drivers Website
National Institute on Aging (NIA) Older Drivers website
|
Behavioral: Older Drivers Website
National Institute on Aging (NIA) Older Drivers Website |
- Decisional Conflict Scale (DCS) Scores at Day 0 (Post-intervention) [ Time Frame: Day 0 (Post-intervention) ]The DCS is a 16-item scale (with Likert scale response options) that has high reliability and test-retest correlation (Cronbach's alpha coefficients > 0.78). In prior work, the DCS has been shown to discriminate between known groups who make or delay decisions (effect size 0.4-0.8),53 with lower scores indicating low decision conflict (and greater likelihood of implementing a decision). Scores <25 (out of 100 total) are associated with implementing decisions; scores <25 represent positive outcomes. The measure will be assessed immediately following administration of control condition or intervention
- Values Clarity Subscale Score at Day 0 (Post-intervention) [ Time Frame: Day 0 (Post-intervention) ]The "Values Clarity" subscale of the DCS will be used to examine specifically how much participants feel their decisions are in line with their values. Three DCS items are summed and multiplied by 8.33; scores range from 0 (extremely clear) to 100 (extremely unclear about personal values). Lower Values Clarity Subscale Scores are associated with positive outcomes. The measure will be assessed immediately following administration of control condition or intervention
- Older adult driving safety knowledge scores as assessed by true/false questions at Day 0 (Post-intervention) [ Time Frame: Day 0 (Post-intervention) ]The following true/false questions will be used to examine participants' safe driving knowledge: 1) Older drivers pose a bigger risk to other drivers and pedestrians than younger drivers do; 2) Drivers aged 70 years and older are more likely to be hurt or killed if they are in a crash; 3) There is a milestone age when everyone should stop driving; 4) With age, a person needs more light to see well; 5) Getting lost on familiar roads is a sign that it might be time to stop driving. A higher number of correctly answered questions indicate better outcomes. The measure will be assessed immediately following administration of control condition or intervention
- Decision Self Efficacy score at Day 0 (Post-intervention) [ Time Frame: Day 0 (Post-intervention) ]The Decision Self-Efficacy Scale will be used to assess decision self efficacy. Scores range from 0 (extremely low) to 100 (extremely high self-efficacy). Higher scores indicate better outcomes. The measure will be assessed immediately following administration of control condition or intervention
- Change in Patient-Reported Outcomes Measurement Information System (PROMIS) 4-item depression score [ Time Frame: 6 months, 12 months, 18 months, 24 months ]Change in depression will be measured using the PROMIS 4-item scale, with higher scores indicating higher depression. All PROMIS scores are analyzed as standardized T-scores (mean=50, standard deviation=10). Lower scores indicate better outcomes.
- Change in Ottawa Decision Regret score [ Time Frame: 6 months, 12 months, 18 months, 24 months ]Change in decision regret will be measured by the Ottawa Decision Regret Scale. This validated measure correlates with decision satisfaction and conflict, and overall quality of life. Scored from 0-100, high scores represent higher regret. Lower scores indicate better outcomes.
- Change in Life Space score [ Time Frame: 6 months, 12 months, 18 months, 24 months ]Life space is a global measure of mobility and community engagement. The Life-Space Assessment instrument (UAB Study of Aging) is a validated tool assessing recent mobility and function. Composite scores range from 0 (bedbound) to 120 (travel out of town every day without assistance); scores of ≤60 are correlated with lower levels of social participation and higher mortality. Higher scores indicate better outcomes.
- Change in self-reported driving frequency [ Time Frame: 6 months, 12 months, 18 months, 24 months ]Self-reported driving frequency will be measured by number of days per week participants drive, with consideration of higher or lower frequency as a positive or negative outcome in the context of participant's intent to drive with lower or higher frequency.
- Change in self-reported situational driving avoidance [ Time Frame: 6 months, 12 months, 18 months, 24 months ]Driving avoidance in certain situations will be measured by asking participants about their avoidance of riskier driving situations, e.g., nighttime driving, with consideration of avoidance in certain situations as a positive or negative outcome in the context of participant's intent to avoid these situations.
- Occurrence of driving cessation [ Time Frame: 6 months, 12 months, 18 months, 24 months ]Driving cessation will be measured by asking participants which of the following driving cessation options best describes their driving behavior: no driving cessation, partial driving cessation, or complete driving cessation. Consideration of driving cessation as a positive or negative outcome will be determined in the context of participant's intent to engage in driving cessation.
- Occurrence of self-reported crashes [ Time Frame: 6 months, 12 months, 18 months, 24 months ]Occurrence of self-reported crashes will be measured by ≥1 crash versus no crashes, where ≥1 crash is a negative outcome.

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria for drivers:
- 70 years or older
- Fluent in English
- At least one medical condition linked in driving cessation
- Drive at least one time per week
- Have a study partner* (*drivers interested in participating in the study without a study partner will be placed on a wait list; they may be contacted as a later date for enrollment once 200 driver-study partner dyads have been enrolled across all sites)
- 5-minute MoCA score greater or equal to 21
Exclusion Criteria for drivers:
- In legal custody or institutionalized
- Significant cognitive impairment as measured by 5-minute Montreal Cognitive Assessment (MoCA)
- Since the last time they had their license renewed, has had at least one major change to health, vision, or hearing that has seriously impaired driving (based on potential participant self-report)
- Feels the Department of Motor Vehicles would have serious concerns about their driving (based on potential participant self-report)
Inclusion Criteria for study partners:
- 18 years or older
- Fluent in English
- Identified by Driver participant to contact for potential participation, i.e., part of a driver-study partner dyad
- 5-minute MoCA score greater or equal to 21
Exclusion Criteria for study partners:
- In legal custody or institutionalized
- Significant cognitive impairment as measured by 5-minute Montreal Cognitive Assessment (MoCA)

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04141891
United States, California | |
University of California, San Diego | |
La Jolla, California, United States, 92037 | |
United States, Colorado | |
CU Anschutz Medical Center | |
Aurora, Colorado, United States, 80045 | |
United States, Indiana | |
Indiana University | |
Indianapolis, Indiana, United States, 46202 |
Principal Investigator: | Marian E Betz, MD, MPH | University of Colorado - Anschutz Medical Campus |
Responsible Party: | University of Colorado, Denver |
ClinicalTrials.gov Identifier: | NCT04141891 |
Other Study ID Numbers: |
19-0059 R01AG059613 ( U.S. NIH Grant/Contract ) |
First Posted: | October 28, 2019 Key Record Dates |
Last Update Posted: | July 14, 2021 |
Last Verified: | July 2021 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Apnea Sleep Apnea Syndromes Lung Diseases, Obstructive Pulmonary Disease, Chronic Obstructive Sleep Apnea, Obstructive Vertigo Parkinson Disease Multiple Sclerosis Brain Injuries Spinal Cord Injuries Seizures Restless Legs Syndrome Syncope Narcolepsy Hypotension, Orthostatic |
Vision Disorders Macular Degeneration Diabetic Retinopathy Retinitis Retinitis Pigmentosa Kidney Failure, Chronic Heart Failure Acute Coronary Syndrome Cardiomyopathies Hypotension Cardiomyopathy, Hypertrophic Diabetes Mellitus, Type 1 Syndrome Dizziness Substance-Related Disorders |