Glaucoma Screening to Enhance At-Risk Californians' Health - Survey Response Incentives
Recruiting
Who can join
Ages 50 and older · All sexes
Full eligibility criteria
Inclusion Criteria: \- Participating in GSEARCH trial Exclusion Criteria: \- Patients without a valid phone number
About the study
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.
What is being tested
- $5 gift card (other)
- $100 monthly drawing (other)
Sponsor: University of California, San Francisco · Participants: 2,000 · Started: Feb 1, 2026
Contact the study team
- Dionna Wittberg, MPH · Phone: 13306083016
Official record on ClinicalTrials.gov — NCT07755748
Locations in the U.S.
| California | Baywell Health, Oakland |
Conditions
From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.