Sun Exposure and Activities After Skin Cancer: Optimization of mHealth Interventions

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

• Ages 18 years and older
• All sexes
• No healthy volunteers
• Adult, Older adult

Trial locations and contacts

2 sites in 1 country.

About this study

Official title: SESAME: Sun Exposure and Activities After Skin Cancer: Optimization of mHealth Interventions

Conditions

Melanoma (Skin Cancer)

Being tested

UV Real-Time Alerts, Track Your Sun Protection, Current Conditions, Health Coaching, Action Planning

Keywords

Wearable, Smartphone, Device, Melanoma, Physical activity, Cancer, Actigraph, Sun protection, Sunscreen, Goals, Health, Ultraviolet radiation

Medical subject headings

Melanoma, Motor Activity, Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

• UV Real-Time AlertsBehavioural

  Participants will receive text-based alerts about high-risk sun exposure as assessed by their UV device. If they are assigned this intervention, they will use a UV device.

• Track Your Sun ProtectionBehavioural

  Participants report their clothing and sunscreen use on a digital avatar each time they go outdoors. If they are assigned this intervention, they will use a UV device.

• Current ConditionsBehavioural

  This displays a participant's location's UVR index and notifies them of ultraviolet radiation forecasts for different times throughout the day.

• Health CoachingBehavioural

  Bi-weekly (four times total) a trained health coach will individually call participants to discuss progress towards sun protection goals and provide support and advice. Scheduled calls, pre-interview questions, and goals will be displayed in the app.

• Action PlanningBehavioural

  Participants will be instructed on how to set action plans for sun protection and will receive information from a mobile app about setting plans for enacting health behaviors and counteracting barriers.

• Core ComponentsBehavioural

  All participants receive two core components, messages and lessons. Messages delivers two helpful UV protection tips per week and lessons contains 5 UV education courses for participants to read.

What is being measured

The primary outcome is the main question the study is designed to answer.

1. Feasibility: Retention Rates

   Retention rates will be calculated for the overall study and separately for each component. Feasibility target: <=30% treatment drop-out (or lost to follow-up) in at-least one treatment component. Investigators will report feasibility in aggregate and by site.

   Measured: Intervention period (weeks 2-9)

2. Feasibility: Completion of Daily Assessment Week Surveys

   Assessment completion will be calculated for daily surveys (a combination of MUSE and device logging) completed during each assessment week. Feasibility target: >=80% completion.

   Investigators will report feasibility in aggregate and by site.

   Measured: 1-week bursts at baseline, post-intervention (2 months later) and 12 months post baseline.

3. Feasibility: Completion of Pre-Assessment Week Surveys

   Assessment completion will be calculated for the Pre-Assessment Week Survey (a combination of the Sun Habits Survey, Social Cognitive Theory Questions and Godin Leisure-Time Questionnaire) completed once at the start of each assessment week. Feasibility target: >=80% completion. Investigators will report feasibility in aggregate and by site.

   Measured: 1-week bursts at baseline, post-intervention (2 months later) and 12 months post baseline.

4. Feasibility: Weekly Device Wear

   Device wear will be calculated for the UVR sensor and Actigraph (number of days worn more than 8 hours at each assessment week). Feasibility target: >=80% completion. Investigators will report feasibility in aggregate and by site.

   Measured: 1-week bursts at baseline, post-intervention (2 months later) and 12 months post baseline.

5. Unprotected Sun Exposure

   Unprotected Sun Exposure is calculated based on a combination of self-report and sensor data. The Daily MUSE Inventory, will be used to assess sun exposure based on the outdoor activities that a participant completes. On this measure, participants first select the type, timing, and clothing worn by activity performed. Participants then report on applications of sunscreen, including time applied (or reapplied), body sites covered, and SPF. The UVR sensor will continually assess UVR dose during assessment weeks. The information from the Daily MUSE Inventory will be aligned with data from UVR sensors to generate, unprotected sun exposure, which is the UVR dose weighted by the proportion of body surface area exposed.

   Measured: 1-week bursts at baseline, post-intervention (2 months later), and 12 months post baseline.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

1. First posted29 Apr 2026
2. Study start1 Apr 2025
3. Primary completion20 Nov 2026 (estimated)
4. Study completion1 Sep 2027 (estimated)

Resources

• Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
• Other trials for Melanoma (Skin Cancer)Studies of the same condition, open and under way.
• More trials run by Northwestern UniversityThe sponsor's other registered studies.
• What the trial phases meanHow a treatment moves from first tests in people to approval.

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.