Communicating Multiple Disease Risks: A Translation of Risk Prediction Science

Not Applicable

Completed

• Conditions: Healthy Volunteers
• Interventions: Behavioral: Risk Assessment App; Other: Surveys; Behavioral: Audio Recording - Sleep; Behavioral: Audio Recording - Exercise; Other: Text message reminders; Other: Text Message Survey

• Registration Number: NCT03255291
• Lead Sponsor: Washington University School of Medicine

Brief Summary

Epidemiology seeks to improve public health by identifying risk factors for cancer and other diseases and conveying that information to relevant audiences (e.g., physicians, the public). The audience is presumed to understand and use that information to make appropriate decisions about lifestyle behaviors and medical treatments. Yet, even though a single risk factor can affect the risk of multiple health outcomes, this information is seldom communicated to people in a way that optimizes their understanding of the importance of engaging in a single healthy behavior. Providing individuals with the ability to understand how a single behavior (obtaining sufficient physical activity) could affect their risk of developing multiple diseases could foster a more coherent and meaningful picture of the behavior's importance in reducing health risks, increase motivation and intentions to engage in the behavior, and over time improve public health.

The proposed study translates epidemiological data about five diseases that cause significant morbidity and mortality (i.e., colon cancer, breast cancer (women), heart disease, diabetes, and stroke) into a visual display that conveys individualized risk estimates in a comprehensible, meaningful, and useful way to diverse lay audiences.

Detailed Description

Not available

Study Timeline

• Study Start: 2017-06-27
• Study First Submitted: 2017-08-07
• Study First Submitted QC: 2017-08-18
• Study First Posted: 2017-08-21
• Primary Completion: 2019-01-03
• Study Completion: 2019-01-03
• Results First Submitted: 2019-12-12
• Status Verified: 2020-01
• Results First Submitted QC: 2020-01-09
• Last Update Submitted: 2020-01-09
• Results First Posted: 2020-01-18
• Last Update Posted: 2020-01-18

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 554

Inclusion Criteria

• 30-64 years of age
• Less than (3) relevant comorbidities (diabetes, heart disease, stroke, and cancer, where cancer counts as (2) comorbidities for women but (1) for men)
• Having a SMS capable mobile phone that is not shared with anyone else

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Exclusion Criteria

• Not meeting national guidelines for aerobic physical activity (i.e., at least 150 minutes per week of moderate intensity aerobic physical activity)
• Participants from HRPO# 201501028 will be ineligible for this study
• Uses text messaging less than once per month

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: FACTORIAL

Arm && Interventions

Group	Intervention	Description
Risk Display Format:Risk Ladder:Imagery Behavior:Exercise	Audio Recording - Exercise	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Risk Ladder:Imagery Behavior:Sleep	Risk Assessment App	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Risk Ladder:Imagery Behavior:Exercise	Surveys	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Risk Ladder:Imagery Behavior:Sleep	Surveys	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table: Imagery Behavior:Sleep	Text message reminders	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Risk Ladder:Imagery Behavior:Exercise	Risk Assessment App	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Risk Ladder:Imagery Behavior:Sleep	Text Message Survey	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table:Imagery Behavior:Exercise	Audio Recording - Exercise	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table:Imagery Behavior:Exercise	Text message reminders	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table:Imagery Behavior:Exercise	Text Message Survey	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Risk Ladder:Imagery Behavior:Exercise	Text message reminders	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Risk Ladder:Imagery Behavior:Exercise	Text Message Survey	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Risk Ladder:Imagery Behavior:Sleep	Audio Recording - Sleep	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table: Imagery Behavior:Sleep	Risk Assessment App	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table: Imagery Behavior:Sleep	Surveys	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Risk Ladder:Imagery Behavior:Sleep	Text message reminders	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Sleep	Risk Assessment App	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Sleep	Audio Recording - Sleep	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table:Imagery Behavior:Exercise	Risk Assessment App	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table:Imagery Behavior:Exercise	Surveys	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table: Imagery Behavior:Sleep	Text Message Survey	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Exercise	Text Message Survey	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Table: Imagery Behavior:Sleep	Audio Recording - Sleep	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Exercise	Risk Assessment App	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Exercise	Text message reminders	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Exercise	Surveys	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Exercise	Audio Recording - Exercise	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down an exercise goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Sleep	Surveys	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Sleep	Text message reminders	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.
Risk Display Format:Text:Imagery Behavior:Sleep	Text Message Survey	* With help from a research assistant, participants complete the Risk Assessment App. The App asks demographic \& health questions. It then provides personalized risk estimates for participants' current activity level \& how it would change with regular exercise. * Participants take Baseline Survey 1. * Participants listen to an audio recording that guides them through a mental imagery activity. They write down a sleep goal \& are asked to practice the mental imagery twice a day for 3 weeks. * Participants take Baseline Survey 2. * Participants receive text messages reminding them to practice the mental imagery twice daily for 5 minutes each time (3 texts a week for 3 weeks). * Participants take surveys via text at the end of each week for 4 weeks. * 90 days post-baseline, participants complete a survey sent through the mail. * Participants may be contacted for another survey 1 year later.

Primary Outcome Measures

Name	Time	Method
Change From Baseline to 90-day Follow-up in Self Reported Weekly Minutes of Exercise	Baseline and up to 90 days
Difference in Gist Comprehension of Risk Information by Risk Display Format	Baseline	* Risk display format = risk ladder, table, or text; * Gist comprehension of risk information: being able to extract the bottom-line meaning of information provided by the website (e.g., if exercising decreased heath risk); * Measured by the sum of (4) questions coded as correctly comprehending risk information (1 point) or incorrectly comprehending risk information (0 points), with a total score range of 0=low comprehension to 4=high comprehension. Higher comprehension is considered a better outcome.; * All comprehension questions have an additional "don't know" option, which is counted as incorrect.; * To limit participant burden, the investigators assessed comprehension for diabetes only, instead of all diseases as planned.; * Comprehension will not be assessed for people who report a history of diabetes because they are not given risk information.
Difference in Verbatim Comprehension of Risk Information by Risk Communication Strategy	Baseline	* Risk communication strategy = risk ladder, table, or text; * Verbatim comprehension of risk information: being able to recall the exact information specific to diabetes risk and hours of recommended weekly physical activity; * Measured by the sum of (3) questions coded as correctly comprehending information (1 point) or incorrectly comprehending information (0 points), with a total score range of 0=low comprehension to 3=high comprehension. Higher comprehension is considered a better outcome.; * All comprehension questions have an additional "don't know" option, which is counted as incorrect.; * To limit participant burden, the investigators assessed comprehension for diabetes only, instead of all diseases as planned.; * Comprehension will not be assessed for people who report a history of diabetes because they are not given risk information.
Difference in Self-reported Intentions to Engage in Physical Activity by Risk Display Format	Baseline	* Risk display format = risk ladder, table, or text; * Self-reported physical activity intentions is defined as intentions to engage in physical activity in the next 3 months; * Measured as an average of three variables, each measured on a 5 point Likert Scale (range: 1=lower intentions to 5=higher intentions); * Higher intentions are considered a better outcome

Secondary Outcome Measures

Name	Time	Method
Effect of the Intervention on Physical Activity Levels as Measured by Maintenance Self-efficacy	90 days	* Maintenance Self-efficacy is defined as being sure one can engage in physical activity even when it is hard; * Measured on a 4 point Likert Scale (range: 1=lower Maintenance Self-efficacy to 4=higher Maintenance Self-efficacy); * Higher maintenance self-efficacy is considered a better outcome; * Note: to limit participant burden, the investigators used a single item instead of averaging across multiple items
Effect of the Intervention on Physical Activity Levels as Measured by Perceived Vividness of Self-regulatory Imagery	90 days	* Perceived Vividness of Self-regulatory Imagery is defined as having clear and vivid images of steps towards getting physical activity; * Measured as an average of two variables measured on a 4 point Likert Scale (range: 1=lower Perceived Vividness of Self-regulatory Imagery to 4=higher Perceived Vividness of Self-regulatory Imagery); * Higher Perceived Vividness of Self-regulatory Imagery is considered a better outcome; * Note: to limit participant burden, the investigators used a single item instead of averaging across multiple items
Effect of the Intervention on Physical Activity Levels as Measured by Action Planning	90 days	* Action planning is defined as having a detailed plan about getting adequate physical activity; * Measured as an average of three variables measured on a 4 point Likert Scale (range: 1=lower action planning to 4=higher action planning); * Higher action planning is considered a better outcome; * Note: to limit participant burden, the investigators used a single item instead of averaging across multiple items
Effect of the Intervention on Physical Activity Levels as Measured by Recovery Self-efficacy	90 days	* Recovery Self-efficacy is defined as being sure one can re-engage in physical activity after putting it off; * Measured on a 4 point Likert Scale (range: 1=lower recovery Self-efficacy to 4=higher recovery Self-efficacy); * Higher recovery self-efficacy is considered a better outcome; * Note: to limit participant burden, the investigators used a single item instead of averaging across multiple items
Effect of the Intervention on Physical Activity Levels as Measured by Affective Attitudes to Exercise - Thinking Behavior is Unpleasant	90 days	* Affective Attitudes to Exercise - Thinking Behavior is Unpleasant is defined as not thinking getting regular exercise is unpleasant; * Measured on a 4 point Likert Scale (range: 1=lower Affective Attitudes to Exercise to 4=higher Affective Attitudes to Exercise); * Higher Affective Attitudes to Exercise - Thinking Behavior is Unpleasant is considered a better outcome; * Note: to limit participant burden, the investigators used a single item instead of averaging across multiple items
Effect of the Intervention on Physical Activity Levels as Measured by Affective Attitudes to Exercise - Enjoying Behavior	90 days	* Affective Attitudes to Exercise - Enjoying Behavior is defined as thinking getting regular exercise is enjoyable; * Measured on a 4 point Likert Scale (range: 1=lower Affective Attitudes to Exercise to 4=higher Affective Attitudes to Exercise); * Higher Affective Attitudes to Exercise - Enjoying Behavior is considered a better outcome; * Note: to limit participant burden, the investigators used a single item instead of averaging across multiple items
Effect of the Intervention on Physical Activity Levels as Measured by Coping Planning	90 days	* Coping planning is defined as having a detailed plan of solving problems that may prevent getting adequate physical activity; * Measured on a 4 point Likert Scale (range: 1=lower Coping Planning to 4=higher Coping Planning); * Higher coping planning is considered a better outcome; * Note: to limit participant burden, the investigators used a single item instead of averaging across multiple items
Effect of the Intervention on Physical Activity Levels as Measured by Action Self-efficacy	90 days	* Action self-efficacy is defined as having the confidence to engage in physical activity; * Measured on a 4 point Likert Scale (range: 1=lower Action Self-efficacy to 4=higher Action Self-efficacy); * Higher Action Self-efficacy is considered a better outcome; * Note: to limit participant burden, the investigators used a single item instead of averaging across multiple items

Trial Locations

Locations (1)

Washington University School of Medicine; 🇺🇸 Saint Louis, Missouri, United States