Glaucoma Screening to Enhance At-Risk Californians' Health - Survey Response Incentives

This is a randomized trial to assess whether offering a financial incentive will improve the response rate to a telephone survey. Three incentive approaches will be compared: a $5 gift card, entry into a monthly $100 drawing, or no incentive.

NCT Number	NCT07755748
Lead Sponsor	University of California, San Francisco Collaborators: Centers for Disease Control and Prevention
Conditions	Screening
Enrollment	2,000 participants
Start Date	2026-08-01
Primary Completion	2027-08-01 (estimated)
Study Completion	2028-08-01 (estimated)
Updated on ClinicalTrials.gov	2026-08-10