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

The purpose of this study is to evaluate 5 different smartphone administered sun protection interventions that aim to reduce unprotected sun exposure in melanoma survivors. Participants are asked to wear an ultraviolet (UV) device and an activity monitor (Actigraph) to measure their daily UV exposure and track their physical activity for three separate assessment weeks and complete daily surveys. After the first assessment week, eligible participants are assigned up to 5 different sun protection interventions that are administered through a smartphone application for 8 weeks. Following 8-week use of the sun protection interventions, participants complete another assessment week. At the end of the assessment week, participants provide feedback on the design and usability of the UV device, smartphone application and each of the sun protection interventions that they experienced. One year later, participants are contacted again to complete a final assessment week.

NCT Number	NCT07556380
Lead Sponsor	Northwestern University Collaborators: National Institutes of Health (NIH), Huntsman Cancer Institute, National Cancer Institute (NCI)
Conditions	Melanoma (Skin Cancer)
Enrollment	150 participants
Start Date	2025-04-01
Primary Completion	2026-10-01 (estimated)
Study Completion	2027-09-01 (estimated)
Updated on ClinicalTrials.gov	2026-07-10