Taking people in United StatesNo phase
Testing whether small rewards help people answer a glaucoma screening phone survey
Compares a gift card, a prize drawing, or nothing to boost survey replies.
Plain-language title generated from the registry record
Registry title: Glaucoma Screening to Enhance At-Risk Californians' Health - Survey Response Incentives
Key facts
- Where
- Oakland and San Francisco, United StatesSee the 2 sites
Where in United States
- Baywell HealthOakland, United StatesTaking people
- University of California San FranciscoSan Francisco, United StatesNo longer taking part
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- University of California, San Francisco
- Trial code
- NCT07755748
- Record updated
- 9 September 2026
- Original description
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.Read full original descriptionShow less
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.
Inclusion: Participating in GSEARCH trial.
Exclusion: Patients without a valid phone number.